A method for obtaining the characteristics of a high-pressure compressor under the simulated working environment of a complete machine

Abstract

The present application provides a method for obtaining the characteristics of a high-pressure compressor under a simulated whole-machine working environment, belonging to the field of aero-engine tests. The method includes: predicting the initial adjustment state of key adjustment variables in the test of a twin-spool compressor tester; under the series installation state of the fan and the high-pressure compressor, correcting the parameters of the fan outlet or the high-pressure compressor inlet section to obtain the corrected fan pressure ratio and efficiency, and calculating the high-pressure compressor characteristic parameters including the corrected fan outlet total pressure and total temperature based on the corrected fan pressure ratio and efficiency; controlling the states of the fan and the high-pressure compressor based on the characteristic parameters, adjusting the initial state of the test according to the initial adjustment state of the key adjustment variables, and adjusting it to the reference state; carrying out the acquisition of the high-pressure compressor characteristics in the reference state to obtain the high-pressure compressor characteristic curve. The present application can simulate the non-uniform distribution of the fan outlet flow field and the tip clearance state of the high-pressure compressor under the whole-machine state.

Description

Technical Field

[0001] This application belongs to the field of aero-engine tests, and particularly relates to a method for obtaining the characteristics of a high-pressure compressor under a simulated whole-engine operating environment. Background Art

[0002] At present, the characteristics of high-pressure compressors are mostly obtained through separate component tests (with uniform inlet conditions). However, there are certain deviations between the characteristics of actual high-pressure compressors in the whole-engine operating environment and those of separate component tests. These deviations are caused by factors such as non-uniform distribution of the fan outlet flow field and differences in the compressor tip clearance state. To study the characteristic matching of high-pressure compressors in the whole-engine operating environment, a large number of whole-engine matching verification tests are usually required to obtain their optimal matching characteristics. However, in whole-engine tests, conducting a large number of high-pressure compressor characteristic optimization verifications has a long verification cycle, high test risks, and few freely adjustable variables in whole-engine tests, with limited verification states. Summary of the Invention

[0003] The purpose of this application is to provide a method for obtaining the characteristics of a high-pressure compressor under a simulated whole-engine operating environment to solve or mitigate at least one problem in the background art.

[0004] The technical solution of this application is: A method for obtaining the characteristics of a high-pressure compressor under a simulated whole-engine operating environment, which is implemented based on a twin-spool compressor test rig. The method includes:

[0005] Estimate the initial adjustment states of key adjustment variables in the test of the twin-spool compressor test rig. The key adjustment variables include the speeds of the fan and the high-pressure compressor, the angles of the adjustable stator vanes of the fan and the high-pressure compressor, the states of the inlet throttle device, the core throttle device, and the bypass throttle device;

[0006] When the fan and the high-pressure compressor are in a series installation state, correct the parameters of the fan outlet or the high-pressure compressor inlet section to obtain the corrected fan pressure ratio and fan efficiency. Calculate the corrected total pressure and total temperature at the fan outlet based on the corrected fan pressure ratio and fan efficiency, thereby realizing the correction of the high-pressure compressor characteristic parameters;

[0007] Control the states of the fan and the high-pressure compressor based on the characteristic parameters. According to the initial adjustment states of the key adjustment variables, adjust the initial test state in sequence according to the speeds of the fan and the high-pressure compressor, the angles of the adjustable stator vanes, the states of the inlet throttle device, the core throttle device, and the bypass throttle device, and adjust to the recorded reference state;

[0008] Carry out the acquisition of the high-pressure compressor characteristics in the reference state to obtain the high-pressure compressor characteristic curve.

[0009] Preferably, the rotational speeds of the fan and the high-pressure compressor and the angles of the adjustable stator vanes of the fan and the high-pressure compressor are consistent with the matching under the whole-machine operating environment.

