Virtual-real combined cascade test method and system

Abstract

The invention provides a virtuality and reality combined cascade test method and system, and the method comprises the steps: S1, determining a modeling proportion according to the characteristic geometric parameters of an original blade of a test piece, and carrying out the modularization of an original blade profile of the test piece and the characteristics of virtual test equipment according to the characteristic geometric parameters and the modeling proportion of the original blade and the virtual test equipment, generating a plurality of groups of virtual blade rows; s2, placing the blade row at the central position of a flow channel of virtual test equipment, and obtaining different test piece layout schemes according to different blade row mounting angles; s3, modeling is carried out according to different test piece layout schemes, a structural layout scheme and a pneumatic scheme of the test piece are obtained through simulation analysis, and the test boundary pressure of the test piece is determined; and S4, according to the test boundary pressure, generating the opening state of the valve in the virtual test equipment in each test state, and forming a test state control scheme. The blade grid test efficiency and quality are improved, and the requirements of blade profile verification and algorithm verification are met.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine and gas turbine testing, and in particular to a virtual-real combined blade cascade testing method and system. Background Art

[0002] Plane cascade tests are fundamental mechanism research tests for aircraft engines and gas turbines, used to verify and calibrate simulation software and algorithms. The tests require using Reynolds number, Mach number, and angle of attack as variables to conduct performance tests under variable operating conditions. The volume of tests is large, and simply increasing the number of physical test devices to resolve the supply-demand contradiction can no longer meet the current rapidly developing research needs. On the other hand, the development of digital technology has provided a new technical approach to improve efficiency. At present, the aviation engine industry at home and abroad has not yet formed sufficiently mature digital testing methods and technologies, and has always been in a research and development model that relies on physical testing for performance verification. Although the introduction of simulation technology to form a "design-simulation-test-optimization" technical approach has shortened the aviation engine development cycle, it still cannot solve the contradiction between the current large-scale development of engines and customized agile R&D needs. Therefore, in addition to using traditional CAE software to simulate the aerodynamic design and prediction of aviation engines, the coverage domain requirements of simulation are constantly increasing, and the requirements for the fidelity of the portrayal of real engine systems are also constantly increasing. Therefore, domestic scholars have used modeling tools such as AMEsim and Simulink to carry out research on multi-system and strongly nonlinear coupling model modeling and simulation technologies such as pipelines and fuel adjustments based on specific problems, which has improved the effectiveness of system use.

[0003] At the level of aero-engine design, in recent years, industry scholars have also carried out a series of research based on this technical point and architecture, clarifying the collaborative relationship between the digital main line, digital twin, and digital system model, and realizing the construction of simulation system models for design, processing, testing, and operation and maintenance in the management of the entire life cycle of aero-engines. Breakthroughs have been made in a series of key technologies such as lightweight modeling technology, model self-correction, and full-system model verification database technology. However, there is still a lack of integrated verification for specific application scenarios. In addition, blade cascade testing is difficult due to the large test demand and the difficulty in establishing inlet uniformity in environmental construction. It requires a large amount of simulation calculations and state control, which requires a large amount of manpower. The test efficiency needs to be improved urgently. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide a virtual-real combined blade cascade test method and system to solve the problems of low test efficiency and long test cycle in existing blade cascade tests.

[0005] The present application provides the following technical solution: a combined virtual and real cascade test method, comprising the following steps:

[0006] S1. Constructing a virtual test apparatus for a cascade test, determining a modularization ratio based on characteristic geometric parameters of an original blade of a test piece, modularizing the original blade profile of the test piece and the characteristics of the virtual test apparatus based on the characteristic geometric parameters of the original blade and the characteristic geometric parameters of the virtual test apparatus, and the modularization ratio, to generate multiple sets of virtual blade rows;

[0007] S2. placing the generated blade row at the center of the flow channel of the virtual test device, and obtaining different test piece layout schemes according to different blade row installation angles;

