A method, system, device, and medium for predicting the cooling efficiency of a cooling film orifice.

Abstract

This invention provides a method, system, device, and medium for predicting the cooling efficiency of a film cooling hole. Based on the actual morphology of the film cooling hole produced by laser processing, a three-dimensional model of the flat-plate film cooling hole with a real morphology corresponding to the laser parameters is established. Based on the three-dimensional model, an adiabatic model of the flat-plate film cooling hole is established and finite element simulation is performed to obtain the finite element simulation results. Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the film cooling hole is obtained, and the cooling efficiency of the film cooling hole is predicted. This invention combines a three-dimensional model with a real morphology corresponding to the laser parameters and an adiabatic model of the flat-plate film cooling hole to realize the connection between laser parameters and the cooling efficiency of the film cooling hole. It solves the shortcomings of using an empirical trial-and-error approach to adjust laser parameters, saving significant economic and time costs.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and specifically to a method, system, device, and medium for predicting the cooling efficiency of cooling film holes. Background Technology

[0002] The manufacturing level of aircraft engines represents the technological level of high-end manufacturing, and the manufacturing level of aero engines has a significant impact on the power, lifespan, and reliability of aircraft. Research shows that the high-temperature resistance of engine blades directly affects the engine's thrust, and machining film cooling holes on the blades has proven to be the most effective technical means to date for increasing the temperature resistance of engine blades.

[0003] However, during the laser processing of cooling film holes, different ratios of laser parameters will cause the quality of the actual processed film holes to fail to meet the design requirements, resulting in a significant reduction in the cooling efficiency of the actual processed film holes. In the face of this problem, in current engineering practice, in order to meet the cooling efficiency requirements, existing technologies and actual production processes still use an experience-based trial-and-error approach to adjust laser parameters, which results in a large waste of manpower and resources, and its efficiency is extremely low and its accuracy is poor. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a method, system, equipment, and medium for predicting the cooling efficiency of a film cooling hole, overcoming the shortcomings of using an empirical trial-and-error approach to adjust laser parameters, providing a reference for laser debugging of film cooling holes in actual production, and saving significant economic and time costs.

[0005] This invention is achieved through the following technical solution:

[0006] A method for predicting the cooling efficiency of a cooling film orifice, characterized by comprising the following steps:

[0007] S1: Based on the actual cooling film hole morphology processed by laser, establish a three-dimensional model of the flat cooling film hole with the real cooling film hole morphology corresponding to the laser parameters.

[0008] S2: Based on the three-dimensional model of the flat plate cooling film hole, the adiabatic model of the flat plate cooling film hole is established and the finite element simulation calculation is performed to obtain the finite element simulation calculation results;

[0009] S3: Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the cooling film orifice is obtained, and the cooling efficiency of the film orifice is predicted.

[0010] Furthermore, after using laser processing to cool the air film cooling hole, a high-resolution optical microscope is needed to characterize and measure the inlet and outlet morphology of the air film cooling hole; the laser parameters of the air film cooling hole include laser power, defocusing amount and feed rate.

[0011] Furthermore, the true cooling film pore morphology is obtained by uniformly calibrating the microscope image using image measurement software to obtain the true size of the image.

[0012] Furthermore, the three-dimensional model of the flat plate cooling film vent is loaded using three-dimensional modeling software. The shape contour of the cooling film vent is drawn using spline curve commands. The drawn contour includes the inlet and outlet of the film cooling vent. The two contours are then connected using cut commands to complete the modeling of the three-dimensional model of the flat plate cooling film vent.

[0013] Furthermore, if the change in the inclination angle of the cooling film holes in the three-dimensional model of the flat plate cooling film holes causes a change in the hole shape and contour, a new reference plane is established, and the sketch plane direction of the inlet and outlet contours of the cooling film holes is changed. The adiabatic model of the flat plate cooling film holes is established based on the three-dimensional model of the flat plate cooling film holes, including the mainstream cavity and the cold flow cavity. The mainstream cavity and the cold flow cavity are fluid domains that describe the aerodynamic characteristics of the mainstream and the cold flow.

[0014] Furthermore, during finite element simulation, the adiabatic model of the flat plate cooling film perforation needs to be meshed using a hexahedral structured mesh. During the hexahedral structured mesh generation, the near-wall surfaces must satisfy y... + ≤1;

[0015] Among them, y + It is a dimensionless quantity representing the normal distance to a wall.