[0010] Preferably, the process of estimating the state of the intake throttle device among the key adjustment variables includes:

[0011] Estimate the driving power P and torque M according to the characteristic parameters of the fan and the high-pressure compressor:

[0012] ;

[0013] In the formula, is the air specific heat ratio, is the converted flow rate, is the inlet total temperature, is the pressure ratio, is the efficiency, is the specific heat ratio;

[0014] ;

[0015] In the formula, is the converted rotational speed;

[0016] Combine the power and torque limits at each rotational speed of the first driving device and the second driving device to determine the required inlet throttle ratio for the test:

[0017] ;

[0018] In the formula, is the power and torque after throttling, J is the inlet throttle ratio;

[0019] Determine the corresponding flow area of the intake throttle device according to the relationship between the flow area of the intake throttle device at different flow rates and the throttle ratio.

[0020] Preferably, the process of estimating the states of the internal flow throttle device and the external flow throttle device is as follows:

[0021] Estimate the areas of the internal flow throttle device and the external flow throttle device according to the throat areas of the exhaust flow paths of the fan and the high-pressure compressor, and the flow areas of the internal flow throttle device and the external flow throttle device are determined according to 95%-100% of the throat area.

[0022] Preferably, the process of calculating the corrected fan outlet total pressure and total temperature based on the corrected fan pressure ratio and fan efficiency includes:

[0023] Determine the correction coefficients of the corrected fan pressure ratio and fan efficiency based on the single-component test of the fan or combined with CFD simulation, and calculate the corrected fan pressure ratio and fan efficiency based on the correction coefficients:

[0024] ;

[0025] ;

[0026] Wherein, and are the corrected fan pressure ratio and fan efficiency, and are the fan pressure ratio and fan efficiency obtained based on instrument measurement in the dual - shaft state, and are the correction coefficients of the fan pressure ratio and fan efficiency;

[0027] Calculate the characteristic parameters for controlling the high - pressure compressor state based on the corrected fan pressure ratio and fan efficiency, and the characteristic parameters include the total pressure and total temperature at the fan outlet:

[0028] ;

[0029] ;

[0030] Wherein, and are the corrected total pressure and total temperature at the fan outlet, and are the total pressure and total temperature at the fan inlet.

[0031] Preferably, the recorded reference state is consistent with the matching state of the whole machine, and the consistent matching state means that the state points of the fan and the high - pressure compressor are both on the common operating line.

[0032] Preferably, in the process of obtaining the high - pressure compressor characteristic curve by conducting the high - pressure compressor characteristic acquisition with the reference state, first adjust the internal - flow throttling device to change the flow area of the internal - flow exhaust device for the acquisition of the high - pressure compressor characteristic curve. The number of state points for the acquisition of the high - pressure compressor characteristic curve is not less than 7 points, including at least the blocking point, the operating point, the highest - efficiency point, and the surge point. After each state point on the characteristic curve is stable, conduct state - point acquisition. During the acquisition of the characteristic curve, when the deviation of the relative corrected speed of the high - pressure compressor from the reference state is greater than a predetermined value, adjust the fan state point to make the relative corrected speed of the high - pressure compressor stable.

[0033] Preferably, it further includes:

[0034] Conduct an experiment on the influence of adjustable variables on the matching characteristics with the reference state, and conduct state - point or characteristic - curve acquisition under the condition of adjusting a single adjustable variable.

[0035] The method for obtaining the characteristics of a high-pressure compressor under a simulated overall machine working environment proposed in this application can simulate the non-uniform distribution of the flow field at the fan outlet and the tip clearance state of the high-pressure compressor under the overall machine state compared with the existing single-component test of the high-pressure compressor with uniform inlet conditions. The characteristics of the high-pressure compressor obtained under the test state are closer to those of the high-pressure compressor under the overall machine environment, improving the support for the overall machine matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] To more clearly illustrate the technical solutions provided in this application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0037] Figure 1 Schematic diagram of the two-spool compressor tester in this application.

[0038] Figure 2 Schematic diagram of the method for obtaining the characteristics of a high-pressure compressor under a simulated overall machine working environment in this application.

[0039] Figure 3 Schematic diagram of the characteristic curve of a certain relative conversion speed of the high-pressure compressor in an embodiment of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] To make the purpose, technical solutions, and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the drawings in the embodiments of this application.

