Method and system for rapidly evaluating exhaust capacity of exhaust section of gas compressor test bed

Abstract

The invention discloses a method and a system for quickly evaluating the exhaust capacity of an exhaust section of a gas compressor test bed, and the method can quickly evaluate the maximum exhaust flow of a vehicle bed exhaust system in the design stage of a gas compressor test piece only by performing CFD calculation of the gas compressor test piece and blockage point flow calculation of each characteristic cross section of the exhaust section. The flow required by the vehicle frame exhaust system for passing through the gas compressor test piece is determined, the problem that the performance curve of the gas compressor test piece cannot be completely recorded in the test process is avoided, it is ensured that the performance recording test of the gas compressor test piece can be smoothly carried out, and a grid model of the exhaust system does not need to be established in the whole process; and joint simulation of the exhaust system and the test piece does not need to be carried out, so that the time required by designers for evaluating the exhaust capacity of the vehicle platform exhaust system is greatly shortened, the research and development efficiency is improved, the test risk is reduced, the application range is wide, and the method can be suitable for all aero-engine compressor test pieces.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor testing, and in particular to a method and system for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench, electronic equipment, and a computer-readable storage medium. Background Art

[0002] At present, in the performance test of aircraft engine compressor test pieces, the rear end of the test piece is usually connected to a vehicle exhaust system, and the test piece outlet air is discharged to the outside through the vehicle exhaust system. Specifically, the aircraft engine compressor test bench usually includes an intake section, a compressor test piece, an exhaust section, an exhaust volute and an exhaust pipeline, such as Figure 1 As shown in the figure, air flows in from the air intake section, flows through the test piece, the exhaust section and the exhaust volute in sequence, and finally flows out from the exhaust pipe. The exhaust section, the exhaust volute and the exhaust pipe constitute the vehicle exhaust system. For a test vehicle with an exhaust function, the maximum exhaust flow rate of its exhaust system usually depends on the geometric size of the exhaust section, such as Figure 2 As shown, the exhaust section is usually composed of a hub, a casing and a support plate. One of the main performance parameters of the compressor test piece is the flow rate, that is, the mass of air flowing through it per second. If the flow rate of the test piece exceeds the maximum exhaust flow rate of the vehicle exhaust system, the vehicle exhaust system will not be able to discharge the air smoothly, resulting in the inability to fully record the flow-compression ratio curve and flow-efficiency curve of the compressor test piece during the test.

[0003] In the past, the problem of the exhaust system not being able to exhaust smoothly could not be discovered until the performance test of the compressor test piece was carried out, which seriously delayed the development progress of the compressor. However, with the development of three-dimensional numerical simulation (CFD) technology, designers modeled the test piece and the exhaust system and carried out joint simulation calculations. They can judge whether the exhaust system can exhaust smoothly according to the simulation calculation results during the design stage. The specific process is: 1) Use the meshing tool to divide the fluid domain mesh of the compressor test piece, exhaust section, exhaust volute and exhaust pipeline respectively; 2) The compressor test piece, exhaust section, exhaust volute and exhaust pipeline are meshed in the fluid domain. 1) Combine the mesh model of the compressor test piece and the exhaust system to form a joint calculation model of the compressor test piece and the exhaust system; 2) In the CFD pre-processing software, set the speed, boundary conditions and other necessary pre-processing settings for the calculation model; 3) Perform calculations in the CFD calculation software until the case converges; 4) Repeat steps 3) and 4), and continuously add the outlet flow boundary conditions and calculate until the case diverges; 5) In the CFD post-processing software, extract the CFD calculation results, obtain the maximum flow that the compressor and exhaust system can pass, and judge whether the exhaust system meets the exhaust requirements of the compressor test piece. However, the existing CFD simulation method requires the test piece and the exhaust system to be simulated and calculated jointly. Due to the large number of parts, large modeling workload, and large number of grids, the simulation calculation is time-consuming. At the same time, the joint simulation model is very complex and the calculation is not easy to converge. Moreover, if the exhaust system does not meet the exhaust requirements of the compressor test piece, the designer needs to redesign the exhaust system, re-divide the grid and conduct joint simulation calculation evaluation again, which is inefficient and there is a problem of repeated design of the exhaust system. Summary of the invention

[0004] The present invention provides a method and system for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, an electronic device, and a computer-readable storage medium. The method does not require the establishment of a grid model of the exhaust system, nor does it require the joint simulation of the exhaust system and the test piece. It can greatly reduce the time required for designers to evaluate the exhaust capacity of the vehicle bench exhaust system, improve research and development efficiency, reduce test risks, and has a wide range of applications.

