Method and device for determining influence mode of hump type modified surface on heat transfer characteristic

Abstract

The invention discloses a method and device for determining the influence mode of a hump-type modified surface on heat transfer characteristics, and the method comprises the steps: obtaining the initial geometric information and material attribute information of a target hump-type modified surface in response to a determination signal of the influence mode of the target hump-type modified surface on the heat transfer characteristics; based on the initial geometric information and the material attribute information, constructing a three-dimensional finite element model, and controlling the three-dimensional finite element model to respectively carry out main convective heat transfer tests and main critical heat flux density tests under different main heat transfer surface areas, controlling the three-dimensional finite element model to perform secondary convective heat transfer tests and secondary critical heat flux density tests under different secondary heat transfer surface areas; based on the main convective heat transfer test result, the main critical heat flux density test result, the secondary convective heat transfer test result and the secondary critical heat flux density test result, the influence of the surface area of the target hump type modified surface on the heat transfer characteristic of the modified surface is determined.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear reactor safety, and in particular to a method and a device for determining the influence of a hump-shaped modified surface on heat transfer characteristics. Background Art

[0002] With the development of emerging processing technologies, it has become possible to prepare modified surfaces with microscopic morphology on metal surfaces using laser surface modification technology. Generally speaking, the use of lasers to prepare microstructures on metal surfaces is a "subtractive" technology that can present properties different from those of the macroscopic base material by preparing microstructure morphology without affecting the macroscopic physical and chemical properties of the base material. In the field of thermal hydraulics and safety analysis of nuclear reactors, the use of laser modification technology to prepare modified surfaces with microscopic morphology on metal surfaces has application potential for heat transfer. In order to further explore the mechanism of enhanced heat transfer of microstructured modified surfaces, it is necessary to evaluate the impact of changes in heat transfer area introduced by the micromorphology of the modified surface.

[0003] At present, the influence of the modified surface on the heat transfer characteristics is usually determined by manually observing the changes in the hot spots on the hump-shaped modified surface. However, this method of manual observation is greatly affected by human subjective factors, resulting in low accuracy in determining the influence of the hump-shaped modified surface on the heat transfer characteristics. At the same time, when the area of ​​the modified surface changes slightly, the naked eye cannot distinguish the changes in the hot spots, which further leads to low accuracy in determining the influence of the hump-shaped modified surface on the heat transfer characteristics. Summary of the invention

[0004] The present invention provides a method and device for determining the influence of a hump-shaped modified surface on heat transfer characteristics, which mainly aims to improve the accuracy of determining the influence of a hump-shaped modified surface on heat transfer characteristics.

[0005] According to a first aspect of the present invention, there is provided a method for determining the influence of a hump-shaped modified surface on heat transfer characteristics, comprising:

[0006] In response to a determination signal of the effect of the target hump-shaped modified surface on the heat transfer characteristics, initial geometric information of the target hump-shaped modified surface is acquired, wherein the initial geometric information includes an initial hump width, an initial hump spacing, an initial hump depth, an initial hump number, an initial surface length and an initial surface width of the target hump-shaped modified surface, and material property information of the target hump-shaped modified surface;

[0007] Based on the initial geometric information and the material property information, construct a three-dimensional finite element model of the target hump-shaped modified surface, and set heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model;

[0008] Based on the same heat transfer boundary condition and the same heat transfer medium type condition, the three-dimensional finite element model is controlled to respectively perform the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas, and the main convection heat transfer test results and the main critical heat flux test results under each of the main heat transfer surface areas are obtained; and the three-dimensional finite element model is controlled to respectively perform the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas, and the secondary convection heat transfer test results and the secondary critical heat flux test results under each of the secondary heat transfer surface areas are obtained, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface;

[0009] Based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results, the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface is determined.

[0010] Optionally, before controlling the three-dimensional finite element model to respectively perform a main convection heat transfer test and a main critical heat flux density test under different main heat transfer surface areas, the method further comprises:

[0011] Under the condition that the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial hump width is unchanged, the initial hump spacing is unchanged, the initial hump depth is unchanged, and the initial hump number is unchanged, the change of the initial surface length and / or the change of the initial surface width is controlled to obtain different main heat transfer surface areas;

[0012] Before controlling the three-dimensional finite element model to respectively perform a secondary convection heat transfer test and a secondary critical heat flux test under different secondary heat transfer surface areas, the method further includes:

[0013] When the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial surface length is the same, and the initial surface width is the same, at least one parameter among the initial hump width, the initial hump spacing, the initial hump depth, and the initial hump number is controlled to obtain different secondary heat transfer surface areas.

[0014] Optionally, the controlling the three-dimensional finite element model to respectively perform a main convection heat transfer test and a main critical heat flux density test under different main heat transfer surface areas, and obtaining the main convection heat transfer test results and the main critical heat flux density test results under each of the main heat transfer surface areas, includes:

[0015] Controlling the three-dimensional finite element model to perform a main convection heat transfer test under different main heat transfer surface areas, and determining the main temperature distribution information and the main heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium during the main convection heat transfer test;

[0016] Determining a main convection heat transfer coefficient under each of the main heat transfer surface areas based on the main temperature distribution information and the main heat flow distribution information;

[0017] Controlling the three-dimensional finite element model to perform a main critical heat flux density test under different main heat transfer surface areas, wherein the method of the main critical heat flux density test comprises: heating each of the main heat transfer surfaces with gradually increasing heating power, during the heating process, recording the wall temperature of each of the main heat transfer surfaces in real time, and determining a target main heating power in which the heating rate of the wall temperature in each of the main heat transfer surfaces is greater than a preset threshold value based on the wall temperature of each of the main heat transfer surfaces at each time;

[0018] Based on the surface area of ​​each of the main heat transfer surfaces and the target main heating power, the main critical heat flux density under each of the main heat transfer surface areas is determined.

[0019] Optionally, the controlling the three-dimensional finite element model to respectively perform secondary convection heat transfer tests and secondary critical heat flux density tests under different secondary heat transfer surface areas, and obtaining secondary convection heat transfer test results and secondary critical heat flux density test results under each of the secondary heat transfer surface areas, includes:

[0020] Controlling the three-dimensional finite element model to perform a secondary convection heat transfer test under different secondary heat transfer surface areas, and determining secondary temperature distribution information and secondary heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium during the secondary convection heat transfer test;

[0021] Determining a secondary convective heat transfer coefficient for each secondary heat transfer surface area based on the secondary temperature distribution information and the secondary heat flux distribution information;

[0022] Controlling the three-dimensional finite element model to perform a secondary critical heat flux density test under different secondary heat transfer surface areas, wherein the method of the secondary critical heat flux density test comprises: heating each of the secondary heat transfer surfaces with gradually increasing heating power, during the heating process, recording the wall temperature of each of the secondary heat transfer surfaces in real time, and determining, based on the wall temperature of each of the secondary heat transfer surfaces at each time, a target secondary heating power at which the heating rate of the wall temperature in each of the secondary heat transfer surfaces is greater than a preset threshold;

[0023] Based on the surface area of ​​each of the secondary heat transfer surfaces and the target secondary heating power, the secondary critical heat flux density under each of the secondary heat transfer surface areas is determined.

[0024] Optionally, determining the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test result, the primary critical heat flux test result, the secondary convection heat transfer test result, and the secondary critical heat flux test result comprises:

[0025] Based on the main convection heat transfer test results, determine whether the main convection heat transfer coefficient under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area; and / or,

[0026] Based on the main critical heat flux test results, judging whether the main critical heat flux under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area;

[0027] If the main convection heat transfer coefficient increases with the increase of the corresponding main heat transfer surface area, and the main critical heat flux increases with the increase of the corresponding main heat transfer surface area, it is determined that the increase of the main heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface;

[0028] Based on the secondary convection heat transfer test results, determine whether the secondary convection heat transfer coefficient under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area; and / or,

[0029] Based on the secondary critical heat flux test results, determining whether the secondary critical heat flux under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area;

[0030] If the secondary convective heat transfer coefficient increases with the increase of the corresponding secondary heat transfer surface area, and the secondary critical heat flux density increases with the increase of the corresponding secondary heat transfer surface area, it is determined that the increase of the secondary heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface.