[0041] Aiming at the problems and disadvantages that there are differences between the characteristics obtained from the high-pressure compressor component test and the characteristics in the real overall machine environment in the prior art, there is a lack of multi-degree-of-freedom adjustment in the overall machine verification, and the test risk is high, etc., this application proposes a method for obtaining the characteristics of a high-pressure compressor under a simulated overall machine working environment based on a two-spool compressor tester. By conducting the verification of the characteristics of the high-pressure compressor in the series installation state of the fan, the intermediate casing, and the high-pressure compressor on the two-spool compressor tester, the characteristics of the high-pressure compressor under the simulated overall machine working environment are obtained, so as to simulate the overall machine working environment in the component-level test, and the verification of the influence of multi-degree-of-freedom variable adjustment on the performance of the high-pressure compressor can be realized.

[0042] As Figure 1 shown in the schematic diagram of the two-spool compressor tester, the two-spool compressor tester 100 includes an intake system 10, a test piece 20, an exhaust system 30, a speed increaser 40, a power device 50, and an angle adjustment device 60.

[0043] Among them, the intake system 10 includes an intake flow measurement device 11, an intake throttle device 12, a pressure stabilizing device 13, and an intake adapter section 14. The intake flow measurement device 11 is connected to the intake throttle device 12 through a pipeline. The intake throttle device 12 (the inlet throttle ratio can be changed by adjusting the flow area of the intake throttle device 12) is connected to the pressure stabilizing device 13 through a pipeline. The pressure stabilizing device 13 is connected to the fan 21 of the test piece 20 through the intake adapter section 14.

[0044] The test piece 20 includes a fan 21, an intermediate casing 22, and a high-pressure compressor 23. The fan 21, the intermediate casing 22, and the high-pressure compressor 23 are connected together to form the test piece 20. The intermediate casing 22 is divided into an outer bypass duct 221 and an inner bypass duct 222.

[0045] The exhaust system 30 includes an outer bypass throttle device 31, an outer bypass exhaust device 32, an inner bypass throttle device 33, and an inner bypass exhaust device 34. The outer bypass throttle device 31 and the outer bypass exhaust device 32 are sequentially arranged on the outlet side of the outer bypass duct 221. The inner bypass throttle device 33 and the inner bypass exhaust device 34 are sequentially arranged on the outlet side of the inner bypass duct 222.

[0046] The air flow enters the intermediate casing 22 after passing through the fan 21. A part of the air flow is discharged into the atmosphere after passing through the outer bypass duct 221, the outer bypass throttle device 31, and the outer bypass exhaust device 32. A part of the air flow enters the high-pressure compressor 23 through the inner bypass duct 222 and is finally discharged into the atmosphere through the inner bypass throttle device 33 and the inner bypass exhaust device 34 after being pressurized by the high-pressure compressor 23.

[0047] The driving device 50 includes a first driving device 51 and a second driving device 52. The first driving device 51 and the second driving device 52 are respectively driven by a speed increaser 40 to drive the fan shaft 211 and the high-pressure compressor shaft 231, thereby driving the fan 21 and the high-pressure compressor 23 to rotate. Among them, the blades of the fan 21 and the high-pressure compressor 23 include adjustable stator blades, non-adjustable stator blades, and rotor blades. The adjustable stator blades are adjusted and controlled by an angle adjustment device 60.

[0048] Based on the above-mentioned two-spool compressor tester 100, the present application provides a method for obtaining the characteristics of a high-pressure compressor under a simulated whole-machine working environment, as Figure 2 shown. The method includes:

[0049] S10, estimating the initial adjustment state of the key adjustment variables in the test of the two-spool compressor tester. The key adjustment variables include the speeds of the fan and the high-pressure compressor, the angles of the adjustable stator blades of the fan and the high-pressure compressor, the state of the intake throttle device, and the state of the inner / outer bypass throttle device.

[0050] Among them, the speeds and the angles of the adjustable stator blades of the fan and the high-pressure compressor are kept consistent with the matching under the whole-machine working environment.

[0051] Determination of the state of the intake throttle device 12: Estimate the driving power and torque based on the characteristic parameters (converted speed, converted flow rate, pressure ratio, efficiency) of the fan and the high-pressure compressor. The driving power is calculated according to Formula 1:

[0052] ; (1)

[0053] In the formula, is the specific heat ratio of air, generally taking a value of 1.004 kJ / (kg·K); is the converted flow rate, kg / s; is the total inlet temperature, generally taking 288.15K; is the pressure ratio; is the efficiency; is the specific heat (capacity) ratio, taking 1.4 at normal temperature.