[0005] According to one aspect of the present invention, a method for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench is provided, comprising the following contents: Determine the design status of the compressor test article; According to the design status of the compressor test piece, CFD calculation is carried out on the test piece to obtain the relevant parameters of the test piece outlet section, and the converted flow rate of the test piece outlet section is calculated; Obtaining geometric parameters of each characteristic cross section of the exhaust section, and calculating the area of ​​each characteristic cross section; The flow rate at the blocked point of each characteristic cross section is calculated based on the area of ​​each characteristic cross section; The flow rates at the blocked points of all characteristic sections are compared with the converted flow rates at the outlet section of the test piece, and the exhaust capacity of the exhaust section is evaluated based on the comparison results.

[0006] Furthermore, the converted flow rate of the test piece outlet section is calculated based on the following formula: in, represents the converted flow rate of the test piece outlet cross section, represents the physical flow rate at the outlet cross section of the test piece, represents the average total pressure at the outlet section of the test piece, Represents the average total temperature of the test piece outlet section.

[0007] Furthermore, the characteristic cross-section of the exhaust section includes the inlet cross-section, the cross-section with the maximum thickness of the support plate and the outlet cross-section. The area calculation formula of the inlet cross-section and the outlet cross-section is: , the area calculation formula of the maximum thickness section of the support plate is: ,in, represents the geometric area, Indicates the radius of the exhaust section casing, Indicates the radius of the exhaust section hub, t Indicates the maximum thickness of the support plate, N Indicates the number of support plates.

[0008] Furthermore, the characteristic cross section also includes a plurality of cross sections near the cross section with the maximum thickness of the support plate.

[0009] Furthermore, the flow rate at each characteristic cross section is calculated based on the following formula: in, Indicates the flow rate at the bottleneck point of the characteristic cross section, represents the total pressure recovery coefficient of the characteristic cross section, represents a constant determined by the physical properties of the gas, Represents the geometric area of ​​a characteristic cross section.

[0010] Furthermore, if the blockage flow rate of all characteristic sections is greater than the converted flow rate of the test piece outlet section, it is determined that the exhaust capacity of the exhaust section meets the requirements; if the blockage flow rate of at least one characteristic section is less than or equal to the converted flow rate of the test piece outlet section, it is determined that the exhaust capacity of the exhaust section does not meet the requirements.

[0011] Furthermore, the design state of the compressor test piece includes a design speed and a blockage state.

[0012] In addition, the present invention also provides a system for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, comprising: A design state determination module, used to determine the design state of the compressor test piece; The CFD calculation module is used to perform CFD calculation on the test piece according to the design state of the compressor test piece, obtain the relevant parameters of the test piece outlet section, and calculate the converted flow rate of the test piece outlet section; A cross-sectional area calculation module is used to obtain the geometric parameters of each characteristic cross section of the exhaust section and calculate the area of ​​each characteristic cross section; A blockage flow calculation module is used to calculate the blockage flow of each characteristic section according to the area of ​​each characteristic section; The exhaust capacity evaluation module is used to compare the blockage flow of all characteristic sections with the converted flow of the test piece outlet section, and evaluate the exhaust capacity of the exhaust section based on the comparison results.

[0013] In addition, the present invention also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the steps of the above method by calling the computer program stored in the memory.

[0014] In addition, the present invention also provides a computer-readable storage medium for storing a computer program for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, wherein the computer program executes the steps of the method described above when running on a computer.

[0015] The present invention has the following beneficial effects: The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench of the present invention only needs to perform CFD calculations on the compressor test piece and calculations on the flow at the blocked points of each characteristic section of the exhaust section, so as to quickly evaluate the maximum exhaust flow of the bench exhaust system during the design stage of the compressor test piece, and determine the flow required by the compressor test piece that the bench exhaust system can pass, thereby avoiding the problem of being unable to fully record the performance curve of the compressor test piece during the test, and ensuring that the performance recording test of the compressor test piece can be carried out smoothly. The entire process does not require the establishment of a grid model of the exhaust system, nor does it require the joint simulation of the exhaust system and the test piece. Therefore, the time required for designers to evaluate the exhaust capacity of the bench exhaust system is greatly reduced, the research and development efficiency is improved, the test risk is reduced, and the application range is wide, and it can be applied to all aircraft engine compressor test pieces.