[0008] S3. Modeling is performed according to the different test piece layout schemes to generate a virtual fluid domain, performing simulation analysis on the virtual fluid domain to obtain the structural layout scheme and aerodynamic scheme of the test piece, and determining the test boundary pressure of the test piece;

[0009] S4. Generate the opening state of the valve in the virtual test device under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

[0010] According to one embodiment of the present application, the method further includes: processing and installing the test piece in real life according to the structural layout scheme and pneumatic scheme of the test piece to obtain a test platform; and performing physical testing on the test platform according to the structural layout scheme and pneumatic scheme of the test piece, as well as the test boundary pressure of the test piece.

[0011] According to one embodiment of the present application, the method further includes: using the test boundary pressure of the test piece and the test state control scheme as a benchmark, and setting a pressure deviation range as a warning range according to the test equipment risk analysis and emergency plan in the test requirements;

[0012] The test parameters in the physical test are compared with the parameters in the test state control scheme in real time, and the comparison result is matched with the warning range. If the comparison result is within the warning range, the test state control scheme is continued to be used.

[0013] According to an embodiment of the present application, step S1 further includes: detecting the blade thickness according to the modularized blade parameter coordinate points, and adjusting the modularization ratio so that the blade thickness and blade aspect ratio meet the test requirements.

[0014] According to one embodiment of the present application, step S2 specifically includes: determining the disk angle, upper chamber length, lower chamber length, guide plate angle and tail plate angle of the virtual test equipment according to different blade row installation angles, and obtaining the different test piece layout schemes.

[0015] According to one embodiment of the present application, in step S3, the process of simulating the virtual fluid domain includes: setting the input variables of the simulation to the length of the upper chamber, the length of the lower chamber, the guide plate angle, the tail plate angle, and the exhaust pressure in front of the guide plate, and setting the target output parameters of the simulation to the average Mach number difference on the front line of the blade row, the average intake air flow angle difference, and the average intake pressure difference.

[0016] According to an embodiment of the present application, step S3 further includes optimizing the structural layout scheme and the pneumatic scheme of the test piece according to the test requirements and the target output parameters to obtain the optimal structural layout scheme and the pneumatic scheme.

[0017] The present application also provides a virtual-real combined cascade test system, comprising:

[0018] A test piece design platform is used to construct a virtual test device for cascade testing, determine a modularization ratio based on characteristic geometric parameters of the original blades of the test piece, modularize the original blade profile of the test piece and the characteristics of the virtual test device based on the characteristic geometric parameters of the original blades and the characteristic geometric parameters of the virtual test device, and the modularization ratio, and generate multiple groups of virtual blade rows;

[0019] The test piece design platform is further used to place the generated blade row at the center of the flow channel of the virtual test device, and obtain different test piece layout solutions according to different blade row installation angles;

[0020] The test piece design platform is further used to model the different test piece layout schemes, generate a virtual fluid domain, perform simulation analysis on the virtual fluid domain, obtain the structural layout scheme and aerodynamic scheme of the test piece, and determine the test boundary pressure of the test piece;

[0021] The test control design platform is used to generate the opening state of the valve in the virtual test equipment under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

[0022] According to one embodiment of the present application, the system also includes: a physical test platform, which is used to process and install the test piece according to the structural layout plan and pneumatic plan of the test piece to obtain the test platform; and perform physical tests on the test platform according to the structural layout plan and pneumatic plan of the test piece, as well as the test boundary pressure of the test piece.

[0023] According to one embodiment of the present application, the test control design platform is further configured to use the test boundary pressure of the test piece and the test state control scheme as a benchmark, and to set a pressure deviation range as a warning range based on the test equipment risk analysis and emergency plan in the test requirements;

[0024] The system also includes: a test data management platform for comparing the test parameters in the physical test with the parameters in the test state control scheme in real time, matching the comparison result with the warning range, and if the comparison result is within the warning range, continuing to use the test state control scheme.