[0016] Based on the comparison of wind tunnel experiments and finite element simulation results of flat plate cooling film vents, a turbulence model was selected;

[0017] The calculation turbulence model used was the SST turbulence model based on kW plus the Gamma-Theta transition model. The boundary conditions of the main stream and jet were set according to the actual working conditions of the blades. The blowing ratio of the working condition was calculated by changing the inlet and outlet pressures of the cold flow.

[0018] Furthermore, the formula for the air film cooling efficiency in step S3 is:

[0019]

[0020] Where φ is the cooling efficiency, T h As the mainstream temperature, T t T represents the temperature of the plate. c This refers to the temperature of the cold flow.

[0021] A system for predicting the cooling efficiency of a cooling film orifice based on laser parameters, comprising:

[0022] The data acquisition and modeling module is used to establish a three-dimensional model of the cooling film hole on a flat plate with the actual cooling film hole morphology corresponding to the laser parameters, based on the actual cooling film hole morphology processed by the laser.

[0023] The finite element calculation module is used to establish a finite element simulation calculation of the adiabatic model of the flat plate cooling film hole based on the three-dimensional model of the flat plate cooling film hole, and to obtain the finite element simulation calculation results.

[0024] The output module is used to obtain the relationship between laser parameters and cooling efficiency of the cooling film orifice based on the finite element simulation results, and to predict the cooling efficiency of the cooling film orifice.

[0025] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of a method for predicting the cooling efficiency of a cooling film orifice.

[0026] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of a method for predicting the cooling efficiency of a cooling film orifice.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] This invention provides a method, system, equipment, and medium for predicting the cooling efficiency of a film cooling hole. Based on the actual morphology of the film cooling hole produced by laser processing, a three-dimensional model of the flat-plate film cooling hole with a real morphology corresponding to the laser parameters is established. Based on the three-dimensional model, an adiabatic model of the flat-plate film cooling hole is established and finite element simulation is performed to obtain the finite element simulation results. Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the film cooling hole is obtained, and the cooling efficiency of the film cooling hole is predicted. This invention combines a three-dimensional model with a real morphology corresponding to the laser parameters and an adiabatic model of the flat-plate film cooling hole to realize the connection between laser parameters and the cooling efficiency of the film cooling hole. It solves the problem of using an empirical trial-and-error approach to adjust laser parameters, providing a reference for laser debugging of film cooling holes in actual production, and saving significant economic and time costs. Attached Figure Description

[0029] Figure 1 This is a flowchart of a method for predicting the cooling efficiency of a cooling film orifice according to the present invention;

[0030] Figure 2The images show the morphology of the cooling film pores under a high-resolution optical microscope in a specific embodiment of the present invention, specifically the inlet (left) and outlet (right).

[0031] Figure 3 This is a schematic diagram of a three-dimensional model of a flat cooling film hole with real cooling film hole morphology corresponding to laser parameters in a specific embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the adiabatic model of the flat plate cooling film pores established based on the three-dimensional model of the flat plate cooling film pores in a specific embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the flat plate cooling film perforation adiabatic model after meshing in a specific embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of contour lines after processing the cooling efficiency calculation in a specific embodiment of the present invention. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] A method for predicting the cooling efficiency of a cooling film orifice, such as Figure 1 As shown, it includes the following steps:

[0039] S1: Based on the actual cooling film hole morphology processed by laser, establish a three-dimensional model of the flat cooling film hole with the real cooling film hole morphology corresponding to the laser parameters.

[0040] S2: Based on the three-dimensional model of the flat plate cooling film hole, the adiabatic model of the flat plate cooling film hole is established and the finite element simulation calculation is performed to obtain the finite element simulation calculation results;

[0041] S3: Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the cooling film orifice is obtained, and the cooling efficiency of the film orifice is predicted.

[0042] Preferably, after processing the cooling film cooling holes with a laser, a high-resolution optical microscope is required to characterize and measure the inlet and outlet morphology of the film cooling holes; the laser parameters of the film cooling holes include laser power, defocusing amount and feed rate.

[0043] Preferably, the true cooling film pore morphology is obtained by uniformly scaling the microscope image using image measurement software to obtain the true size of the image.