[0016] In addition, the exhaust capacity rapid evaluation system of the exhaust section of the compressor test bench of the present invention also has the above advantages.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. 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: Figure 1 It is a schematic diagram of the air flow path of the compressor test bench; Figure 2 It is a schematic diagram of the structure of the exhaust section of the test bench; Figure 3 It is a flow chart of a method for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench according to a preferred embodiment of the present application; Figure 4 It is a schematic diagram of the position of the exhaust section inlet cross section of the preferred embodiment of the present application; Figure 5 It is a schematic diagram of the position of the maximum thickness cross section of the exhaust section support plate of the preferred embodiment of the present application; Figure 6 It is a schematic diagram of the position of the exhaust section outlet cross section of the preferred embodiment of the present application; Figure 7 is a schematic structural diagram of a fan test piece in a preferred embodiment of the present application; Figure 8 It is a schematic diagram comparing the fan component test results, the fan test piece CFD calculation results and the calculation results of the present invention in the preferred embodiment of the present application; Fig. 9 It is a schematic diagram of the module structure of a system for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench according to another embodiment of the present application. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Reference Figure 3 The preferred embodiment of the present application provides a method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, comprising the following contents: Step S1: Determine the design state of the compressor test piece; Step S2: performing CFD calculation on the compressor test piece according to the design state of the test piece, obtaining relevant parameters of the outlet section of the test piece, and calculating the converted flow rate of the outlet section of the test piece; Step S3: obtaining geometric parameters of each characteristic cross section of the exhaust section, and calculating the area of ​​each characteristic cross section; Step S4: Calculate the flow rate of the blocked point of each characteristic cross section according to the area of ​​each characteristic cross section; Step S5: Compare the blockage flow rates of all characteristic sections with the converted flow rates of the test piece outlet section, and evaluate the exhaust capacity of the exhaust section based on the comparison results.

[0021] It can be understood that the method for quickly evaluating the exhaust capacity of the exhaust section of the compressor test bench of the present embodiment only needs to perform CFD calculations of the compressor test piece and calculations of the flow at the blocked points of each characteristic section of the exhaust section, so as to quickly evaluate the maximum exhaust flow of the bench exhaust system during the design stage of the compressor test piece, and determine that the bench exhaust system can pass the flow required by the compressor test piece, thereby avoiding the problem of being unable to fully record the performance curve of the compressor test piece during the test, and ensuring that the performance recording test of the compressor test piece can be carried out smoothly. The entire process does not require the establishment of a grid model of the exhaust system, nor does it require the joint simulation of the exhaust system and the test piece. Therefore, the time required for designers to evaluate the exhaust capacity of the bench exhaust system is greatly reduced, the R&D efficiency is improved, the test risk is reduced, and the application range is wide, and it can be applied to all aircraft engine compressor test pieces, such as fans, axial flow compressors, centrifugal compressors, etc.

[0022] It can be understood that in step S1, the design state of the compressor test piece to be evaluated is first determined. The design state refers to the physical speed and physical flow rate of the compressor test piece. Usually, the design speed and blockage state (i.e., maximum flow state) of the compressor test piece are selected.

[0023] It can be understood that in step S2, CFD calculation is carried out according to the design state of the compressor test piece determined in step S1, and relevant parameters such as the physical flow rate, average total temperature, and average total pressure of the outlet section of the compressor test piece are extracted from the CFD calculation results, and then the converted flow rate of the outlet section of the test piece is calculated. The converted flow rate of the outlet section of the test piece is calculated based on the following formula: in, represents the converted flow rate of the test piece outlet cross section, represents the physical flow rate at the outlet cross section of the test piece, represents the average total pressure at the outlet section of the test piece, Represents the average total temperature of the test piece outlet section.