[0025] Compared with the existing technology, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: the embodiments of the present invention, from the perspective of digital upgrading of test subjects, propose a blade grid test method and system that combines virtual and real, further improving the efficiency and quality of the blade grid test, solving the problems of low test efficiency and long test cycle in the existing blade grid test, and quickly meeting the needs of blade shape verification and algorithm calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0027] Figure 1 1. It is a schematic flow chart of a cascade test method combining virtual and real elements according to an embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a virtual-real combined cascade test system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0031] like Figure 1 As shown, an embodiment of the present invention provides a combined virtual and real cascade test method, comprising the following steps:

[0032] S1. Constructing a virtual test apparatus for a cascade test, determining a modularization ratio based on characteristic geometric parameters of an original blade of a test piece, modularizing the original blade profile of the test piece and the characteristics of the virtual test apparatus based on the characteristic geometric parameters of the original blade and the characteristic geometric parameters of the virtual test apparatus, and the modularization ratio, to generate multiple sets of virtual blade rows;

[0033] S2. placing the generated blade row at the center of the flow channel of the virtual test device, and obtaining different test piece layout schemes according to different blade row installation angles;

[0034] S3. Modeling is performed according to the different test piece layout schemes to generate a virtual fluid domain, performing simulation analysis on the virtual fluid domain to obtain the structural layout scheme and aerodynamic scheme of the test piece, and determining the test boundary pressure of the test piece;

[0035] S4. Generate the opening state of the valve in the virtual test device under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

[0036] In some embodiments of the present invention, the method further includes: processing and installing the test piece in real life according to the structural layout scheme and pneumatic scheme of the test piece to obtain a test platform; and performing physical testing on the test platform according to the structural layout scheme and pneumatic scheme of the test piece and the test boundary pressure of the test piece.

[0037] The specific implementation also includes: storing the test piece's processing attribute parameters, information about the sensed parts, and test information. The test piece's processing attribute parameters, such as the manufacturer and processing accuracy, are stored; information about the sensed parts, such as the test piece's probe and pressure rake, is stored; information about the test piece's test channels, measurement modules, and test displacement mechanisms is stored; and according to the test piece's structural layout and pneumatic plan, the test piece is physically processed and installed on the physical test platform, and the installation status is recorded in the test data management platform for subsequent inspection and troubleshooting.

[0038] During implementation, the test was conducted using a physical test platform, following the test process. Each test condition was adjusted and test data was collected. The valve opening and corresponding boundary pressure, which met the test technical requirements, were transferred to the test data storage module for storage. This also involved retrieving simulation results from the test data storage module based on the on-site valve status and boundary pressure conditions, and displaying the valve status and post-processed flow field images in real time on the human-computer interface of the test execution module.

[0039] In some embodiments of the present invention, the method further includes: taking the test boundary pressure of the test piece and the test state control scheme as a benchmark, and setting a pressure deviation range as a warning range based on the test equipment risk analysis and emergency plan in the test requirements; comparing the test parameters in the physical test with the parameters in the test state control scheme in real time, matching the comparison result with the warning range, and if the comparison result is within the warning range, continuing to use the test state control scheme.

[0040] During the specific implementation, the pipeline pressure, valve opening, equipment safety parameter values ​​and other data during the test process are compared in real time with the parameters in the test state control plan, and the decision is made based on the deviation between the two plans:

[0041] When the deviation is <1%, the test state control plan is used; when 1%<deviation<5%, the test state control plan is revised; when the deviation is >5%, the test decision module issues an emergency stop command, and the on-site expert decides whether to continue the test based on the actual situation.

[0042] In some embodiments of the present invention, a test data management platform is used to organize test data and generate reports. According to the test client's requirements, the test process data and result data are transmitted to the test data management platform. A data analysis module is used to generate charts and determine whether to conduct repeatable tests. Finally, a test report is generated.