[0054] Considering the incompleteness of the total inlet temperature and the calculated characteristics, take 1.2 times the calculation result of Formula (1) as the estimated driving power. The torque M is calculated according to Formula 2:

[0055] ; (2)

[0056] In the formula, is the converted speed.

[0057] Considering that the driving power of the estimated fan and high-pressure compressor is relatively large and inlet throttling is required, determine the required inlet throttling ratio for the test in combination with the power and torque limits at each speed of the first driving device 51 and the second driving device 52 as: , where in the formula, is the power and torque after throttling, J is the inlet throttling ratio.

[0058] Determine the corresponding flow area of the intake throttle device 12 according to the relationship between the flow area and the throttling ratio of the intake throttle device 12 at different flow rates.

[0059] Determination of the state of the inner / outer bypass throttle device: Estimate the areas of the inner bypass throttle device 33 and the outer bypass throttle device 31 according to the throat (minimum) area of the exhaust flow paths of the fan 21 and the high-pressure compressor 23 in the test piece 20. Usually, determine the flow area of the inner / outer bypass throttle device according to 95%-100% of the throat area.

[0060] S20. In the series installation state of the fan and the high-pressure compressor, correct the cross-section parameters at the fan outlet or the high-pressure compressor inlet to obtain the corrected fan pressure ratio and fan efficiency, and calculate the corrected fan outlet total pressure and total temperature based on the corrected fan pressure ratio and fan efficiency, so as to realize the correction of the high-pressure compressor characteristic parameters.

[0061] In the series assembly state of the fan and the high-pressure compressor, in order to avoid the influence of too many instruments arranged at the fan outlet on the flow field, a small number of instruments are often arranged at the fan outlet. In order to accurately characterize the aerodynamic state at the fan outlet or the high-pressure compressor inlet with a small number of instruments, it is necessary to correct the parameters of this section.

[0062] In some embodiments of the present application, the correction coefficients of the corrected fan pressure ratio and fan efficiency can be determined based on the single-component test of the fan or combined with CFD simulation, and the corrected fan pressure ratio and fan efficiency are calculated through Formula 3 and Formula 4:

[0063] ; (3)

[0064] ; (4)

[0065] In the formula, 、 are the corrected fan pressure ratio and fan efficiency, 、 are the fan pressure ratio and fan efficiency obtained based on the measurement of a small number of instruments in the two-shaft state, 、 are the correction coefficients of the fan pressure ratio and fan efficiency.

[0066] Use the corrected fan pressure ratio and fan efficiency as the characteristic parameters for controlling the fan state during the test, and use the corrected total pressure and total temperature at the fan outlet as the inlet parameters of the high-pressure compressor, and calculate the characteristic parameters for controlling the high-pressure compressor state (i.e., the total pressure and total temperature at the fan outlet) according to this parameter:

[0067] ; (5)

[0068] ; (6)

[0069] In the formula, 、 are the corrected total pressure and total temperature at the fan outlet, 、 are the total pressure and total temperature at the fan inlet.

[0070] S30. Control the states of the fan and the high-pressure compressor according to the characteristic parameters determined in step S20. According to the initial adjustment state of the key adjustment variables in the test determined in step S10, adjust the initial state of the test in turn in the order of the fan and high-pressure compressor speeds, the angles of the adjustable stator vanes, the states of the intake throttle devices, and the states of the inner / outer bypass throttle devices.

[0071] Adjust to the reference state for admission, and the reference state for admission is consistent with the matching state of the whole machine (usually the common working line) to ensure consistency with the working environment of the whole machine. During the adjustment process, for a small bypass ratio engine (bypass ratio less than 1), the internal flow throttle device 33 is preferentially adjusted to reduce the flow area of the internal exhaust device 34 (the adjustment step is 0.5%-1.0% of the maximum flow area of the internal exhaust device 34). The pressure ratios of the fan and the high-pressure compressor gradually increase, making the states of the high-pressure compressor and the fan approach the common working line. Then, the external flow throttle device 31 is adjusted (the adjustment step is 0.5%-1.0% of the maximum flow area of the external exhaust device 32), so that the state points of both the fan and the high-pressure compressor are on the common working line (the accuracy requirement for the state point control: pressure ratio deviation ≤ 0.5%).