[0024] It can be understood that in step S3, a plurality of characteristic cross sections are first selected on the exhaust section, and the geometric parameters of each characteristic cross section are obtained, and then the geometric area of ​​each characteristic cross section is calculated according to the geometric parameters of each characteristic cross section. The selected characteristic cross sections include the inlet cross section, the cross section with the maximum thickness of the support plate (i.e., the cross section corresponding to the position of the maximum thickness of the support plate), and the outlet cross section. The inlet cross section is as follows: Figure 4 As shown, the maximum thickness section of the support plate is Figure 5As shown, the outlet cross section is Figure 6 As shown. Of course, in other embodiments of the present invention, the selected characteristic cross section may also include multiple cross sections near the cross section with the maximum thickness of the support plate, so as to accurately find the cross section with the smallest flow area of ​​the exhaust section. After determining the characteristic cross section, the geometric parameters to be obtained include: the inner diameter and outer diameter of the characteristic cross section, the thickness of the support plate at the characteristic cross section, the number of support plates, etc. For the characteristic cross section (i.e., the inlet cross section and the outlet cross section) that does not include the support plate, the area calculation formula is: , and for the characteristic section containing the support plate (such as the section with the maximum thickness of the support plate), the area calculation formula is: ,in, represents the geometric area, Indicates the radius of the exhaust section casing, Indicates the radius of the exhaust section hub, t represents the thickness of the support plate at the characteristic section, N Indicates the number of support plates.

[0025] It can be understood that in step S4, the flow rate passing through the characteristic cross section can be calculated based on the following formula: ,in, Represents the physical flow rate of the characteristic cross section of the exhaust section, represents a constant determined by the physical properties of the gas (for air, The value is 0.0404). represents the average total pressure of the characteristic cross section, represents the average total temperature of the characteristic cross section, represents the geometric area of ​​the characteristic cross section, represents the average Mach number of the characteristic cross section, represents the flow function. When the average Mach number of the characteristic cross section When the flow function , which means that the characteristic section enters the blocking state. The physical flow calculated at this time is the blocking flow (i.e., the maximum physical flow). Assuming that the exhaust process is an adiabatic process, the total temperature at the exhaust section inlet is 288.15K, the total inlet pressure is 101325Pa, and the air intake direction is axial. Considering that the air will generate flow losses when flowing through the exhaust section, the blocking flow of the characteristic section can be calculated based on the following formula: in, Indicates the flow rate at the bottleneck point of the characteristic cross section, It represents the total pressure recovery coefficient of the characteristic section (i.e. the ratio of the total pressure of the characteristic section to the total pressure at the exhaust section inlet). represents a constant determined by the physical properties of the gas, Represents the geometric area of ​​a characteristic cross section. The value of is related to the position of the characteristic section. When the characteristic section is the exhaust section inlet section, ; When the characteristic section is the exhaust section outlet section, ; The total pressure recovery coefficient of the characteristic cross section at other positions can be linearly interpolated according to the total pressure recovery coefficient of the exhaust section inlet and outlet cross sections. When the exhaust section inlet total temperature is 288.15K and the inlet total pressure is 101325Pa, the converted flow rate of the exhaust section inlet cross section is exactly equal to the physical flow rate of the exhaust section inlet cross section. Combined with the law of conservation of flow, the converted flow rate of the exhaust section inlet cross section is equal to the physical flow rate on any characteristic cross section of the exhaust section.

[0026] It can be understood that in step S5, the flow rates at the blocked points of all characteristic sections are compared with the converted flow rates at the outlet section of the test piece, and the exhaust capacity of the exhaust section is evaluated based on the comparison result. >Converted flow rate of compressor test piece outlet section , it indicates that the characteristic cross section can pass the required flow rate of the compressor test piece. On the contrary, if ≤ , it indicates that the characteristic section cannot pass the flow required by the compressor test piece. Therefore, if the flow rate at the blocking point of all characteristic sections is greater than the converted flow rate of the test piece outlet section, it is determined that the exhaust capacity of the exhaust section meets the requirements, indicating that the exhaust system meets the test exhaust requirements and can be exhausted smoothly. If the flow rate at the blocking point of at least one characteristic section is less than or equal to the converted flow rate of the test piece outlet section, it is determined that the exhaust capacity of the exhaust section does not meet the requirements, indicating that the exhaust system does not meet the test exhaust requirements and cannot be exhausted smoothly. Designers need to optimize the geometric parameters of the characteristic sections that do not meet the exhaust requirements.