[0043] In some embodiments of the present invention, step S1 further includes: detecting the blade thickness according to the modularized blade parameter coordinate points, and adjusting the modularization ratio so that the blade thickness and blade aspect ratio meet the test requirements.

[0044] In specific implementation, step S1 includes the following steps:

[0045] S1.1: Obtain the chord length b, pitch t, ​​inlet airflow angle β1, and original blade coordinate points of the original blade profile, as well as the tester air outlet length L and width W. Structure these parameters and input them into the test piece design module. The system will calculate the appropriate number of blades N. The calculation principle is that t is an integer, the aspect ratio should not be less than 2, and the minimum should not be less than 1.8.

[0046] S1.2: Determine the blade modeling ratio n based on the number of blades, and scale up or down the other physical properties of the test piece in the same proportion.

[0047] S1.3: Based on the blade parameter coordinate points after modeling, use the blade thickness detection function to make a preliminary judgment on the blade strength after modeling. The maximum thickness of the blade should be no less than 3mm. If it is not satisfied, return to S1.1, reduce the number of blades to N-1, and recalculate the modeling ratio until the maximum thickness is no less than 3mm.

[0048] S1.4: Using the coordinate transformation function, the program generates N blade profiles along the Y direction according to the calculated number of blades N. The interval length between the N blade profiles is n×t, forming a blade row. The blade coordinates are rotated by an angle β1 to generate the rotated coordinates, ensuring that the installation angle is correct. Finally, a .scr script file is generated.

[0049] S1.5: Import the .scr file into CAD software to generate blade rows.

[0050] In some embodiments of the present invention, step S2 specifically includes: determining the disk angle, upper chamber length, lower chamber length, guide plate angle and tail plate angle of the virtual test equipment according to different blade row installation angles, and obtaining the different test piece layout schemes.

[0051] In specific implementation, step S2 includes the following steps:

[0052] S2.1: Use CAD software to obtain the center points of the N blade leading edge connection lines and align the center points with the flow channel center. At the same time, determine the lengths Lup and Ldown of the upper and lower stabilization chambers for the wind tunnel, and the angles β of the upper and lower stabilization chamber guide vanes. up , β down , forming layout plan 1.

[0053] S2.2: Use CAD software to rotate the blade row to different angles according to the center point of the test piece mounting disk. n , get each angle i n Length of upper and lower chambers of the wind tunnel L up , L down , forming layout schemes 2 to n.

[0054] S2.3: Export layout schemes 1 to n as .dwg format files.

[0055] In some embodiments of the present invention, in step S3, simulating the virtual fluid domain includes setting the simulation input variables to the length of the upper chamber, the length of the lower chamber, the deflector angle, the tail plate angle, and the exhaust pressure before the deflector, and setting the simulation target output parameters to the average Mach number difference on the blade row front line, the average intake airflow angle difference, and the average intake pressure difference. Step S3 also includes optimizing the structural layout and aerodynamic scheme of the test piece based on the test requirements and the target output parameters to obtain the optimal structural layout and aerodynamic scheme.

[0056] In specific implementation, step S3 includes the following steps:

[0057] S3.1: Use UG NX software to import layout schemes 1 to n and generate the fluid domain. The optimization variable is the length L of the upper and lower chambers.up 、L down , angles of upper and lower stationary guide plates β up , β down , the exhaust pressure P before the upper and lower stationary chamber guide plates up 、P down The optimization target parameters are the average Mach number difference, average velocity direction angle difference and average pressure difference on the parallel frontal line in front of the cascade.

[0058] S3.2: Based on Isight software, an optimization process is built. The process is divided into four parts: grid generation, numerical solution, post-processing, and data post-processing.

[0059] S3.3: The grid is generated using the grid parameterization method.

[0060] S3.4: The numerical solution uses quasi-three-dimensional solution technology.