[0031] Optionally, the main convection heat transfer test results include: the main coefficient change trend of the convection heat transfer coefficient under different main heat transfer surface areas, the main critical heat flux test results include: the main density change trend of the critical heat flux under different main heat transfer surface areas, the secondary convection heat transfer test results include: the secondary coefficient change trend of the convection heat transfer coefficient under different secondary heat transfer surface areas, the secondary critical heat flux test results include: the secondary density change trend of the critical heat flux under different secondary heat transfer surface areas;

[0032] The determining of the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results comprises:

[0033] Inputting the main coefficient change trend and the main density change trend into a first preset heat transfer characteristic influence prediction model for influence prediction, and obtaining the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface;

[0034] The secondary coefficient change trend and the secondary density change trend are input into the second preset heat transfer characteristic influence prediction model for influence prediction, so as to obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0035] Optionally, the inputting the main coefficient change trend and the main density change trend into a first preset heat transfer characteristic influence prediction model for influence prediction to obtain the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface includes:

[0036] Determine the main coefficient eigenvector corresponding to the main coefficient change trend, and determine the main density eigenvector corresponding to the main density change trend;

[0037] Cross-processing the main coefficient eigenvector and the main density eigenvector to obtain a main cross eigenvector;

[0038] Inputting the main cross-eigenvector into the first preset heat transfer characteristic influence prediction model to perform influence prediction, and obtaining the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface;

[0039] The inputting the secondary coefficient change trend and the secondary density change trend into the second preset heat transfer characteristic influence prediction model for influence prediction, and obtaining the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface, includes:

[0040] Determine a secondary coefficient eigenvector corresponding to the secondary coefficient variation trend, and determine a secondary density eigenvector corresponding to the secondary density variation trend;

[0041] Cross-processing the secondary coefficient eigenvector and the secondary density eigenvector to obtain a secondary cross-eigenvector;

[0042] The secondary cross-eigenvector is input into the second preset heat transfer characteristic influence prediction model for influence prediction, so as to obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0043] According to a second aspect of the present invention, there is provided a device for determining the influence of a hump-shaped modified surface on heat transfer characteristics, comprising:

[0044] an acquisition unit, configured to acquire initial geometric information of the target hump-shaped modified surface in response to a determination signal of the influence of the target hump-shaped modified surface on the heat transfer characteristics, wherein the initial geometric information includes an initial hump width, an initial hump spacing, an initial hump depth, an initial hump number, an initial surface length and an initial surface width of the target hump-shaped modified surface, and material property information of the target hump-shaped modified surface;

[0045] A construction unit is used to construct a three-dimensional finite element model of the target hump-shaped modified surface based on the initial geometric information and the material property information, and set the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model,

[0046] A test unit, for controlling the three-dimensional finite element model to respectively perform a main convection heat transfer test and a main critical heat flux test under different main heat transfer surface areas based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, and obtaining the main convection heat transfer test results and the main critical heat flux test results under each of the main heat transfer surface areas, and controlling the three-dimensional finite element model to respectively perform a secondary convection heat transfer test and a secondary critical heat flux test under different secondary heat transfer surface areas, and obtaining the secondary convection heat transfer test results and the secondary critical heat flux test results under each of the secondary heat transfer surface areas, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface onto the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface;

[0047] A determination unit is used to determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux density test results, the secondary convection heat transfer test results, and the secondary critical heat flux density test results.

[0048] According to a third aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for determining the manner in which the hump-shaped modified surface affects heat transfer characteristics.

[0049] According to a fourth aspect of the present invention, there is provided a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for determining the manner in which the above-mentioned hump-shaped modified surface affects the heat transfer characteristics is implemented.

[0050] According to a method and device for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by the present invention, compared with the current method of determining the influence of a modified surface on heat transfer characteristics by manually observing the changes in hot spots on a hump-shaped modified surface, the present invention constructs a three-dimensional finite element analysis model of a target hump-shaped modified surface, and based on the three-dimensional finite element analysis model, performs a main convection heat transfer test and a main critical heat flux density test on the target hump-shaped modified surface under different main heat transfer surface areas, and performs a secondary convection heat transfer test and a secondary critical heat flux density test on the target hump-shaped modified surface under different secondary heat transfer surface areas, and finally determines the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the results of each test, thereby determining the modified surface by performing a simulation test on the hump-shaped modified surface. The influence of the surface area on its heat transfer characteristics. Since the simulation test does not require the use of high temperature, high pressure or toxic and hazardous substances, the safety risks in the test process are reduced, and the problem of low accuracy in determining the influence of the heat transfer characteristics caused by artificial observation of hot spot changes can be avoided. At the same time, the present invention separately analyzes the influence of the area changes of the main heat transfer surface and the secondary heat transfer surface of the hump-type modified surface on its heat transfer characteristics, so that the analysis of the influence of the heat transfer characteristics is more detailed. In addition, the present invention determines the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics through a comprehensive analysis of the convective heat transfer and the critical heat flux density of the hump-type modified surface, thereby avoiding the situation where the influence method is judged incorrectly based on the changes in the red spot, so that the present invention can improve the accuracy of determining the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0052] Figure 1 A flow chart of a method for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by an embodiment of the present invention is shown;

[0053] Figure 2 A schematic diagram of a hump-shaped modified surface microstructure provided by an embodiment of the present invention is shown;

[0054] Figure 3A schematic diagram of describing geometric parameters of a hump surface provided by an embodiment of the present invention is shown;

[0055] Figure 4 A flow chart of another method for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by an embodiment of the present invention is shown;

[0056] Figure 5 A schematic diagram of the structure of a device for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by an embodiment of the present invention is shown;

[0057] Figure 6 A schematic diagram showing the structure of another device for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by an embodiment of the present invention;

[0058] Figure 7 A schematic diagram of the physical structure of a computer device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0059] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0060] At present, the way in which the modified surface affects the heat transfer characteristics is determined by manually observing the changes in hot spots on the hump-shaped modified surface, which results in low accuracy in determining the way in which the hump-shaped modified surface affects the heat transfer characteristics. At the same time, when the area of ​​the modified surface changes slightly, the naked eye cannot distinguish the changes in the hot spots, which further results in low accuracy in determining the way in which the hump-shaped modified surface affects the heat transfer characteristics.

[0061] In order to solve the above problems, an embodiment of the present invention provides a method for determining the influence of a hump-shaped modified surface on heat transfer characteristics, such as Figure 1 As shown, the method includes:

[0062] 101. In response to a determination signal of the effect of a target hump-shaped modified surface on heat transfer characteristics, initial geometric information and material property information of the target hump-shaped modified surface are obtained.

[0063] The initial geometric information includes the initial hump width, initial hump spacing, initial hump depth, initial hump number, initial surface length and initial surface width of the target hump-shaped modified surface; the material property information includes the material type, thermal conductivity, mechanical strength, wear resistance, modification method, type of working fluid, etc. of the target hump-shaped modified surface; the heat transfer characteristics refer to the characteristics exhibited by the target hump-shaped modified surface during heat transfer. The basic morphological characteristics of the hump-shaped modified surface processed by laser are as follows: Figure 2As shown, through laser processing, protrusions arranged regularly and periodically will appear on the metal surface, like "humps", which can be called camel-type modified surface. The camel-type non-smooth surface has periodic grooves of a certain depth on its surface, which is prepared by "subtractive" processing. The camel-type surface is relatively regular, and the spacing, shape and size of its humps are relatively fixed. Since the camel-type surface has periodically arranged protrusions, it is an uneven surface. By controlling the scanning spacing and energy of the laser, the structural size control of the camel-type surface can be achieved. For the camel-type surface in contact with the cooling medium, the change in structural size leads to the change in the uneven heat transfer area of ​​the hump-type surface, which has a certain impact on the heat transfer characteristics of the hump-type surface. The change in the uneven surface of the hump-type modified surface can be characterized by the following parameters: hump width a 1 、Hump width a 2 , hump spacing b, hump depth h. Hump width a 1 、a 2 is the width of the two sides of the hump, in m; the hump spacing b is the spacing between periodic humps, in m; the hump depth h refers to the depth of the hump from the upper surface, in m. The various geometric parameters of the hump in the hump-type modified surface are expressed as follows Figure 3 As shown, the above parameters can describe the basic changes in the uneven heat transfer area of ​​the hump-shaped modified surface, laying the foundation for analyzing the influence of the uneven area changes on the surface heat transfer characteristics.

[0064] Furthermore, the evaluation of the uneven heat transfer area change of the hump-type modified surface can be divided into two dimensions: one is the main heat transfer surface that maintains smooth contact with the working fluid (heat transfer medium) and is basically parallel to the mainstream direction of the working fluid, which is regarded as the main heat transfer area (main heat transfer surface area), which can be estimated based on the hump width a and the hump spacing b; the second is the secondary surface that has poor contact with the working fluid and is difficult to be wetted by the working fluid. For the hump-type modified surface, it is mainly the side of the hump, which is regarded as the secondary heat transfer area (secondary heat transfer surface area), which can be estimated by the hump width a, the hump spacing b, and the hump depth h. The heat transfer characteristics of different hump-type modified surfaces can be evaluated by conducting flow heat transfer experiments and critical heat flux density experiments based on different surfaces. The physical quantities of boiling heat transfer and gas-liquid two-phase flow, surface convection heat transfer coefficient (and critical heat flux density, can be used to reflect the heat transfer characteristics of different hump-type modified surfaces and evaluate the influence of the change of the uneven heat transfer area of ​​the hump-type modified surface on its heat transfer characteristics. This can improve the accuracy of determining the influence of the change of the uneven heat transfer area of ​​the hump-type modified surface on its heat transfer characteristics.

