A solid thermal conductivity coupling calculation method

Abstract

The present application discloses a solid thermal conduction coupling calculation method, which belongs to the field of temperature simulation technology, including: calculating the initial values ​​of the temperature and pressure of the internal flow pipe network in the turbine blade; calculating the temperature and heat transfer coefficient of the internal coupling unit surface according to the initial values ​​of the temperature and pressure; calculating the heat flow of the internal coupling unit surface according to the temperature and heat transfer coefficient; and performing coupled iterative solution of the temperature and pressure of the internal flow pipe network according to the heat flow until the temperature and pressure obtained by the solution reach the preset conditions, and obtaining the final values ​​of the temperature and pressure of the internal flow pipe network. The method provided by the present application is applied to the calculation of the cold air outlet temperature of the internal flow pipe network in the turbine blade, and can provide more accurate and more realistic temperature calculation results.

Description

Technical Field

[0001] The present application relates to a solid thermal conductivity coupling calculation method, belonging to the technical field of temperature simulation. Background Art

[0002] The existing temperature algorithm in this field is to calculate the composite heat transfer coefficient, that is, to calculate the external heat transfer, blade solid heat conduction, and internal cold air heat transfer to obtain the temperature and heat transfer coefficient of the internal cold air and other characteristics. However, on the one hand, the method of calculating the composite heat transfer coefficient is an empirical method, and its accuracy is affected by many factors, including the accuracy of the heat transfer model, the selection of parameters, etc.; on the other hand, this method usually simplifies the processes of external heat transfer, blade solid heat conduction, and internal cold air heat transfer into an overall heat transfer coefficient, which may ignore some details and local characteristics. Therefore, when this method is used to calculate the temperature, the accuracy of the calculation result is limited, and there may be a certain deviation from the actual situation. Summary of the invention

[0003] The purpose of this application is to provide a solid thermal conduction coupling calculation method, which can provide more accurate and realistic temperature calculation results by coupling and iteratively solving the temperature and pressure of the internal flow pipe network through heat flow, help optimize the pipe network design and improve the efficiency of heat transfer scheme design.

[0004] To achieve the above objectives, the present application provides a solid thermal conductivity coupling calculation method in a first aspect, comprising:

[0005] Calculate the initial values ​​of temperature and pressure of the internal flow network in the turbine blades;

[0006] Calculate the temperature and heat transfer coefficient of the internal coupling unit surface based on the initial values ​​of temperature and pressure;

[0007] Calculate the heat flux on the internal coupling unit surface based on the temperature and heat transfer coefficient;

[0008] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet preset conditions, thereby obtaining final values ​​of the temperature and pressure of the internal flow network.

[0009] In one embodiment, the calculating of the initial values ​​of the temperature and pressure of the internal flow network includes:

[0010] The initial values ​​of the temperature and pressure of the internal flow network are calculated based on the boundary conditions of the turbine blades and the grid information of the turbine blade geometry.

[0011] In one embodiment, the initial values ​​of the temperature and pressure of the internal flow network are calculated based on the boundary conditions of the turbine blades and the grid information of the geometry of the turbine blades, including:

[0012] Parametric modeling of turbine blades is performed according to design parameters to obtain a calculation model;

[0013] Obtain the boundary conditions of the turbine blades, divide the grid according to the calculation model, and obtain the grid information of the turbine blade geometry;

[0014] The temperature and pressure of the internal flow network are iteratively calculated according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry, and the converged calculation results are used as the initial values ​​of the temperature and pressure.

[0015] In one embodiment, obtaining the boundary conditions of the turbine blades includes:

[0016] The heat flux density and the near-wall temperature are obtained by numerically calculating the fluid domain in the turbine blade, and the heat flux density and the near-wall temperature flow are transferred to the solid domain as boundary conditions of the solid domain in the turbine blade.

[0017] In one embodiment, transferring the heat flux and near-wall temperature flow to the solid domain comprises:

[0018] The heat flux density and the near-wall temperature flow are transferred to the solid domain by an interpolation method at the fluid-solid interface between the fluid domain and the solid domain. In one embodiment, the temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flux until the solved temperature and pressure meet the preset conditions, including:

[0019] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure converge, and the converged solution results are used as the final values ​​of the temperature and pressure.

[0020] In one embodiment, the temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet preset conditions, including:

[0021] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the number of iteration steps reaches a preset value, and the solution result when the number of iteration steps reaches the preset value is used as the final value of the temperature and pressure.