[0044] Preferably, the three-dimensional model of the flat plate cooling film vent is loaded using three-dimensional modeling software. The shape contour of the cooling film vent is drawn using spline curve commands, wherein the drawn contour includes the inlet and outlet of the film cooling vent, and the two contours are connected by cutting commands to complete the modeling of the three-dimensional model of the flat plate cooling film vent.

[0045] Preferably, if the change in the inclination angle of the cooling film holes in the three-dimensional model of the flat plate cooling film holes causes a change in the hole shape and contour, a new reference plane is established, and the sketch plane orientation of the inlet and outlet contours of the cooling film holes is changed for drawing.

[0046] Preferably, the flat plate cooling film pore adiabatic model is established based on the flat plate cooling film pore three-dimensional model, including the main flow cavity and the cold flow cavity.

[0047] Among them, the mainstream cavity and the cold flow cavity are fluid domains, which describe the aerodynamic characteristics of the mainstream and the cold flow.

[0048] Preferably, when performing finite element simulation calculations, it is necessary to perform hexahedral structured mesh generation on the flat plate cooling film hole model. The hexahedral structured mesh generation requires that the near-wall surface satisfy y... + ≤1;

[0049] Among them, y + It is a dimensionless quantity representing the normal distance to a wall.

[0050] Based on the comparison of wind tunnel experiments and finite element simulation results of flat plate cooling film vents, a turbulence model was selected;

[0051] The calculation turbulence model used was the SST turbulence model based on kW plus the Gamma-Theta transition model. The boundary conditions of the main stream and jet were set according to the actual working conditions of the blades. The blowing ratio of the working condition was calculated by changing the inlet and outlet pressures of the cold flow.

[0052] Preferably, the air film cooling efficiency in step S3 is:

[0053]

[0054] Where φ is the cooling efficiency, T h As the mainstream temperature, T t T represents the temperature of the plate. c This refers to the temperature of the cold flow.

[0055] This invention provides a system for predicting the cooling efficiency of a cooling film orifice based on laser parameters, comprising:

[0056] The data acquisition and modeling module is used to establish a three-dimensional model of the cooling film hole on a flat plate with the actual cooling film hole morphology corresponding to the laser parameters, based on the actual cooling film hole morphology processed by the laser.

[0057] The finite element calculation module is used to establish a cooling film hole adiabatic model based on a three-dimensional model of a flat plate cooling film hole and to perform finite element simulation calculations to obtain finite element simulation results.

[0058] The output module is used to obtain the relationship between laser parameters and cooling efficiency of the cooling film orifice based on the finite element simulation results, and to predict the cooling efficiency of the cooling film orifice.

[0059] Example 1:

[0060] S1: Based on the actual cooling film hole morphology processed by laser, establish a three-dimensional model of the flat cooling film hole with the real cooling film hole morphology corresponding to the laser parameters.

[0061] S2: Based on the three-dimensional model of the cooling film pores of the flat plate, the adiabatic model of the cooling film pores is established and the finite element simulation calculation is performed to obtain the finite element simulation calculation results;

[0062] S3: Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the cooling film orifice is obtained, and the cooling efficiency of the film orifice is predicted.

[0063] Before step S1, the pore morphology of the flat-plate cooling film pore sample needs to be measured and characterized. A high-resolution optical microscope can be used to characterize the inlet and outlet morphology of the film cooling pores, such as... Figure 2As shown. It should be noted that the laser parameters for this film cooling hole are: laser power 0.8W, defocusing amount 0mm, and feed rate 0.01mm / r. Characterizing the film cooling hole with a high-resolution optical microscope can clearly show the influence of different laser parameters on the morphology of the cooling film cooling hole during the processing, thereby reducing modeling errors and improving the accuracy of prediction.

[0064] In step S1, image measurement software (such as ImageJ) is used to standardize the scale of the microscope image of the above-mentioned film cooling hole morphology to obtain the true size of the image. This is convenient for importing the image into 3D drawing software and standardizing the true size of the image. It should be noted that the size of the image obtained by high-resolution optical microscope is not the true size of the film cooling hole morphology. The image needs to be standardized to obtain the true size of the image.