[0065] For the embodiment of the present invention, when it is necessary to study the effect of the surface area of ​​a hump-shaped modified surface on the heat transfer characteristics of the modified surface, it is first necessary to measure and obtain the initial geometric information and material property information of the target hump-shaped modified surface.

[0066] 102. Based on the initial geometric information and material property information, a three-dimensional finite element model of the target hump-shaped modified surface is constructed, and the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model are set.

[0067] Among them, the heat transfer boundary conditions include temperature boundary conditions, pressure boundary conditions, environmental boundary conditions, etc.; the type of heat transfer medium refers to the type of heat transfer medium, including gas, liquid, etc.

[0068] For the embodiment of the present invention, after obtaining the initial geometric information and material property information of the target hump-type modified surface, it is also necessary to determine the roughness, mechanical strength, wear resistance, corrosion resistance and other geometric features of the hump-type modified surface. Then, select finite element software, in the finite element software, use basic geometric shapes to construct the basic framework of the hump-type modified surface, adjust the size and position of these basic shapes according to the initial geometric information to form the desired hump shape, use the modeling tools of the software to refine the geometric features of the hump surface, such as roughness, microstructures, etc., so as to ensure the accuracy and precision of the three-dimensional finite element model, so as to ensure the accuracy of subsequent mesh division and solution, and then define the material properties for the hump-type modified surface in the finite element software, and select a suitable material model according to the type and characteristics of the material. According to the geometric shape and solution requirements of the hump-type modified surface, select a suitable mesh type, use the mesh division tool of the finite element software to generate a three-dimensional mesh of the hump-type modified surface, and finally define the heat transfer boundary conditions and heat transfer medium type conditions, such as temperature boundary conditions, heat flux density boundary conditions or convection heat transfer boundary conditions. As needed, external loads, such as temperature gradients, pressure, etc., can also be applied to the model according to actual working conditions to ensure that the load application method and size are in line with the actual situation, so as to accurately simulate the heat transfer process, and finally run the solver in the finite element software to perform heat transfer analysis. Therefore, the embodiment of the present invention conducts a simulation test on the hump-shaped modified surface to determine the influence of the surface area of ​​the modified surface on its heat transfer characteristics. Since the simulation test does not require the use of high temperature, high pressure or toxic and hazardous substances, the safety risks in the test process are reduced, and the problem of low accuracy in determining the influence of the heat transfer characteristics caused by artificial observation of hot spot changes can be avoided.

[0069] 103. Based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, the three-dimensional finite element model is controlled to carry out the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas, and the main convection heat transfer test results and the main critical heat flux test results under each main heat transfer surface area are obtained; and the three-dimensional finite element model is controlled to carry out the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas, and the secondary convection heat transfer test results and the secondary critical heat flux test results under each secondary heat transfer surface area are obtained.

[0070] Among them, the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-shaped modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-shaped modified surface; the convective heat transfer experiment is an experiment used to study and measure the heat transfer process in a fluid through a flowing medium. The convective heat transfer experiment mainly relies on the relative displacement of particles in the fluid to achieve heat transfer; the critical heat flux density is when the heat flux density reaches a certain value, the boiling state on the heating surface will change significantly, from nucleate boiling to transition boiling or film boiling, and the corresponding heat flux density at this time is the critical heat flux density. The critical heat flux density test is a process test to measure and determine this key parameter.

[0071] For the embodiment of the present invention, since the top surface of the hump is parallel to the flow direction of the working medium (heat transfer medium), if the surface length of the target hump-shaped modified surface is L 长 , surface width is L 短 , then the main heat transfer surface area S of the target hump-shaped modified surface 主 =L 长 ×L 短 , the calculation formula of the secondary heat transfer surface area of ​​the target hump-shaped modified surface is as follows:

[0072]

[0073] Among them, S 次 is the secondary heat transfer surface area, a 1 and a 2h is the hump width, h is the hump depth, and b is the hump spacing. By controlling the surface length and surface width of the target hump-type modified surface, the main heat transfer surface area of ​​the target hump-type modified surface can be changed, thereby obtaining multiple main heat transfer surface areas. By controlling the hump width, hump depth, and hump spacing, the secondary heat transfer surface area of ​​the target hump-type modified surface can be changed, thereby obtaining multiple secondary heat transfer surface areas. In each test process, in order to improve the analysis accuracy of the heat transfer characteristics, it is necessary to ensure that each test must be carried out under the same heat transfer boundary conditions and the same type of heat transfer medium, and other external environments must also be the same, that is, except for the secondary heat transfer surface area or the main heat transfer surface area, other test conditions should be the same. In order to study the influence of the secondary heat transfer surface area and the primary heat transfer surface area on their heat transfer characteristics, it is necessary to carry out convection heat transfer tests and primary critical heat flux tests on the primary heat transfer surface area and the secondary heat transfer surface area, respectively. That is, under the same test conditions, the primary convection heat transfer test and the primary critical heat flux test are respectively carried out under different primary heat transfer surface areas. At the same time, the secondary convection heat transfer test and the secondary critical heat flux test are also carried out under different secondary heat transfer surface areas. Finally, according to the various test results under different primary heat transfer surface areas and the various test results under different secondary heat transfer surface areas, the effect of the change of the primary heat transfer surface area on the modified surface is analyzed. The influence of the area change of the main heat transfer surface and the secondary heat transfer surface on the heat transfer characteristics of the modified surface are analyzed, and the influence of the change of the area of ​​the secondary heat transfer surface on the heat transfer characteristics of the modified surface are analyzed respectively by the present invention, so that the analysis of the influence mode of the heat transfer characteristics is more detailed. Therefore, the present invention determines the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics through a comprehensive analysis of the convective heat transfer and the critical heat flux density of the hump-type modified surface, so as to avoid the situation where the influence mode is judged incorrectly based on the change of erythema, so that the present invention can improve the accuracy of determining the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics.

[0074] 104. Based on the main convection heat transfer test results, the main critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results, determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface.

[0075] Among them, the main convection heat transfer test results include: the main coefficient change trend of the convection heat transfer coefficient under different main heat transfer surface areas, the main critical heat flux density test results include: the main density change trend of the critical heat flux density under different main heat transfer surface areas, the secondary convection heat transfer test results include: the secondary coefficient change trend of the convection heat transfer coefficient under different secondary heat transfer surface areas, the secondary critical heat flux density test results include: the secondary density change trend of the critical heat flux density under different secondary heat transfer surface areas.

[0076] For the embodiment of the present invention, after determining the main convection heat transfer test results, the main critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results, it is necessary to determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface according to the above test results. Based on this, step 104 specifically includes: based on the main convection heat transfer test results, judging whether the main convection heat transfer coefficient under each of the main heat transfer surface areas increases with the increase of the corresponding main heat transfer surface area; and / or, based on the main critical heat flux test results, judging whether the main critical heat flux under each of the main heat transfer surface areas increases with the increase of the corresponding main heat transfer surface area; if the main convection heat transfer coefficient increases with the increase of the corresponding main heat transfer surface area, and the main critical heat flux increases with the increase of the corresponding main heat transfer surface area, then the main convection heat transfer coefficient increases with the increase of the corresponding main heat transfer surface area, and the main critical heat flux increases with the increase of the corresponding main heat transfer surface area. If the secondary convection heat transfer coefficient increases with the increase of the corresponding secondary heat transfer surface area, it is determined that the increase in the main heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface; based on the secondary convection heat transfer test results, it is determined whether the secondary convection heat transfer coefficient under each of the secondary heat transfer surface areas increases with the increase of the corresponding secondary heat transfer surface area; and / or, based on the secondary critical heat flux test results, it is determined whether the secondary critical heat flux under each of the secondary heat transfer surface areas increases with the increase of the corresponding secondary heat transfer surface area; if the secondary convection heat transfer coefficient increases with the increase of the corresponding secondary heat transfer surface area, and the secondary critical heat flux increases with the increase of the corresponding secondary heat transfer surface area, it is determined that the increase in the secondary heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface.