[0072] S40. Conduct a high-pressure compressor characteristic admission test to obtain the high-pressure compressor characteristic curve.

[0073] Based on the reference state in step S30, conduct a high-pressure compressor characteristic admission. Slowly adjust the internal flow throttle device 33 to change the flow area of the internal exhaust device 34 (the adjustment step is 0.1%-0.5% of the maximum flow area of the internal exhaust device 34) for high-pressure compressor characteristic admission. The number of state points for high-pressure compressor characteristic admission is not less than 7 points, covering the blocked point, working point, highest efficiency point, and surge point. Each state point on the characteristic curve should be fully stable (the fluctuation of the corrected speed of the high-pressure compressor ≤ 10 r / min, the fluctuation of the corrected flow rate of the high-pressure compressor ≤ 0.5%, and the fluctuation of the pressure ratio of the high-pressure compressor ≤ 0.3%) before the state point is collected. During the characteristic admission process, when the deviation of the relative corrected speed of the high-pressure compressor from the reference state > 0.2%, adjust the fan state point to make the relative corrected speed of the high-pressure compressor stable (the deviation from the reference state ≤ 0.2%).

[0074] As Figure 3 shown is a schematic diagram of the characteristic curve L2 of a certain relative corrected speed of the high-pressure compressor in an embodiment of the present application. The blocked point P1 is the state point with a relatively low pressure ratio of the high-pressure compressor. The working point P2 is the state point on the common working line L1. The highest efficiency point P3 is the state point with the highest efficiency. The surge point P4 is the state point where the high-pressure compressor becomes unstable. The instability of the high-pressure compressor is monitored through the pressure pulsation measurement points. Pressure pulsation measurement points need to be arranged at the inter-stage and outlet positions of each stage of the fan and the high-pressure compressor.

[0075] S50. Conduct an experiment on the influence of adjustable variables on the matching characteristics, and record the state points or characteristic curves under the condition of single adjustable variable adjustment.

[0076] Taking step S30 as the reference state, an experiment on the influence of adjustable variables on the matching characteristics is carried out. The relative conversion speed of the fan is adjusted and changed through the first driving device 51, the adjustable stator vane angle of the fan is adjusted and changed through the angle adjusting device 60, and the pressure ratio of the fan 21 is changed by adjusting the flow area of the outer bypass throttling device 31. The adjustment ranges of each variable in the matching characteristic influence experiment are determined according to the adjustment ranges of the above variables during the whole machine matching use. The adjustment ranges of the variables in the matching characteristic influence experiment cover 120% of the whole machine use range. The acquisition of state points or characteristic curves is carried out under the state of single adjustable variable adjustment. The acquisition of state points is carried out after the state is fully stable, and the acquisition of characteristic curves is the same as that of the high-pressure compressor characteristic acquisition experiment.

[0077] The method for acquiring the high-pressure compressor characteristics under the simulated whole machine working environment proposed in this application is realized by using a two-spool compressor tester in the series installation state of the fan, the intermediate casing and the high-pressure compressor. Compared with the existing single-component test of the high-pressure compressor (uniform inlet conditions), it can realize the non-uniform distribution of the fan outlet flow field and the simulation of the tip clearance state of the high-pressure compressor under the whole machine state. The high-pressure compressor characteristics obtained under the test state are closer to the high-pressure compressor characteristics under the whole machine environment, improving the support for the whole machine matching.