[0061] S3.5: Post-processing uses CFD-Post parameterization.

[0062] S3.6: Use the data post-processing module to calculate the achievement of target parameters.

[0063] S3.7: Based on the data post-processing, provide the layout and aerodynamic solutions for the optimal target parameters, and provide the inlet and outlet boundary pressures required for the test.

[0064] During specific implementation, the method further includes the following steps:

[0065] S4.1: Enter the attribute parameters of the test piece into the test data storage module, specifically including information such as the processing method and processing parameters.

[0066] S4.2: Enter information such as the sensitive portion of the test piece into the test data storage module, specifically including the validity period of the sensitive portion, the effective use range, the stepping plan of the sensitive portion, etc.

[0067] S4.3: Enter the test channel information of the test piece into the test data storage module, specifically including the validity period, applicable range, accuracy, etc. of each pressure and temperature measurement module.

[0068] S4.4: Perform physical fabrication and installation of the test piece according to the test piece layout plan and pneumatic plan, and enter the installation status into the test data management platform, specifically including installation steps, operating procedures, and specific installation parameters.

[0069] During specific implementation, the method further includes the following steps:

[0070] S5.1: Utilize the equipment state control model and, based on the inlet and outlet boundary pressures given in S3.7, generate the valve opening state under each test state. Specifically, determine the valve stroke, the opening and closing sequence of each valve, and the valve opening and closing rate to maintain the stability of the test state and form a test state control plan.

[0071] S5.2: Transmit the valve opening and the corresponding boundary pressure in each state to the test data storage module.

[0072] During specific implementation, the method further includes the following steps:

[0073] S6.1: Test warning value setting: Take the test boundary pressure and valve opening plan as the benchmark, and set the deviation value ±5% as the warning value.

[0074] S6.2: Transmit the warning value to the test data storage module for data storage and utilization.

[0075] During specific implementation, the method further includes the following steps:

[0076] S7.1: During the test, the test data management platform sends the control scheme to the test execution module. The test execution module adjusts the valve state to the design state of the corresponding control scheme in accordance with the provisions of the test control scheme to achieve the adjustment of test condition 1. If the required state cannot be achieved according to the control scheme, the tester PID automatic control is used to achieve state adjustment. After the adjustment is completed, the sensing part is moved according to the sensing part stepping scheme to collect the pressure signal.

[0077] S7.2: Transmit the valve opening and boundary pressure values ​​when the actual state is reached to the test data storage module.

[0078] S7.3: According to the valve state and the inlet and outlet boundary pressures, the corresponding flow field simulation results calculated in S3.7 stored in the test data storage module are retrieved. The inlet and outlet boundary pressures are used as triggers to visualize the valve state and flow field on the display screen of the test execution module.

[0079] During specific implementation, the method further includes the following steps:

[0080] S8.1: During the test, test safety-related parameters such as pipeline pressure and valve opening value are transmitted to the test decision module in real time for comparison with the control strategies of S3.7 and S5.1.

[0081] S8.2: When the actual pressure differs from the simulated pressure, the following criteria are recommended: When the deviation is <1%, the subsequent test state will continue to use the current plan. When the deviation is <1% <5%, the test data management platform will transfer the actual control plan to the test state control plan design module, use the data to modify the control model, and retransmit the modified control plan to the test data management platform, overwriting the previous plan and providing further operational guidance. When the deviation is >5% and reaches the warning setpoint, the judgment system will provide the specific location of the pressure difference and a time history diagram. If the pipeline pressure reaches the warning value, the test decision module will issue a command to directly switch to the emergency stop state, sending an emergency exit command to the valve and other actuators to exhaust the airflow from the test section. For abnormalities at the test piece pressure measuring point not related to test safety, the test expert will decide whether to continue the test. After the decision is made, the test execution module will issue a command to continue or stop the test.

[0082] S8.2: Repeat S7.1 to S8.2 until all states are completed.