[0077] Specifically, based on the analysis of the changing trends of the heat transfer coefficient and the critical heat flux density, when the main convection heat transfer coefficient increases with the increase of the corresponding main heat transfer surface area, and the main critical heat flux density increases with the increase of the corresponding main heat transfer surface area, it is determined that the increase in the main heat transfer surface area of ​​the target hump-type modified surface will enhance the heat transfer characteristics of the target hump-type modified surface. Similarly, if the secondary convection heat transfer coefficient increases with the increase of the corresponding secondary heat transfer surface area, and the secondary critical heat flux density increases with the increase of the corresponding secondary heat transfer surface area, it is determined that the increase in the secondary heat transfer surface area of ​​the target hump-type modified surface will enhance the heat transfer characteristics of the target hump-type modified surface.

[0078] According to a method for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by the present invention, compared with the current method of determining the influence of the modified surface on heat transfer characteristics by artificially observing the changes in hot spots on the hump-shaped modified surface, the present invention constructs a three-dimensional finite element analysis model of a target hump-shaped modified surface, and based on the three-dimensional finite element analysis model, performs a main convection heat transfer test and a main critical heat flux density test on the target hump-shaped modified surface under different main heat transfer surface areas, and performs a secondary convection heat transfer test and a secondary critical heat flux density test on the target hump-shaped modified surface under different secondary heat transfer surface areas, and finally determines the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the results of each test, thereby determining the surface area of ​​the modified surface by performing a simulation test on the hump-shaped modified surface. The influence of surface area on its heat transfer characteristics. Since the simulation test does not require the use of high temperature, high pressure or toxic and hazardous substances, the safety risks in the test process are reduced, and the problem of low accuracy in determining the influence of heat transfer characteristics caused by artificial observation of hot spot changes can be avoided. At the same time, the present invention separately analyzes the influence of area changes of the main heat transfer surface and the secondary heat transfer surface of the hump-type modified surface on its heat transfer characteristics, so that the analysis of the influence of heat transfer characteristics is more detailed. In addition, the present invention determines the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics through a comprehensive analysis of the convective heat transfer and critical heat flux density of the hump-type modified surface, thereby avoiding the situation where the influence mode is judged incorrectly based on the change of red spots. Therefore, the present invention can improve the accuracy of determining the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics.

[0079] Further, in order to better illustrate the process of determining the factors affecting the heat transfer characteristics of the hump-shaped modified surface, as a refinement and extension of the above embodiment, the embodiment of the present invention provides another method for determining the influence of the hump-shaped modified surface on the heat transfer characteristics, such as Figure 4 As shown, the method includes:

[0080] 201. In response to a determination signal of the effect of a target hump-shaped modified surface on heat transfer characteristics, initial geometric information and material property information of the target hump-shaped modified surface are obtained.

[0081] The initial geometric information includes an initial hump width, an initial hump spacing, an initial hump depth, an initial hump number, an initial surface length, and an initial surface width of the target hump-shaped modified surface.

[0082] Specifically, in order to simulate the heat transfer process of the target hump-shaped modified surface, it is first necessary to obtain geometric information such as the initial hump width, initial hump spacing, initial hump depth, initial hump number, initial surface length and initial surface width of the target hump-shaped modified surface, as well as obtain material property information.

[0083] 202. Based on the initial geometric information and material property information, a three-dimensional finite element model of the target hump-shaped modified surface is constructed, and the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model are set.

[0084] Specifically, after obtaining the initial geometric information and material property information of the target hump-shaped modified surface, a three-dimensional finite element model of the target hump-shaped modified surface is constructed based on the above initial geometric information and material property information using finite element software, and heat transfer boundary conditions such as temperature boundary conditions and pressure boundary conditions are set for the three-dimensional finite element model. At the same time, conditions such as the type of heat transfer medium also need to be set.

[0085] 203. Based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, the three-dimensional finite element model is controlled to carry out the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas, and the main convection heat transfer test results and the main critical heat flux test results under each main heat transfer surface area are obtained; and the three-dimensional finite element model is controlled to carry out the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas, and the secondary convection heat transfer test results and the secondary critical heat flux test results under each secondary heat transfer surface area are obtained, wherein the main convection heat transfer test results include: the main coefficient change trend of the convection heat transfer coefficient under different main heat transfer surface areas, the main critical heat flux test results include: the main density change trend of the critical heat flux under different main heat transfer surface areas, the secondary convection heat transfer test results include: the secondary coefficient change trend of the convection heat transfer coefficient under different secondary heat transfer surface areas, and the secondary critical heat flux test results include: the secondary density change trend of the critical heat flux under different secondary heat transfer surface areas.

[0086] Among them, the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-shaped modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-shaped modified surface.

[0087] For the embodiment of the present invention, in order to obtain different main heat transfer surface areas and different secondary heat transfer surface areas, the method includes: when the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial hump width remains unchanged, the initial hump spacing remains unchanged, the initial hump depth remains unchanged, and the initial hump number remains unchanged, controlling the change of the initial surface length and / or the change of the initial surface width to obtain different main heat transfer surface areas; when the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial surface length is the same, and the initial surface width is the same, controlling the change of at least one parameter among the initial hump width, the initial hump spacing, the initial hump depth, and the initial hump number to obtain different secondary heat transfer surface areas.

[0088] Specifically, when the total area of ​​the target hump-shaped modified surface is different, the total number of humps, the hump width, the hump spacing, and the hump depth are consistent, by controlling the change of at least one parameter of the surface length and the surface width of the target hump-shaped modified surface, the effect of the change of the main surface area on heat transfer under the same secondary surface area is achieved. Further, when the surface length and the surface width of the target hump-shaped modified surface are the same, by controlling the change of at least one parameter of the hump depth h, the hump width a1, a2, the hump depth h, and the number of humps, different secondary heat transfer surface areas are obtained, which are used to evaluate the contribution of the secondary heat transfer area to surface enhanced heat transfer.

[0089] Furthermore, different main heat transfer surface areas and different main heat transfer surface areas can be obtained by the above method, and then the three-dimensional finite element model is controlled to perform the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas respectively, and the main convection heat transfer test results and the main critical heat flux test results under each main heat transfer surface area are obtained, and the three-dimensional finite element model is controlled to perform the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas respectively, and the secondary convection heat transfer test results and the secondary critical heat flux test results under each secondary heat transfer surface area are obtained, that is, for the same heat transfer medium, the convection heat transfer test and the critical heat flux test of different surface areas are carried out, and the process of obtaining the test results includes: controlling the three-dimensional finite element model to perform the main convection heat transfer test under different main heat transfer surface areas, and during the main convection heat transfer test, Determine the main temperature distribution information and the main heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium; determine the main convection heat transfer coefficient under each main heat transfer surface area based on the main temperature distribution information and the main heat flow distribution information; control the three-dimensional finite element model to perform the main critical heat flux density test under different main heat transfer surface areas, wherein the method of the main critical heat flux density test includes: heating each main heat transfer surface with gradually increasing heating power, and during the heating process, recording the wall temperature of each main heat transfer surface in real time, and based on the wall temperature of each main heat transfer surface at each time, determining the target main heating power in which the heating rate of the wall temperature in each main heat transfer surface is greater than a preset threshold; based on the surface area of ​​each main heat transfer surface and the target main heating power, determine the main critical heat flux density under each main heat transfer surface area. At the same time, the three-dimensional finite element model is controlled to perform a secondary convection heat transfer test under different secondary heat transfer surface areas. During the secondary convection heat transfer test, the secondary temperature distribution information and the secondary heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium are determined; based on the secondary temperature distribution information and the secondary heat flow distribution information, the secondary convection heat transfer coefficient under each secondary heat transfer surface area is determined; the three-dimensional finite element model is controlled to perform a secondary critical heat flux density test under different secondary heat transfer surface areas, wherein the method of the secondary critical heat flux density test includes: heating each secondary heat transfer surface with a gradually increasing heating power, and during the heating process, recording the wall temperature of each secondary heat transfer surface in real time, and based on the wall temperature of each secondary heat transfer surface at each time, determining the target secondary heating power at which the heating rate of the wall temperature in each secondary heat transfer surface is greater than a preset threshold; based on the surface area of ​​each secondary heat transfer surface and the target secondary heating power, determining the secondary critical heat flux density under each secondary heat transfer surface area.

[0090] Specifically, in the main convection heat transfer test under each main heat transfer surface area (secondary heat transfer surface area), the temperature distribution information and heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium are determined respectively, that is, the wall temperature and the fluid (heat transfer medium) temperature of the target hump-shaped modified surface during the test are measured in real time to obtain the temperature distribution information, and the heat flow through the heat transfer surface is measured or calculated, and the heat flux density, that is, the heat exchanged between the solid surface per unit area and the fluid per unit time, is determined to obtain the heat flow distribution information, and finally the main convection heat transfer coefficient under the main heat transfer surface area and the secondary convection heat transfer coefficient under the secondary heat transfer surface area are determined by the following formula:

[0091]

[0092] Where h is the convective heat transfer coefficient, q is the heat flux, T w is the wall temperature of the target hump-shaped modified surface under different heat transfer surface areas obtained from the temperature distribution information, T f is the fluid temperature of the heat transfer medium under different heat transfer surface areas obtained from the heat flow distribution information.