[0065] In step S1, the film cooling holes are modeled using 3D modeling software (such as SolidWorks). Microscopic images of the film cooling hole morphology are loaded into SolidWorks using a sketch method. The outline of the cooling film cooling hole morphology is drawn using spline curve commands, including the inlet and outlet of the cooling film cooling hole. Then, the two outlines are connected using the cut command to complete the establishment of a 3D model of the flat plate cooling film cooling hole with a realistic cooling film cooling hole morphology corresponding to the laser parameters. Figure 3 As shown (90-degree tilt angle film cooling hole). It should be noted that by simultaneously drawing the inlet and outlet contours of the film cooling hole, not only is the actual shape and contour of the film cooling hole restored, but the taper variation of the film cooling hole caused by different laser parameters is also reflected, thereby reducing modeling errors and improving the accuracy of prediction.

[0066] It should be noted that the 3D model of the flat plate cooling film vent is a simplified model of the blade, that is, a 3D model of a flat plate with cooling film vents. Furthermore, the changes in the vent shape caused by variations in the vent angle can be addressed by establishing a new reference plane and changing the sketch plane orientation of the vent inlet and outlet contours. It should be noted that drawing a 3D model of a cooling film vent with an angle by changing the reference plane has a certain predictive error; however, this method can further save on economic and time costs.

[0067] In step S2, a cooling film pore adiabatic model is established based on the three-dimensional model of the flat cooling film pores created in step S1, including the main flow cavity and the cold flow cavity, such as... Figure 4As shown. The cooling film adiabatic model is imported into finite element analysis software (such as CFX) for finite element simulation. It should be noted that before performing the finite element simulation, the model needs to be meshed. A hexahedral structured mesh is created using meshing software (such as ICEM), requiring the near-wall surfaces to satisfy y... + ≤1, such as Figure 5 As shown. Where y + It is a dimensionless quantity representing the normal distance to a wall.

[0068] Based on a comparison of wind tunnel experiments and finite element simulations using a flat-plate cooled film cooling system, a turbulence model was selected. The calculation turbulence model employed a combination of the SST turbulence model and the Gamma-Theta transition model, based on kW. Boundary conditions for the main flow and jet were set according to the actual operating conditions of the blades. The blowing ratio of the cold flow inlet and outlet pressures was varied to calculate the operating conditions. Table 1 shows the boundary conditions of the finite element adiabatic model. It should be noted that the SST turbulence model combined with the Gamma-Theta transition model has certain advantages in predicting separation and heat transfer, enhancing the accuracy of the predictions.

[0069] Table 1

[0070]

[0071] In step S3, based on the finite element simulation results of the aforementioned adiabatic model, a correspondence is established between the laser parameters and the cooling efficiency of the cooling film vents, such as... Figure 6 As shown. The cooling efficiency of the cooling film holes processed under these laser parameters is then predicted. It should be noted that the formula for calculating the cooling efficiency is:

[0072]

[0073] Where φ is the cooling efficiency, T h As the mainstream temperature, T t T represents the temperature of the plate. c To determine the cold flow temperature, the cooling efficiency calculation formula was developed using the post-processing software Tecplot, and a contour plot of the cooling efficiency at the cooling film vents was obtained, as shown below. Figure 6 As shown.

[0074] In another embodiment of the present invention, a computer device is provided, comprising a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to achieve a corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used in the operation of a method for predicting the cooling efficiency of a cooling film orifice.

[0075] In another embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the operating system of the terminal. Furthermore, the storage space also stores one or more instructions suitable for loading and execution by a processor, which can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for predicting the cooling efficiency of a cooling film orifice in the above embodiments.