[0027] In addition, in order to verify the effectiveness and accuracy of the rapid assessment method of the present invention, the present application also conducted experimental verification. Figure 7 The fan test piece shown in the figure needs to record the performance of the inner and outer ducts of the fan test piece at multiple speeds according to the development requirements. Before the test, CFD simulation calculations were carried out on the compressor test piece, and the CFD results of the compressor test piece performance were obtained. The exhaust capacity of the fan outer duct exhaust system was evaluated using the method of the present invention. The results show that the maximum converted flow rate of the fan outer duct exhaust system is greater than the maximum converted flow rate of the outer duct calculated by CFD, indicating that the outer duct exhaust system meets the exhaust requirements of the fan outer duct. In addition, the method of the present invention has also been verified by fan component tests, wherein the fan component test results, the fan test piece CFD calculation results, and the calculation results of the exhaust system by the method of the present invention are compared, as shown in FIG. Figure 8As shown, the horizontal axis is the converted flow rate at the fan duct outlet, the vertical axis is the total pressure ratio of the fan duct, the black solid dots are the test results, the black hollow dots with smooth lines are the fan CFD simulation calculation results, and the red solid line is the maximum converted flow rate that can flow through the exhaust system calculated by the present invention. Figure 8 It can be seen that all the black hollow points fall on the left side of the red solid line, which means that the maximum converted flow rate calculated by the fan CFD is smaller than the maximum converted flow rate of the exhaust section, and the maximum flow rate of the fan culvert recorded in the experiment is basically consistent with the maximum flow rate of the fan culvert calculated by CFD. The performance curve recorded in the fan culvert experiment is relatively complete and can record the maximum flow point calculated by the culvert CFD, which is consistent with the evaluation result of the exhaust capacity of the culvert exhaust system of the present invention.

[0028] In addition, if Fig. 9 As shown, another embodiment of the present invention further provides a system for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench, preferably using the method for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench as described above, comprising: A design state determination module, used to determine the design state of the compressor test piece; The CFD calculation module is used to perform CFD calculation on the test piece according to the design state of the compressor test piece, obtain the relevant parameters of the test piece outlet section, and calculate the converted flow rate of the test piece outlet section; A cross-sectional area calculation module is used to obtain the geometric parameters of each characteristic cross section of the exhaust section and calculate the area of ​​each characteristic cross section; A blockage flow calculation module is used to calculate the blockage flow of each characteristic section according to the area of ​​each characteristic section; The exhaust capacity evaluation module is used to compare the blockage flow of all characteristic sections with the converted flow of the test piece outlet section, and evaluate the exhaust capacity of the exhaust section based on the comparison results.

[0029] It can be understood that the exhaust capacity rapid evaluation system of the exhaust section of the compressor test bench of the present embodiment only needs to perform CFD calculations of the compressor test piece and calculations of the blockage flow rate of each characteristic section of the exhaust section, so as to quickly evaluate the maximum exhaust flow rate of the vehicle bench exhaust system during the design stage of the compressor test piece, and determine that the vehicle bench exhaust system can pass the flow rate required by the compressor test piece, thereby avoiding the problem of being unable to fully record the performance curve of the compressor test piece during the test, and ensuring that the performance recording test of the compressor test piece can be carried out smoothly. The entire process does not require the establishment of a grid model of the exhaust system, nor does it require the joint simulation of the exhaust system and the test piece. Therefore, the time required for designers to evaluate the exhaust capacity of the vehicle bench exhaust system is greatly reduced, the R&D efficiency is improved, the test risk is reduced, and the application range is wide, and it can be applied to all aircraft engine compressor test pieces, such as fans, axial flow compressors, centrifugal compressors, etc.

[0030] In addition, another embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the steps of the above method by calling the computer program stored in the memory.

[0031] In addition, another embodiment of the present invention further provides a computer-readable storage medium for storing a computer program for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, wherein the computer program executes the steps of the method described above when running on a computer.