[0093] Furthermore, during the main critical heat flux test, each main heat transfer surface (secondary heat transfer surface) is heated with gradually increasing heating power. During the heating process, the wall temperature of each main heat transfer surface (secondary heat transfer surface) is recorded in real time, and based on the wall temperature of each heat transfer surface at each time, the target heating power at which the heating rate of the wall temperature in each heat transfer surface is greater than a preset threshold (the preset threshold is set according to actual needs) is determined, and finally the main critical heat flux under each main heat transfer surface area and the secondary critical heat flux under each secondary heat transfer surface area are calculated according to the following formula:

[0094] q=PBA

[0095] Among them, q is the critical heat flux density (including the main critical heat flux density under each main heat transfer surface area, or the secondary critical heat flux density under each secondary heat transfer surface area), PB is the target main heating power at which the heating rate of the wall temperature in each main heat transfer surface is greater than a preset threshold, or the target secondary heating power at which the heating rate of the wall temperature in each secondary heat transfer surface is greater than a preset threshold, and A is the surface area of ​​each main heat transfer surface, or the surface area of ​​each secondary heat transfer surface. For example, when calculating the main critical heat flux density time under each main heat transfer surface area, PB is the target main heating power at which the heating rate of the wall temperature in each main heat transfer surface is greater than the preset threshold, and A is the surface area of ​​each main heat transfer surface. When calculating the secondary critical heat flux density time under each secondary heat transfer surface area, PB is the target secondary heating power at which the heating rate of the wall temperature in each secondary heat transfer surface is greater than the preset threshold, and A is the surface area of ​​each secondary heat transfer surface.

[0096] The embodiment of the present invention detects the temperature of the heated modified surface by a thermocouple, and calculates the convective heat transfer coefficient of the modified surface in combination with the temperature of the fluid at the temperature measurement location. During the main critical heat flux density test, the temperature of the heated modified surface is detected by a thermocouple. When the wall temperature at the modified surface begins to rise, the heating power at this time is the critical power, and the critical heat flux density is calculated. Through the above test results, the change trend of the convective heat transfer coefficient and the change trend of the critical heat flux density of the hump-type modified surface under different main heat transfer surface areas can be obtained, as well as the change trend of the convective heat transfer coefficient and the change trend of the critical heat flux density of the hump-type modified surface under different secondary heat transfer surface areas. Through various change trends, the influence of the surface area change of the hump-type modified surface on its heat transfer characteristics can be analyzed, and the heat transfer characteristics analysis can be more detailed.

[0097] 204. Input the main coefficient change trend and the main density change trend into the first preset heat transfer characteristic influence prediction model for influence prediction, and obtain the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0098] For the embodiment of the present invention, in order to improve the prediction accuracy of the first preset heat transfer characteristic influence prediction model, it is necessary to train and construct the model. Based on this, the method includes: constructing at least one initial heat transfer characteristic influence prediction model, and obtaining a sample data set, wherein the sample data set includes the variation trend of the main heat transfer coefficient of the sample hump-type modified surface with the main surface area of ​​different samples, and the actual effect of the change of the main heat transfer surface area of ​​the sample hump-type modified surface on the heat transfer characteristics of the sample hump-type modified surface; based on the number of models of the initial heat transfer characteristic influence prediction model, the sample data set is divided into a training data set and a test data set, the corresponding initial heat transfer characteristic influence prediction model is trained using the training data set, and the corresponding trained initial heat transfer characteristic influence prediction model is tested using the test data set, and based on the test results, the initial heat transfer characteristic influence prediction model that meets the test conditions is determined as the first preset heat transfer characteristic influence prediction model. Similarly, the second preset heat transfer characteristic influence prediction model can be trained and constructed. Furthermore, after constructing the first preset heat transfer characteristic influence prediction model, it is necessary to use the model to predict the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface. Based on this, step 204 specifically includes: determining the main coefficient eigenvector corresponding to the main coefficient change trend, and determining the main density eigenvector corresponding to the main density change trend; cross-processing the main coefficient eigenvector and the main density eigenvector to obtain the main cross eigenvector; inputting the main cross eigenvector into the first preset heat transfer characteristic influence prediction model for influence prediction to obtain the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0099] Specifically, the main coefficient feature vector corresponding to the main coefficient change trend is determined by word embedding or other methods, and the main density feature vector corresponding to the main density change trend is determined, and then the main coefficient feature vector and the main density feature vector are cross-processed. The specific cross-processing method includes: performing feature-level cross-processing on the main coefficient feature vector and the main density feature vector to obtain a feature cross-vector; performing element-level cross-processing on the main coefficient feature vector and the main density feature vector to obtain an element cross-vector; performing low-order cross-processing on the main coefficient feature vector and the main density feature vector to obtain a low-order cross-vector; combining the feature cross-vector, element cross-vector, and low-order cross-vector to obtain the main cross-feature vector. For example, in order to make full use of the relationship between data, extract more implicit features, and take into account both high-order and low-order processing, so that data utilization is more sufficient, the prediction results obtained later are more accurate, and meet the needs of actual application scenarios, it is necessary to cross-process the main coefficient feature vector and the main density feature vector. The specific cross-processing method is as follows: if the main coefficient feature vector is (a 1 ,a 2 ), the main density eigenvector is (b 1 ,b 2 ), the specific cross processing method includes: performing feature-level crossover between different feature vectors, that is, performing Hadamard product on all elements between vectors, and then performing convolution transformation under certain weights to obtain the feature crossover vector f(w*(a 1 *b 1 ,a 2 *b 2 )); At the same time, all feature vector data are cross-linked at the element level, that is, each element between the vectors is Hadamard-producted, and different weight values ​​are assigned to the results of each product, and then a linear transformation is performed. The obtained element cross-vector is f(w 1 *a 1 *b 1 ,w 2 *a 2 *b 2 ); In addition, all feature vectors are subjected to low-order cross processing, and then weight coefficients are assigned to the results of the cross processing, and then linear transformation is performed, and the low-order cross vector obtained is f(w 2 (a 1 ,a 2 ,b 1 ,b 2)); finally, the above feature cross vectors, element cross vectors, and low-order cross vectors are combined together, such as horizontal splicing, to obtain the main cross feature vector. It should be noted that the above examples are only illustrative and do not limit the embodiments of the present application. Therefore, by cross-processing the main coefficient feature vector and the main density feature vector, different features can be automatically or explicitly combined to generate new feature combinations. These combined features may contain complex nonlinear relationships between the original features, so that the model can capture more detailed and rich information in the data, that is, it can make full use of the relationship between various data, extract more implicit features, and take into account both high-order and low-order processing, so that data utilization is more sufficient, and the modified surface area obtained later on The influence of the heat transfer characteristics is determined more accurately to meet the needs of actual application scenarios.