[0022] A second aspect of the present application provides a solid thermal conductivity coupling calculation system, comprising:

[0023] An initial value calculation module is used to calculate the initial values ​​of the temperature and pressure of the internal flow pipe network in the turbine blade;

[0024] Temperature calculation module, used to calculate the temperature and heat transfer coefficient of the internal coupling unit surface according to the initial values ​​of temperature and pressure;

[0025] Solid thermal conductivity calculation module, used to calculate the heat flow of the internal coupling unit surface based on temperature and heat transfer coefficient;

[0026] The coupled iterative module is used to perform coupled iterative solutions to the temperature and pressure of the internal flow network according to the heat flow, until the temperature and pressure obtained by the solution meet preset conditions, thereby obtaining the final values ​​of the temperature and pressure of the internal flow network.

[0027] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the first aspect or any one of the embodiments of the first aspect when executing the computer program.

[0028] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the first aspect or any one of the embodiments of the first aspect are implemented.

[0029] As can be seen from the above, the present application provides a solid thermal conduction coupling calculation method, which can be applied to the calculation of the cold air outlet temperature of the internal flow network in the turbine blades. The internal flow network temperature and pressure are coupled and iteratively solved by heat flow, which can take into account various actual conditions in the pipeline network, more realistically reflect the temperature distribution of the cold air in the pipeline network, provide more accurate and realistic temperature calculation results, and help optimize the pipeline network design and improve the efficiency of heat transfer scheme design. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A logic block diagram of a solid thermal conductivity coupling calculation method provided in an embodiment of the present application;

[0032] Figure 2 A schematic diagram of an interface for solid thermal conductivity coupling calculation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0034] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0035] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0036] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] Embodiment 1

[0039] The present application embodiment provides a solid thermal conductivity coupling calculation method, such as Figure 1 As shown, the method includes:

[0040] Calculate the initial values ​​of temperature and pressure of the internal flow network in the turbine blades;

[0041] Calculate the temperature and heat transfer coefficient of the internal coupling unit surface based on the initial values ​​of temperature and pressure;

[0042] Calculate the heat flux on the internal coupling unit surface based on the temperature and heat transfer coefficient;

[0043] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet preset conditions, thereby obtaining final values ​​of the temperature and pressure of the internal flow network.

[0044] In one embodiment, the calculating of the initial values ​​of the temperature and pressure of the internal flow network includes:

[0045] The initial values ​​of the temperature and pressure of the internal flow network are calculated based on the boundary conditions of the turbine blades and the grid information of the turbine blade geometry.

[0046] In one embodiment, the initial values ​​of the temperature and pressure of the internal flow network are calculated based on the boundary conditions of the turbine blades and the grid information of the geometry of the turbine blades, including:

[0047] Parametric modeling of turbine blades is performed according to design parameters to obtain a calculation model;

[0048] Obtain the boundary conditions of the turbine blades, divide the grid according to the calculation model, and obtain the grid information of the turbine blade geometry;

[0049] The temperature and pressure of the internal flow network are iteratively calculated according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry, and the converged calculation results are used as the initial values ​​of the temperature and pressure.

[0050] In one embodiment, obtaining the boundary conditions of the turbine blades includes:

[0051] The heat flux density and the near-wall temperature are obtained by numerically calculating the fluid domain in the turbine blade, and the heat flux density and the near-wall temperature flow are transferred to the solid domain as boundary conditions of the solid domain in the turbine blade.

[0052] In one embodiment, transferring the heat flux and near-wall temperature flow to the solid domain comprises:

[0053] The heat flux density and near-wall temperature flow are transferred to the solid domain through an interpolation method at the fluid-solid interface between the fluid domain and the solid domain.

[0054] In one embodiment, when performing coupled calculations, the fluid domain and the solid domain are solved separately. First, numerical calculations are performed in the fluid domain to obtain numerical results of heat flux density and near-wall temperature. Then the data in the fluid domain is transferred to the fluid-solid interface by interpolation. In the fluid domain, numerical calculations can also be performed using fluid mechanics equations and heat conduction equations to obtain the distribution of flow field and temperature field, and then calculate the heat flux density and near-wall temperature. Among them, the interpolation method can interpolate the data in the fluid domain to the corresponding position of the solid domain according to the grid structure of the fluid domain and the solid domain. In the solid domain, numerical calculations can be performed using heat conduction equations and other methods, and the data transferred in the fluid domain is used as the initial boundary condition, combined with the grid information of the geometry of the turbine blades to obtain the temperature and pressure distribution in the solid domain. This method can realize the coupled calculation of the fluid domain and the solid domain, and more accurately simulate the heat transfer process between the fluid and the solid.