[0032] Common computer-readable storage media include: floppy disks, flexible disks, hard disks, magnetic tapes, any other magnetic media, CD-ROMs, any other optical media, punch cards, paper tapes, any other physical media with patterns of holes, random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), flash-erasable programmable read-only memory (FLASH-EPROM), any other memory chip or cartridge, or any other medium that can be read by a computer. Instructions can further be transmitted or received by a transmission medium. The term transmission medium may include any tangible or intangible medium that can be used to store, encode or carry instructions for execution by a machine, and includes digital or analog communication signals or intangible media that facilitate communication of the above instructions. Transmission media include coaxial cables, copper wire, and optical fiber, including the wires of a bus used to transmit a computer data signal.

[0033] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present application may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0034] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0035] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0036] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0037] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0039] 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 quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, characterized in that: Includes the following: Determine the design status of the compressor test article; According to the design status of the compressor test piece, CFD calculation is carried out on the test piece to obtain the relevant parameters of the test piece outlet section, and the converted flow rate of the test piece outlet section is calculated; Obtaining geometric parameters of each characteristic cross section of the exhaust section, and calculating the area of ​​each characteristic cross section; The flow rate at the blocked point of each characteristic cross section is calculated based on the area of ​​each characteristic cross section; The blockage flow rates of all characteristic sections are compared with the converted flow rates of the test piece outlet section, and the exhaust capacity of the exhaust section is evaluated based on the comparison results.

2. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 1, characterized in that: The converted flow rate of the test piece outlet section is calculated based on the following formula: in, represents the converted flow rate of the test piece outlet cross section, represents the physical flow rate at the outlet cross section of the test piece, represents the average total pressure at the outlet section of the test piece, Represents the average total temperature of the test piece outlet section.

3. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 1, characterized in that: The characteristic cross-sections of the exhaust section include the inlet cross-section, the maximum thickness cross-section of the support plate, and the outlet cross-section. The area calculation formulas for the inlet cross-section and the outlet cross-section are: , the area calculation formula of the maximum thickness section of the support plate is: ,in, represents the geometric area, Indicates the radius of the exhaust section casing, Indicates the radius of the exhaust section hub, t Indicates the maximum thickness of the support plate, N Indicates the number of support plates.

4. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 3, characterized in that: The characteristic cross section also includes a plurality of cross sections near the cross section with the maximum thickness of the support plate.

5. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 1, characterized in that: The flow rate at each characteristic cross section is calculated based on the following formula: in, Indicates the flow rate at the bottleneck point of the characteristic cross section, represents the total pressure recovery coefficient of the characteristic cross section, represents a constant determined by the physical properties of the gas, Represents the geometric area of ​​a characteristic cross section.

6. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 1, characterized in that: If the blockage flow rate of all characteristic sections is greater than the converted flow rate of the test piece outlet section, it is judged that the exhaust capacity of the exhaust section meets the requirements; if the blockage flow rate of at least one characteristic section is less than or equal to the converted flow rate of the test piece outlet section, it is judged that the exhaust capacity of the exhaust section does not meet the requirements.

7. The method for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench according to claim 1, characterized in that: The design status of the compressor test piece includes the design speed and blockage status.

8. A system for quickly evaluating the exhaust capacity of the exhaust section of a compressor test bench, characterized in that: include: A design state determination module, used to determine the design state of the compressor test piece; The CFD calculation module is used to perform CFD calculation on the test piece according to the design state of the compressor test piece, obtain the relevant parameters of the test piece outlet section, and calculate the converted flow rate of the test piece outlet section; A cross-sectional area calculation module is used to obtain the geometric parameters of each characteristic cross section of the exhaust section and calculate the area of ​​each characteristic cross section; A blockage flow calculation module is used to calculate the blockage flow of each characteristic section according to the area of ​​each characteristic section; The exhaust capacity evaluation module is used to compare the blockage flow of all characteristic sections with the converted flow of the test piece outlet section, and evaluate the exhaust capacity of the exhaust section based on the comparison results.

9. An electronic device, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor is used to execute the steps of the method according to any one of claims 1 to 7 by calling the computer program stored in the memory.

10. A computer-readable storage medium for storing a computer program for quickly evaluating the exhaust capacity of an exhaust section of a compressor test bench, characterized in that: When the computer program is run on a computer, the steps of the method according to any one of claims 1 to 7 are executed.

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