[0100] 205. Input the secondary coefficient change trend and the secondary density change trend into the second preset heat transfer characteristic influence prediction model for influence prediction, and obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0101] For the embodiment of the present invention, after training and constructing the second preset heat transfer characteristic influence prediction model with higher accuracy, it is necessary to use the model to predict the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface. Based on this, step 205 specifically includes: determining the secondary coefficient eigenvector corresponding to the secondary coefficient change trend, and determining the secondary density eigenvector corresponding to the secondary density change trend; cross-processing the secondary coefficient eigenvector and the secondary density eigenvector to obtain a secondary cross eigenvector; inputting the secondary cross eigenvector into the second preset heat transfer characteristic influence prediction model for influence prediction, and obtaining the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0102] Specifically, the secondary coefficient feature vector corresponding to the change trend of the secondary coefficient is determined by word embedding or other methods, and the secondary density feature vector corresponding to the change trend of the secondary density is determined, and then the secondary coefficient feature vector and the secondary density feature vector are cross-processed. The specific cross-processing method includes: performing feature-level cross-processing on the secondary coefficient feature vector and the secondary density feature vector to obtain a feature cross-vector; performing element-level cross-processing on the secondary coefficient feature vector and the secondary density feature vector to obtain an element cross-vector; performing low-order cross-processing on the secondary coefficient feature vector and the secondary density feature vector to obtain a low-order cross-vector; combining the feature cross-vector, the element cross-vector, and the low-order cross-vector to obtain the secondary cross-feature vector. For example, in order to make full use of the relationship between data, extract more implicit features, and take into account both high-order and low-order processing, so that data utilization is more sufficient, the prediction results obtained later are more accurate, and meet the needs of actual application scenarios, it is necessary to cross-process the secondary coefficient feature vector and the secondary density feature vector. The specific cross-processing method is as follows: if the secondary coefficient feature vector is (a 1 ,a 2 ), the secondary density eigenvector is (b 1 ,b 2 ), the specific cross processing method includes: performing feature-level crossover between different feature vectors, that is, performing Hadamard product on all elements between vectors, and then performing convolution transformation under certain weights to obtain the feature crossover vector f(w*(a 1 *b 1 ,a 2 *b 2 )); At the same time, all feature vector data are cross-linked at the element level, that is, each element between the vectors is Hadamard-producted, and different weight values ​​are assigned to the results of each product, and then a linear transformation is performed. The obtained element cross-vector is f(w 1 *a 1 *b 1 ,w 2 *a 2 *b 2 ); In addition, all feature vectors are subjected to low-order cross processing, and then weight coefficients are assigned to the results of the cross processing, and then linear transformation is performed, and the low-order cross vector obtained is f(w 2 (a 1 ,a 2 ,b 1 ,b 2)); finally, the above feature cross vectors, element cross vectors, and low-order cross vectors are combined together, such as horizontal splicing, to obtain a secondary cross feature vector. It should be noted that the above examples are only illustrative and do not limit the embodiments of the present application. Therefore, by cross-processing the secondary coefficient feature vector and the secondary density feature vector, different features can be automatically or explicitly combined to generate new feature combinations. These combined features may contain complex nonlinear relationships between the original features, so that the model can capture more detailed and rich information in the data, that is, it can make full use of the relationship between various data, extract more implicit features, and take into account both high-order and low-order processing, so that data utilization is more sufficient, and the modified surface area obtained later on The way in which the heat transfer characteristics are affected is determined more accurately to meet the needs of actual application scenarios.

[0103] According to another method for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided by the present invention, compared with the current method of determining the influence of a modified surface on heat transfer characteristics by manually observing the changes in hot spots on a hump-shaped modified surface, the present invention constructs a three-dimensional finite element analysis model of a target hump-shaped modified surface, and based on the three-dimensional finite element analysis model, performs a main convection heat transfer test and a main critical heat flux density test on the target hump-shaped modified surface under different main heat transfer surface areas, and performs a secondary convection heat transfer test and a secondary critical heat flux density test on the target hump-shaped modified surface under different secondary heat transfer surface areas, and finally determines the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the results of each test, thereby determining the modified surface by performing a simulation test on the hump-shaped modified surface. The influence of surface area on its heat transfer characteristics. Since the simulation test does not require the use of high temperature, high pressure or toxic and hazardous substances, the safety risks in the test process are reduced, and the problem of low accuracy in determining the influence of heat transfer characteristics caused by manual observation of hot spot changes can be avoided. At the same time, the present invention separately analyzes the influence of area changes of the main heat transfer surface and the secondary heat transfer surface of the hump-type modified surface on its heat transfer characteristics, so that the analysis of the influence of heat transfer characteristics is more detailed. In addition, the present invention determines the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics through a comprehensive analysis of the convective heat transfer and critical heat flux density of the hump-type modified surface, thereby avoiding the situation where the influence mode is judged incorrectly based on the change of red spots. Therefore, the present invention can improve the accuracy of determining the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics.

[0104] Further, as Figure 1 In a specific implementation, an embodiment of the present invention provides a device for determining the influence of a hump-shaped modified surface on heat transfer characteristics, such as Figure 5 As shown, the device includes: an acquisition unit 31, a construction unit 32, a test unit 33 and a determination unit 34.

[0105] The acquisition unit 31 can be used to respond to a determination signal of the way in which the target hump-shaped modified surface affects the heat transfer characteristics, and acquire the initial geometric information of the target hump-shaped modified surface, wherein the initial geometric information includes the initial hump width, initial hump spacing, initial hump depth, initial hump number, initial surface length and initial surface width of the target hump-shaped modified surface, as well as material property information of the target hump-shaped modified surface.

[0106] The construction unit 32 can be used to construct a three-dimensional finite element model of the target hump-shaped modified surface based on the initial geometric information and the material property information, and set the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model.

[0107] The test unit 33 can be used to control the three-dimensional finite element model to perform the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, and obtain the main convection heat transfer test results and the main critical heat flux test results under each of the main heat transfer surface areas, and control the three-dimensional finite element model to perform the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas, and obtain the secondary convection heat transfer test results and the secondary critical heat flux test results under each of the secondary heat transfer surface areas, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface.

[0108] The determination unit 34 can be used to determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results.

[0109] In specific application scenarios, in order to obtain different primary heat transfer surface areas and different secondary heat transfer surface areas, such as Figure 6 As shown, the device further includes: a control unit 35.

[0110] The control unit 35 can be used to control the change of the initial surface length and / or the change of the initial surface width to obtain different main heat transfer surface areas when the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial hump width remains unchanged, the initial hump spacing remains unchanged, the initial hump depth remains unchanged, and the initial hump number remains unchanged.

[0111] The control unit 35 can also be used to control the change of at least one parameter among the initial hump width, the initial hump spacing, the initial hump depth, and the initial hump number when the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial surface length is the same, and the initial surface width is the same, so as to obtain different secondary heat transfer surface areas.

[0112] In a specific application scenario, in order to conduct a main convective heat transfer test and a main critical heat flux density test, the test unit 33 includes a control module 331 and a determination module 332 .

[0113] The control module 331 can be used to control the three-dimensional finite element model to perform a main convection heat transfer test under different main heat transfer surface areas. During the main convection heat transfer test, the main temperature distribution information and the main heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium are determined.

[0114] The determination module 332 may be configured to determine the main convective heat transfer coefficient under each of the main heat transfer surface areas based on the main temperature distribution information and the main heat flux distribution information.

[0115] The control module 331 can also be used to control the three-dimensional finite element model to perform a main critical heat flux density test under different main heat transfer surface areas, wherein the method of the main critical heat flux density test includes: heating each of the main heat transfer surfaces with a gradually increasing heating power, and during the heating process, recording the wall temperature of each of the main heat transfer surfaces in real time, and based on the wall temperature of each of the main heat transfer surfaces at each time, determining the target main heating power in which the heating rate of the wall temperature in each of the main heat transfer surfaces is greater than a preset threshold.

[0116] The determination module 332 may also be used to determine the main critical heat flux density under each of the main heat transfer surface areas based on the surface area of ​​each of the main heat transfer surfaces and the target main heating power.

[0117] In a specific application scenario, in order to conduct secondary convection heat transfer tests and secondary critical heat flux density tests, the control module 331 can also be used to control the three-dimensional finite element model to conduct secondary convection heat transfer tests under different secondary heat transfer surface areas. During the secondary convection heat transfer test, the secondary temperature distribution information and secondary heat flux distribution information between the target hump-shaped modified surface and the heat transfer medium are determined.

[0118] The determination module 332 may also be used to determine the secondary convection heat transfer coefficient for each secondary heat transfer surface area based on the secondary temperature distribution information and the secondary heat flux distribution information.

[0119] The control module 331 can also be used to control the three-dimensional finite element model to perform secondary critical heat flux density tests under different secondary heat transfer surface areas, wherein the method of the secondary critical heat flux density test includes: heating each of the secondary heat transfer surfaces with gradually increasing heating power, and during the heating process, recording the wall temperature of each of the secondary heat transfer surfaces in real time, and based on the wall temperature of each of the secondary heat transfer surfaces at each time, determining the target secondary heating power at which the heating rate of the wall temperature in each of the secondary heat transfer surfaces is greater than a preset threshold.

[0120] The determination module 332 may also be used to determine the secondary critical heat flux density under each secondary heat transfer surface area based on the surface area of ​​each secondary heat transfer surface and the target secondary heating power.

[0121] In a specific application scenario, in order to determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface, the determination unit 34 includes a judgment module 341 and a determination module 342 .

[0122] The judgment module 341 can be used to judge whether the main convection heat transfer coefficient under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area based on the main convection heat transfer test results.

[0123] The judgment module 341 can also be used to judge whether the main critical heat flux density under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area based on the main critical heat flux density test results.

[0124] The determination module 342 can be used to determine that an increase in the main heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface if the main convection heat transfer coefficient increases with an increase in the corresponding main heat transfer surface area, and the main critical heat flux increases with an increase in the corresponding main heat transfer surface area.

[0125] The judgment module 341 can also be used to judge whether the secondary convection heat transfer coefficient under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area based on the secondary convection heat transfer test results.