[0055] In one embodiment, the temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet preset conditions, including:

[0056] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure converge, and the converged solution results are used as the final values ​​of the temperature and pressure.

[0057] In one embodiment, the temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet preset conditions, including:

[0058] The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the number of iteration steps reaches a preset value, and the solution result when the number of iteration steps reaches the preset value is used as the final value of the temperature and pressure.

[0059] In one application scenario, the interface diagram of solid thermal conductivity coupling calculation is as follows: Figure 2 As shown, the calculation parameters of the coupled iteration can be set, and the changes in the temperature and pressure of the internal flow network can be displayed in the form of charts.

[0060] As can be seen from the above, the embodiment of the present application provides a solid thermal conduction coupling calculation method, which can be applied to the calculation of the cold air outlet temperature of the internal flow network in the turbine blade. The internal flow network temperature and pressure are coupled and iteratively solved by heat flow, which can take into account various actual conditions in the pipeline network, more realistically reflect the temperature distribution of the cold air in the pipeline network, provide more accurate and realistic temperature calculation results, and help optimize the pipeline network design and improve the efficiency of heat transfer scheme design.

[0061] Embodiment 2

[0062] The present application embodiment provides a solid thermal conductivity coupling calculation system, including:

[0063] An initial value calculation module is used to calculate the initial values ​​of the temperature and pressure of the internal flow pipe network in the turbine blade;

[0064] Temperature calculation module, used to calculate the temperature and heat transfer coefficient of the internal coupling unit surface according to the initial values ​​of temperature and pressure;

[0065] Solid thermal conductivity calculation module, used to calculate the heat flow of the internal coupling unit surface based on temperature and heat transfer coefficient;

[0066] The coupled iterative module is used to perform coupled iterative solutions to the temperature and pressure of the internal flow network according to the heat flow, until the temperature and pressure obtained by the solution meet preset conditions, thereby obtaining the final values ​​of the temperature and pressure of the internal flow network.

[0067] As can be seen from the above, the embodiment of the present application provides a solid thermal conductivity coupling calculation system, which can be applied to the calculation of the cold air outlet temperature of the internal flow network in the turbine blade. Based on the coupling iteration module, the temperature and pressure of the internal flow network are coupled and iteratively solved through the heat flow. Various actual conditions in the pipeline network can be considered, and the temperature distribution of the cold air in the pipeline network can be more realistically reflected. More accurate and realistic temperature calculation results are provided, which helps to optimize the pipeline network design and improve the efficiency of the heat transfer scheme design.

[0068] Embodiment 3

[0069] An embodiment of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the memory is used to store software programs and modules, and the processor executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory and the processor are connected via a bus. Specifically, the processor implements any step in the first embodiment above by running the computer program stored in the memory.

[0070] It should be understood that in the embodiments of the present application, the processor referred to may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0071] The memory may include a read-only memory, a flash memory, and a random access memory, and provides instructions and data to the processor. A part or all of the memory may also include a nonvolatile random access memory.

[0072] It should be understood that if the above-mentioned integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The above-mentioned computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the above-mentioned computer program includes computer program code, and the above-mentioned computer program code can be in source code form, object code form, executable file or some intermediate form. The above-mentioned computer-readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the above-mentioned computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction.

[0073] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0074] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the above-mentioned device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0075] It should be noted that the methods and detailed examples provided in the above embodiments can be combined with the devices and equipment provided in the embodiments, and references can be made to each other, and no further details will be given.