[0076] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0077] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for predicting the cooling efficiency of a cooling film orifice, characterized in that, Includes the following steps: S1: Based on the actual cooling film hole morphology processed by laser, establish a three-dimensional model of the flat cooling film hole with the real cooling film hole morphology corresponding to the laser parameters. After processing the cooling film holes with a laser, the morphology of the cooling film holes at the inlet and outlet is characterized and measured using a high-resolution optical microscope; the laser parameters of the cooling film holes include laser power, defocusing amount, and feed rate; S2: Based on the three-dimensional model of the flat plate cooling film hole, an adiabatic model of the flat plate cooling film hole is established and finite element simulation is performed to obtain the finite element simulation results. If the change in the inclination angle of the cooling film hole in the three-dimensional model of the flat plate cooling film hole causes a change in the hole shape and contour, a new reference plane is established, and the sketch plane direction of the inlet and outlet contours of the cooling film hole is changed. The adiabatic model of the flat plate cooling film hole is established based on the three-dimensional model of the flat plate cooling film hole, including the main flow cavity and the cold flow cavity. The main flow cavity and the cold flow cavity are fluid domains, describing the aerodynamic characteristics of the main flow and the cold flow. When performing finite element simulation calculations, the adiabatic model of the flat plate cooling film perforation is meshed with a hexahedral structure. During the hexahedral structured mesh generation, the near-wall surfaces are required to satisfy y... ＋ ≤1; Among them, y ＋ It is a dimensionless quantity representing the normal distance to a wall. The calculation turbulence model uses the SST turbulence model based on kW plus the Gamma-Theta transition model. The boundary conditions of the main stream and jet are set according to the actual working conditions of the blades. The blowing ratio of the calculation condition is calculated by changing the inlet and outlet pressures of the cold flow. S3: Based on the finite element simulation results, the relationship between laser parameters and the cooling efficiency of the cooling film orifice is obtained, and the cooling efficiency of the film orifice is predicted.

2. The method for predicting the cooling efficiency of a cooling film orifice according to claim 1, characterized in that, The true size of the cooling film pores was obtained by uniformly calibrating the microscope image using image measurement software.

3. The method for predicting the cooling efficiency of a cooling film orifice according to claim 1, characterized in that, The three-dimensional model of the flat plate cooling film hole is loaded using three-dimensional modeling software. The shape contour of the cooling film hole is drawn using spline curve commands. The drawn contour includes the inlet and outlet of the cooling film hole. The two contours are connected by cutting commands to complete the modeling of the three-dimensional model of the flat plate cooling film hole.

4. The method for predicting the cooling efficiency of a cooling film orifice according to claim 1, characterized in that, The formula for the cooling efficiency of the cooling film pores in step S3 is: ; in, For cooling efficiency, Mainstream temperature, For plate temperature, This refers to the temperature of the cold flow.

5. A system for predicting the cooling efficiency of a cooling film orifice based on laser parameters, characterized in that, A method for predicting the cooling efficiency of a cooling film orifice according to any one of claims 1-4 includes: The data acquisition and modeling module is used to establish a three-dimensional model of the cooling film hole on a flat plate with the actual cooling film hole morphology corresponding to the laser parameters, based on the actual cooling film hole morphology processed by the laser. After processing the cooling film holes with a laser, the morphology of the cooling film holes at the inlet and outlet is characterized and measured using a high-resolution optical microscope; the laser parameters of the cooling film holes include laser power, defocusing amount, and feed rate; The finite element calculation module is used to establish an adiabatic model of a flat plate cooling film hole based on a three-dimensional model of the flat plate cooling film hole and to perform finite element simulation calculations to obtain finite element simulation results. If the change in the inclination angle of the cooling film hole in the three-dimensional model of the flat plate cooling film hole causes a change in the hole shape and contour, a new reference plane is established, and the sketch plane direction of the inlet and outlet contours of the cooling film hole is changed. The adiabatic model of the flat plate cooling film hole is established based on the three-dimensional model of the flat plate cooling film hole and includes a main flow cavity and a cold flow cavity. The main flow cavity and the cold flow cavity are fluid domains that describe the aerodynamic characteristics of the main flow and the cold flow. When performing finite element simulation calculations, the adiabatic model of the flat plate cooling film perforation is meshed with a hexahedral structure. During the hexahedral structured mesh generation, the near-wall surfaces are required to satisfy y... ＋ ≤1; Among them, y ＋ It is a dimensionless quantity representing the normal distance to a wall. The calculation turbulence model uses the SST turbulence model based on kW plus the Gamma-Theta transition model. The boundary conditions of the main stream and jet are set according to the actual working conditions of the blades. The blowing ratio of the calculation condition is calculated by changing the inlet and outlet pressures of the cold flow. The output module is used to obtain the relationship between laser parameters and cooling efficiency of the cooling film orifice based on the finite element simulation results, and to predict the cooling efficiency of the cooling film orifice.

6. 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 processor executes the computer program, it implements the steps of the method for predicting the cooling efficiency of a cooling film orifice as described in any one of claims 1-4.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of a method for predicting the cooling efficiency of a cooling film orifice as described in any one of claims 1-4.

Images