[0083] During specific implementation, the method further includes the following steps:

[0084] S9.1: Transmit the final plan's test control data, pipeline pressure data, test piece test parameters, and other data to the test data management platform in the specified format.

[0085] S9.2: Generate charts of test data according to test requirements, and use charts and other analysis to mark abnormal data quality and decide whether to repeat the test to verify abnormal conditions.

[0086] S9.3: Analyze the organized data and generate a test report using the data management platform.

[0087] like Figure 2 As shown, an embodiment of the present invention further provides a virtual-real combined cascade test system, comprising:

[0088] A test piece design platform is used to construct a virtual test device for cascade testing, determine a modularization ratio based on characteristic geometric parameters of the original blades of the test piece, modularize the original blade profile of the test piece and the characteristics of the virtual test device based on the characteristic geometric parameters of the original blades and the characteristic geometric parameters of the virtual test device, and the modularization ratio, and generate multiple groups of virtual blade rows;

[0089] The test piece design platform is further used to place the generated blade row at the center of the flow channel of the virtual test device, and obtain different test piece layout solutions according to different blade row installation angles;

[0090] The test piece design platform is further used to model the different test piece layout schemes, generate a virtual fluid domain, perform simulation analysis on the virtual fluid domain, obtain the structural layout scheme and aerodynamic scheme of the test piece, and determine the test boundary pressure of the test piece;

[0091] The test control design platform is used to generate the opening state of the valve in the virtual test equipment under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

[0092] In some embodiments of the present invention, the system also includes: a physical test platform, which is used to process and install the test piece according to the structural layout plan and pneumatic plan of the test piece to obtain a test platform; and perform physical tests on the test platform according to the structural layout plan and pneumatic plan of the test piece, as well as the test boundary pressure of the test piece.

[0093] In some embodiments of the present invention, the test control design platform is also used to take the test boundary pressure of the test piece and the test state control scheme as a benchmark, and set the pressure deviation range as a warning range based on the test equipment risk analysis and emergency plan in the test requirements; the system also includes: a test data management platform, which is used to compare the test parameters in the physical test with the parameters in the test state control scheme in real time, and match the comparison results with the warning range. If the comparison results are within the warning range, the test state control scheme is continued to be used.

[0094] The embodiment of the present invention provides a blade cascade test system that combines virtual and real elements. The system mainly includes a test piece design platform, a test control design platform, a physical test platform, and a test data management platform. The test piece design platform has test piece modeling, test piece layout scheme design, and test piece aerodynamic design modules; the test control design platform has test state control scheme design and test early warning modules; the physical experiment platform has test piece processing parameter entry, test piece installation state perception, test piece sensing part state perception, and test execution modules; the test data management platform has test data storage, test data chart generation, and test report generation modules. It can be used to implement a full-process application from test design, test execution, and test data analysis and delivery. The embodiment of the present invention improves the efficiency and quality of blade cascade tests, solves the problems of low test efficiency and long test cycles in existing blade cascade tests, and quickly meets the needs of blade profile verification and algorithm calibration.

[0095] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A cascade test method combining virtual and real, characterized in that: The following steps are involved: S1. Constructing a virtual test apparatus for a cascade test, determining a modularization ratio based on characteristic geometric parameters of an original blade of a test piece, modularizing the original blade profile of the test piece and the characteristics of the virtual test apparatus based on the characteristic geometric parameters of the original blade and the characteristic geometric parameters of the virtual test apparatus, and the modularization ratio, to generate multiple sets of virtual blade rows; S2. placing the generated blade row at the center of the flow channel of the virtual test device, and obtaining different test piece layout schemes according to different blade row installation angles; S3. Modeling is performed according to the different test piece layout schemes to generate a virtual fluid domain, performing simulation analysis on the virtual fluid domain to obtain the structural layout scheme and aerodynamic scheme of the test piece, and determining the test boundary pressure of the test piece; S4. Generate the opening state of the valve in the virtual test device under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

2. The virtual-real combined cascade test method according to claim 1, characterized in that: The method further comprises: According to the structural layout plan and pneumatic plan of the test piece, the test piece is processed and installed to obtain a test platform; according to the structural layout plan and pneumatic plan of the test piece and the test boundary pressure of the test piece, a physical test is carried out on the test platform.