[0076] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0077] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / terminal equipment and method can be implemented in other ways. For example, the apparatus / equipment embodiments described above are only schematic, for example, the division of the above modules or units is only a logical function division, and in actual implementation, other division methods can be used, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0078] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A solid thermal conductivity coupling calculation method, characterized in that: include: Calculate the initial values ​​of temperature and pressure of the internal flow network in the turbine blades; Calculate the temperature and heat transfer coefficient of the internal coupling unit surface based on the initial values ​​of temperature and pressure; Calculate the heat flux on the internal coupling unit surface based on the temperature and heat transfer coefficient; The temperature and pressure of the internal flow pipe network are coupled and iteratively solved according to the heat flow until the temperature and pressure obtained by the solution meet the preset conditions, thereby obtaining the final values ​​of the temperature and pressure of the internal flow pipe network; The initial values ​​of the temperature and pressure of the internal flow pipe network in the turbine blade are calculated as follows: Calculate the initial values ​​of the temperature and pressure of the internal flow network according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry; The initial values ​​of the temperature and pressure of the internal flow network are calculated according to the boundary conditions of the turbine blades and the grid information of the geometric shape of the turbine blades, including: Parametric modeling of turbine blades is performed according to design parameters to obtain a calculation model; Obtain the boundary conditions of the turbine blades, divide the grid according to the calculation model, and obtain the grid information of the turbine blade geometry; Iteratively calculate the temperature and pressure of the internal flow network according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry, and use the converged calculation results as the initial values ​​of the temperature and pressure; The boundary conditions for obtaining turbine blades include: Numerically calculating the fluid domain in the turbine blade to obtain heat flux density and near-wall temperature, and transferring the heat flux density and near-wall temperature obtained by numerically calculating the fluid domain in the turbine blade to the solid domain as boundary conditions of the solid domain in the turbine blade; The heat flux density and near-wall temperature flow obtained by numerically calculating the fluid domain in the turbine blade are transferred to the solid domain including: The heat flux density and near-wall temperature flow are transferred to the solid domain through an interpolation method at the fluid-solid interface between the fluid domain and the solid domain.

2. The solid thermal conductivity coupling calculation method according to claim 1, characterized in that: The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet the preset conditions, including: The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure converge, and the converged solution results are used as the final values ​​of the temperature and pressure.

3. The solid thermal conductivity coupling calculation method according to claim 1, characterized in that: The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the solved temperature and pressure meet the preset conditions, including: The temperature and pressure of the internal flow network are coupled and iteratively solved according to the heat flow until the number of iteration steps reaches a preset value, and the solution result when the number of iteration steps reaches the preset value is used as the final value of the temperature and pressure.

4. A solid thermal conductivity coupling calculation system, characterized in that: include: An initial value calculation module is used to calculate the initial values ​​of the temperature and pressure of the internal flow pipe network in the turbine blade; Temperature calculation module, used to calculate the temperature and heat transfer coefficient of the internal coupling unit surface according to the initial values ​​of temperature and pressure; Solid thermal conductivity calculation module, used to calculate the heat flow of the internal coupling unit surface based on temperature and heat transfer coefficient; A coupling iteration module is used to perform coupled iterative solution on the temperature and pressure of the internal flow network according to the heat flow, until the temperature and pressure obtained by the solution meet the preset conditions, thereby obtaining the final values ​​of the temperature and pressure of the internal flow network; The initial values ​​for calculating the temperature and pressure of the internal flow network in the turbine blade include: Calculate the initial values ​​of the temperature and pressure of the internal flow network according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry; The initial values ​​of the temperature and pressure of the internal flow network are calculated according to the boundary conditions of the turbine blades and the grid information of the geometric shape of the turbine blades, including: Parametric modeling of turbine blades is performed according to design parameters to obtain a calculation model; Obtain the boundary conditions of the turbine blades, divide the grid according to the calculation model, and obtain the grid information of the turbine blade geometry; Iteratively calculate the temperature and pressure of the internal flow network according to the boundary conditions of the turbine blades and the grid information of the turbine blade geometry, and use the converged calculation results as the initial values ​​of the temperature and pressure; The boundary conditions for obtaining turbine blades include: Numerically calculating the fluid domain in the turbine blade to obtain heat flux density and near-wall temperature, and transferring the heat flux density and near-wall temperature obtained by numerically calculating the fluid domain in the turbine blade to the solid domain as boundary conditions of the solid domain in the turbine blade; The heat flux density and near-wall temperature flow obtained by numerically calculating the fluid domain in the turbine blade are transferred to the solid domain including: The heat flux density and near-wall temperature flow are transferred to the solid domain through an interpolation method at the fluid-solid interface between the fluid domain and the solid domain.

5. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 3 when executing the computer program.

6. A computer-readable storage medium storing a computer program, 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 3 are implemented.

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