[0126] The judgment module 341 can also be used to judge whether the secondary critical heat flux density under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area based on the secondary critical heat flux density test result.

[0127] The determination module 342 can also be used to determine that an increase in the secondary heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface if the secondary convection heat transfer coefficient increases with an increase in the corresponding secondary heat transfer surface area, and the secondary critical heat flux increases with an increase in the corresponding secondary heat transfer surface area.

[0128] In a specific application scenario, the main convective heat transfer test results include: the main coefficient change trend of the convective heat transfer coefficient under different main heat transfer surface areas, the main critical heat flux density test results include: the main density change trend of the critical heat flux density under different main heat transfer surface areas, the secondary convective heat transfer test results include: the secondary coefficient change trend of the convective heat transfer coefficient under different secondary heat transfer surface areas, the secondary critical heat flux density test results include: the secondary density change trend of the critical heat flux density under different secondary heat transfer surface areas. In order to determine the influence of the surface area of ​​the target hump-type modified surface on the heat transfer characteristics of the modified surface, the determination unit 34 also includes a prediction module 343.

[0129] The prediction module 343 can be used to input the main coefficient change trend and the main density change trend into the first preset heat transfer characteristic influence prediction model for influence prediction, and obtain the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0130] The prediction module 343 can also be used to input the secondary coefficient change trend and the secondary density change trend into the second preset heat transfer characteristic influence prediction model for influence prediction, so as to obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

[0131] In a specific application scenario, in order to determine the change in the main heat transfer surface area and the influence of the change in the main heat transfer surface area on the heat transfer characteristics of the target hump-type modified surface, the prediction module 343 can be specifically used to determine the main coefficient eigenvector corresponding to the main coefficient change trend, and determine the main density eigenvector corresponding to the main density change trend; cross-process the main coefficient eigenvector and the main density eigenvector to obtain the main cross eigenvector; input the main cross eigenvector into the first preset heat transfer characteristic influence prediction model for influence prediction, and obtain the influence of the change in the main heat transfer surface area of ​​the target hump-type modified surface on the heat transfer characteristics of the target hump-type modified surface.

[0132] The prediction module 343 can be specifically used to determine the secondary coefficient eigenvector corresponding to the secondary coefficient change trend, and determine the secondary density eigenvector corresponding to the secondary density change trend; cross-process the secondary coefficient eigenvector and the secondary density eigenvector to obtain a secondary cross eigenvector; input the secondary cross eigenvector into the second preset heat transfer characteristic influence prediction model for influence prediction, and obtain the influence of the change in the secondary heat transfer surface area of ​​the target hump-type modified surface on the heat transfer characteristics of the target hump-type modified surface.

[0133] It should be noted that for other corresponding descriptions of the functional modules involved in the device for determining the influence of a hump-shaped modified surface on heat transfer characteristics provided in an embodiment of the present invention, reference can be made to Figure 1 The corresponding description of the method shown will not be repeated here.

[0134] Based on the above Figure 1 The method shown, accordingly, the embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented: in response to a determination signal of the influence of the target hump-shaped modified surface on the heat transfer characteristics, the initial geometric information of the target hump-shaped modified surface is obtained, wherein the initial geometric information includes the initial hump width, initial hump spacing, initial hump depth, initial hump number, initial surface length and initial surface width of the target hump-shaped modified surface, and the material property information of the target hump-shaped modified surface; based on the initial geometric information and the material property information, a three-dimensional finite element model of the target hump-shaped modified surface is constructed, and the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model are set; based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, the three-dimensional finite element model is controlled to perform the main heat transfer under different main heat transfer surface areas respectively. The method comprises the following steps: conducting a heat transfer test and a main critical heat flux density test to obtain the main convection heat transfer test results and the main critical heat flux density test results under each of the main heat transfer surface areas, and controlling the three-dimensional finite element model to respectively conduct secondary convection heat transfer tests and secondary critical heat flux density tests under different secondary heat transfer surface areas to obtain the secondary convection heat transfer test results and secondary critical heat flux density test results under each of the secondary heat transfer surface areas, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface; based on the main convection heat transfer test results, the main critical heat flux density test results, the secondary convection heat transfer test results, and the secondary critical heat flux density test results, the influence of the surface area of ​​the target hump-type modified surface on the heat transfer characteristics of the modified surface is determined.

[0135] Based on the above Figure 1 The method shown and Figure 5 The embodiment of the device shown in the figure, the embodiment of the present invention also provides a physical structure diagram of a computer device, such as Figure 7 As shown, the computer device includes: a processor 41, a memory 42, and a computer program stored in the memory 42 and executable on the processor, wherein the memory 42 and the processor 41 are both arranged on a bus 43, and when the processor 41 executes the program, the following steps are implemented: in response to a determination signal of the influence of the target hump-shaped modified surface on the heat transfer characteristics, initial geometric information of the target hump-shaped modified surface is obtained, wherein the initial geometric information includes the initial hump width, initial hump spacing, initial hump depth, initial hump number, initial surface length and initial surface width of the target hump-shaped modified surface, and material property information of the target hump-shaped modified surface; based on the initial geometric information and the material property information, a three-dimensional finite element model of the target hump-shaped modified surface is constructed, and the heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model are set; based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, the three-dimensional finite element model is controlled to be respectively Conducting main convection heat transfer tests and main critical heat flux density tests under different main heat transfer surface areas, obtaining main convection heat transfer test results and main critical heat flux density test results under each of the main heat transfer surface areas, and controlling the three-dimensional finite element model to respectively conduct secondary convection heat transfer tests and secondary critical heat flux density tests under different secondary heat transfer surface areas, obtaining secondary convection heat transfer test results and secondary critical heat flux density test results under each of the secondary heat transfer surface areas, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface onto the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface; based on the main convection heat transfer test results, the main critical heat flux density test results, the secondary convection heat transfer test results, and the secondary critical heat flux density test results, determine the influence of the surface area of ​​the target hump-type modified surface on the heat transfer characteristics of the modified surface.

[0136] Through the technical solution of the present invention, the present invention constructs a three-dimensional finite element analysis model of the target hump-shaped modified surface, and based on the three-dimensional finite element analysis model, performs a main convection heat transfer test and a main critical heat flux density test on the target hump-shaped modified surface under different main heat transfer surface areas, and performs a secondary convection heat transfer test and a secondary critical heat flux density test on the target hump-shaped modified surface under different secondary heat transfer surface areas, and finally determines the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface according to the results of each test, thereby determining the influence of the surface area of ​​the modified surface on its heat transfer characteristics by performing a simulation test on the hump-shaped modified surface, because the simulation test does not require the use of high temperature, high pressure or toxic and organic Harmful substances are removed, thereby reducing the safety risks during the test, and the problem of low accuracy in determining the influence mode of heat transfer characteristics caused by artificial observation of hot spot changes can be avoided. At the same time, the present invention respectively analyzes the influence of the area changes of the main heat transfer surface and the secondary heat transfer surface of the hump-type modified surface on its heat transfer characteristics, so that the analysis of the influence mode of heat transfer characteristics is more detailed. In addition, the present invention determines the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics through a comprehensive analysis of the convective heat transfer and the critical heat flux density of the hump-type modified surface, thereby avoiding the situation where the influence mode is judged incorrectly based on the change of red spots, so that the present invention can improve the accuracy of determining the influence of the surface area of ​​the hump-type modified surface on its heat transfer characteristics.

[0137] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0138] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the influence of a hump-shaped modified surface on heat transfer characteristics, characterized in that: include: In response to a determination signal of the effect of the target hump-shaped modified surface on the heat transfer characteristics, initial geometric information of the target hump-shaped modified surface is acquired, wherein the initial geometric information includes an initial hump width, an initial hump spacing, an initial hump depth, an initial hump number, an initial surface length and an initial surface width of the target hump-shaped modified surface, and material property information of the target hump-shaped modified surface; Based on the initial geometric information and the material property information, construct a three-dimensional finite element model of the target hump-shaped modified surface, and set heat transfer boundary conditions and heat transfer medium type conditions of the three-dimensional finite element model; Based on the same heat transfer boundary condition and the same heat transfer medium type condition, the three-dimensional finite element model is controlled to respectively perform the main convection heat transfer test and the main critical heat flux test under different main heat transfer surface areas, and the main convection heat transfer test results and the main critical heat flux test results under each of the main heat transfer surface areas are obtained; and the three-dimensional finite element model is controlled to respectively perform the secondary convection heat transfer test and the secondary critical heat flux test under different secondary heat transfer surface areas, and the secondary convection heat transfer test results and the secondary critical heat flux test results under each of the secondary heat transfer surface areas are obtained, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface to the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface; Based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results, the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface is determined.