3. The virtual-real combined cascade test method according to claim 2, characterized in that: The method further comprises: Taking the test boundary pressure of the test piece and the test state control plan as a benchmark, and according to the test equipment risk analysis and emergency plan in the test requirements, setting a pressure deviation range as a warning range; The test parameters in the physical test are compared with the parameters in the test state control scheme in real time, and the comparison result is matched with the warning range. If the comparison result is within the warning range, the test state control scheme is continued to be used.

4. The virtual-real combined cascade test method according to claim 1, characterized in that: Step S1 also includes: detecting the blade thickness according to the modularized blade parameter coordinate points, and adjusting the modularization ratio so that the blade thickness and blade aspect ratio meet the test requirements.

5. The virtual-real combined cascade test method according to claim 1, characterized in that: Step S2 specifically includes: determining the disk angle, upper chamber length, lower chamber length, guide plate angle and tail plate angle of the virtual test equipment according to different blade row installation angles, and obtaining the different test piece layout schemes.

6. The virtual-real combined cascade test method according to claim 1, characterized in that: In step S3, the process of simulating the virtual fluid domain includes: setting the simulation input variables to the length of the upper resident chamber, the length of the lower resident chamber, the guide plate angle, the tail plate angle, and the exhaust pressure before the guide plate; setting the simulation target output parameters to the average Mach number difference on the front line of the blade row, the average intake airflow angle difference, and the average intake pressure difference.

7. The virtual-real combined cascade test method according to claim 6, characterized in that: Step S3 also includes optimizing the structural layout scheme and the pneumatic scheme of the test piece according to the test requirements and the target output parameters to obtain the best structural layout scheme and the pneumatic scheme.

8. A virtual and real combined cascade test system, characterized in that: include: A test piece design platform is used to construct a virtual test device for cascade testing, determine a modularization ratio based on characteristic geometric parameters of the original blades of the test piece, modularize the original blade profile of the test piece and the characteristics of the virtual test device based on the characteristic geometric parameters of the original blades and the characteristic geometric parameters of the virtual test device, and the modularization ratio, and generate multiple groups of virtual blade rows; The test piece design platform is further used to place the generated blade row at the center of the flow channel of the virtual test device, and obtain different test piece layout solutions according to different blade row installation angles; The test piece design platform is further used to model the different test piece layout schemes, generate a virtual fluid domain, perform simulation analysis on the virtual fluid domain, obtain the structural layout scheme and aerodynamic scheme of the test piece, and determine the test boundary pressure of the test piece; The test control design platform is used to generate the opening state of the valve in the virtual test equipment under each test state according to the determined test boundary pressure of the test piece, and form a test state control plan.

9. The virtual-real combined cascade test system according to claim 8, characterized in that: The system further comprises: A physical test platform is used to process and install the test piece according to the structural layout plan and pneumatic plan of the test piece to obtain the test platform; and to perform physical tests on the test platform according to the structural layout plan and pneumatic plan of the test piece and the test boundary pressure of the test piece.

10. The virtual-real combined cascade test system according to claim 8, characterized in that: The test control design platform is further used to set a pressure deviation range as a warning range based on the test boundary pressure of the test piece and the test state control plan as a benchmark and according to the test equipment risk analysis and emergency plan in the test requirements; The system also includes: a test data management platform for comparing the test parameters in the physical test with the parameters in the test state control scheme in real time, matching the comparison result with the warning range, and if the comparison result is within the warning range, continuing to use the test state control scheme.

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