2. The method according to claim 1, characterized in that Before controlling the three-dimensional finite element model to respectively perform a main convection heat transfer test and a main critical heat flux density test under different main heat transfer surface areas, the method further includes: Under the condition that the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial hump width is unchanged, the initial hump spacing is unchanged, the initial hump depth is unchanged, and the initial hump number is unchanged, the change of the initial surface length and / or the change of the initial surface width is controlled to obtain different main heat transfer surface areas; Before controlling the three-dimensional finite element model to respectively perform a secondary convection heat transfer test and a secondary critical heat flux test under different secondary heat transfer surface areas, the method further includes: When the hump top surface of the target hump-shaped modified surface is in the same direction as the flow direction of the heat transfer medium, the initial surface length is the same, and the initial surface width is the same, at least one parameter among the initial hump width, the initial hump spacing, the initial hump depth, and the initial hump number is controlled to obtain different secondary heat transfer surface areas.

3. The method according to claim 1, characterized in that The controlling the three-dimensional finite element model to respectively perform the main convection heat transfer test and the main critical heat flux density test under different main heat transfer surface areas, and obtaining the main convection heat transfer test results and the main critical heat flux density test results under each of the main heat transfer surface areas, including: Controlling the three-dimensional finite element model to perform a main convection heat transfer test under different main heat transfer surface areas, and determining the main temperature distribution information and the main heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium during the main convection heat transfer test; Determining a main convection heat transfer coefficient under each of the main heat transfer surface areas based on the main temperature distribution information and the main heat flow distribution information; Controlling the three-dimensional finite element model to perform a main critical heat flux density test under different main heat transfer surface areas, wherein the method of the main critical heat flux density test comprises: heating each of the main heat transfer surfaces with gradually increasing heating power, during the heating process, recording the wall temperature of each of the main heat transfer surfaces in real time, and determining a target main heating power in which the heating rate of the wall temperature in each of the main heat transfer surfaces is greater than a preset threshold value based on the wall temperature of each of the main heat transfer surfaces at each time; Based on the surface area of ​​each of the main heat transfer surfaces and the target main heating power, the main critical heat flux density under each of the main heat transfer surface areas is determined.

4. The method according to claim 1, characterized in that: The controlling the three-dimensional finite element model to respectively perform secondary convection heat transfer tests and secondary critical heat flux density tests under different secondary heat transfer surface areas, and obtaining secondary convection heat transfer test results and secondary critical heat flux density test results under each of the secondary heat transfer surface areas, includes: Controlling the three-dimensional finite element model to perform a secondary convection heat transfer test under different secondary heat transfer surface areas, and determining secondary temperature distribution information and secondary heat flow distribution information between the target hump-shaped modified surface and the heat transfer medium during the secondary convection heat transfer test; Determining a secondary convective heat transfer coefficient for each secondary heat transfer surface area based on the secondary temperature distribution information and the secondary heat flux distribution information; Controlling the three-dimensional finite element model to perform a secondary critical heat flux density test under different secondary heat transfer surface areas, wherein the method of the secondary critical heat flux density test comprises: heating each of the secondary heat transfer surfaces with gradually increasing heating power, during the heating process, recording the wall temperature of each of the secondary heat transfer surfaces in real time, and determining, based on the wall temperature of each of the secondary heat transfer surfaces at each time, a target secondary heating power at which the heating rate of the wall temperature in each of the secondary heat transfer surfaces is greater than a preset threshold; Based on the surface area of ​​each of the secondary heat transfer surfaces and the target secondary heating power, the secondary critical heat flux density under each of the secondary heat transfer surface areas is determined.

5. The method according to claim 1, characterized in that: The determining of the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results comprises: Based on the main convection heat transfer test results, determine whether the main convection heat transfer coefficient under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area; and / or, Based on the main critical heat flux test results, judging whether the main critical heat flux under each main heat transfer surface area increases with the increase of the corresponding main heat transfer surface area; If the main convection heat transfer coefficient increases with the increase of the corresponding main heat transfer surface area, and the main critical heat flux increases with the increase of the corresponding main heat transfer surface area, it is determined that the increase of the main heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface; Based on the secondary convection heat transfer test results, determine whether the secondary convection heat transfer coefficient under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area; and / or, Based on the secondary critical heat flux test results, determining whether the secondary critical heat flux under each secondary heat transfer surface area increases with the increase of the corresponding secondary heat transfer surface area; If the secondary convective heat transfer coefficient increases with the increase of the corresponding secondary heat transfer surface area, and the secondary critical heat flux density increases with the increase of the corresponding secondary heat transfer surface area, it is determined that the increase of the secondary heat transfer surface area of ​​the target hump-shaped modified surface will enhance the heat transfer characteristics of the target hump-shaped modified surface.

6. The method according to claim 1, characterized in that The main convection heat transfer test results include: the main coefficient change trend of the convection heat transfer coefficient under different main heat transfer surface areas, the main critical heat flux test results include: the main density change trend of the critical heat flux under different main heat transfer surface areas, the secondary convection heat transfer test results include: the secondary coefficient change trend of the convection heat transfer coefficient under different secondary heat transfer surface areas, the secondary critical heat flux test results include: the secondary density change trend of the critical heat flux under different secondary heat transfer surface areas; The determining of the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux test results, the secondary convection heat transfer test results, and the secondary critical heat flux test results comprises: Inputting the main coefficient change trend and the main density change trend into a first preset heat transfer characteristic influence prediction model for influence prediction, and obtaining the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface; The secondary coefficient change trend and the secondary density change trend are input into the second preset heat transfer characteristic influence prediction model for influence prediction, so as to obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

7. The method according to claim 6, characterized in that The inputting the main coefficient change trend and the main density change trend into the first preset heat transfer characteristic influence prediction model to perform influence prediction, and obtaining the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface, includes: Determine the main coefficient eigenvector corresponding to the main coefficient change trend, and determine the main density eigenvector corresponding to the main density change trend; Cross-processing the main coefficient eigenvector and the main density eigenvector to obtain a main cross eigenvector; Inputting the main cross-eigenvector into the first preset heat transfer characteristic influence prediction model to perform influence prediction, and obtaining the influence of the change of the main heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface; The inputting the secondary coefficient change trend and the secondary density change trend into the second preset heat transfer characteristic influence prediction model for influence prediction, and obtaining the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface, includes: Determine a secondary coefficient eigenvector corresponding to the secondary coefficient variation trend, and determine a secondary density eigenvector corresponding to the secondary density variation trend; Cross-processing the secondary coefficient eigenvector and the secondary density eigenvector to obtain a secondary cross-eigenvector; The secondary cross-eigenvector is input into the second preset heat transfer characteristic influence prediction model for influence prediction, so as to obtain the influence of the change of the secondary heat transfer surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the target hump-shaped modified surface.

8. A device for determining the influence of a hump-shaped modified surface on heat transfer characteristics, characterized in that: include: an acquisition unit, configured to acquire initial geometric information of the target hump-shaped modified surface in response to a determination signal of the influence of the target hump-shaped modified surface on the heat transfer characteristics, wherein the initial geometric information includes an initial hump width, an initial hump spacing, an initial hump depth, an initial hump number, an initial surface length and an initial surface width of the target hump-shaped modified surface, and material property information of the target hump-shaped modified surface; A construction unit, configured to construct a three-dimensional finite element model of the target hump-shaped modified surface based on the initial geometric information and the material property information, and to set a heat transfer boundary condition and a heat transfer medium type condition of the three-dimensional finite element model; A test unit, for controlling the three-dimensional finite element model to respectively perform a main convection heat transfer test and a main critical heat flux test under different main heat transfer surface areas based on the same heat transfer boundary conditions and the same heat transfer medium type conditions, and obtaining the main convection heat transfer test results and the main critical heat flux test results under each of the main heat transfer surface areas, and controlling the three-dimensional finite element model to respectively perform a secondary convection heat transfer test and a secondary critical heat flux test under different secondary heat transfer surface areas, and obtaining the secondary convection heat transfer test results and the secondary critical heat flux test results under each of the secondary heat transfer surface areas, wherein the main heat transfer surface area refers to the sum of the area obtained by projecting each hump in the target hump-type modified surface onto the hump bottom surface and the non-hump bottom area, and the secondary heat transfer surface area refers to the sum of the side areas of each hump in the target hump-type modified surface; A determination unit is used to determine the influence of the surface area of ​​the target hump-shaped modified surface on the heat transfer characteristics of the modified surface based on the primary convection heat transfer test results, the primary critical heat flux density test results, the secondary convection heat transfer test results, and the secondary critical heat flux density test results.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images