[0078] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A method for obtaining the characteristics of a high-pressure compressor under the working environment of a simulated whole machine, which is realized based on a twin-spool compressor tester, is characterized in that The method includes: Estimating the initial adjustment states of key adjustment variables during the test of a twin-spool compressor tester, where the key adjustment variables include the speeds of the fan and the high-pressure compressor, the angles of the adjustable stator vanes of the fan and the high-pressure compressor, the states of the inlet throttle device, the core throttle device, and the bypass throttle device; When the fan and the high-pressure compressor are in a series-mounted state, correcting the parameters of the fan outlet or the high-pressure compressor inlet section to obtain the corrected fan pressure ratio and fan efficiency, and calculating the corrected total pressure and total temperature at the fan outlet based on the corrected fan pressure ratio and fan efficiency, so as to achieve the correction of the high-pressure compressor characteristic parameters; Based on the characteristic parameters, controlling the states of the fan and the high-pressure compressor. According to the initial adjustment states of the key adjustment variables, sequentially adjust the initial test state in the order of the speeds of the fan and the high-pressure compressor, the angles of the adjustable stator vanes, the state of the inlet throttle device, the state of the core throttle device, and the state of the bypass throttle device, and adjust it to the recorded reference state; Carry out the high-pressure compressor characteristic recording with the reference state to obtain the high-pressure compressor characteristic curve.

2. The method for recording the characteristics of a high-pressure compressor under the simulated whole-machine working environment according to claim 1, wherein, The matching of the speeds of the fan and the high-pressure compressor and the angles of the adjustable stator vanes of the fan and the high-pressure compressor is kept consistent with the whole machine working environment.

3. The method for recording the characteristics of a high-pressure compressor under an analog whole-machine working environment according to claim 1 or 2, wherein The process of estimating the state of the inlet throttle device among the key adjustment variables includes: Estimating the driving power P and torque M according to the characteristic parameters of the fan and the high-pressure compressor: ； Wherein, is the specific heat ratio of air, is the converted flow rate, is the total inlet temperature, is the pressure ratio, is the efficiency, is the specific heat ratio; ； In the formula, is the converted speed; Combining the power and torque limits at each speed of the first driving device and the second driving device to determine the required inlet throttle ratio for the test: ； In the formula, is the power and torque after throttling, J is the inlet throttling ratio; Determine the corresponding flow area of the inlet throttle device according to the relationship between the flow area of the inlet throttle device at different flows and the throttle ratio.

4. The method for recording the characteristics of a high-pressure compressor under an analog full-machine working environment according to claim 3, characterized in that The state estimation process of the core throttle device and the bypass throttle device is: Estimate the areas of the core throttle device and the bypass throttle device according to the throat areas of the exhaust flow paths of the fan and the high-pressure compressor, and the flow areas of the core throttle device and the bypass throttle device are determined according to 95%-100% of the throat area.

5. The method for obtaining the characteristics of a high-pressure compressor under the simulated whole-machine working environment according to claim 4, characterized in that, The process of calculating the corrected total pressure and total temperature at the fan outlet based on the corrected fan pressure ratio and fan efficiency includes: Determine the correction coefficients of the corrected fan pressure ratio and fan efficiency based on the single-component test of the fan or combined with CFD simulation, and calculate the corrected fan pressure ratio and fan efficiency based on the correction coefficients: ； ； Wherein, and are the corrected fan pressure ratio and fan efficiency, and are the fan pressure ratio and fan efficiency obtained based on instrument measurement under the two-shaft state, and are the correction factors for the fan pressure ratio and fan efficiency; Calculate the characteristic parameters for the high-pressure compressor state control based on the corrected fan pressure ratio and fan efficiency, and the characteristic parameters include the total pressure and total temperature at the fan outlet: ； ； In the formula, , are the total pressure and total temperature at the fan outlet after correction, , are the total pressure and total temperature at the fan inlet.

6. The method for recording the characteristics of a high-pressure compressor under the simulated whole-machine working environment according to claim 5, characterized in that, The recorded reference state is consistent with the matching state of the whole machine, and the consistent matching state means that the state points of the fan and the high-pressure compressor are both on the common working line.

7. The method for recording the characteristics of a high-pressure compressor under the simulated overall machine working environment according to claim 6, wherein In the process of obtaining the high-pressure compressor characteristic curve by conducting the high-pressure compressor characteristic acquisition in the reference state, first, adjust the internal flow throttle device to change the flow area of the internal exhaust device to conduct the acquisition of the high-pressure compressor characteristic curve. The number of state points for the acquisition of the high-pressure compressor characteristic curve is not less than 7 points, including at least the block point, the operating point, the highest efficiency point, and the surge point. After each state point on the characteristic curve is stabilized, the state point is collected. During the process of acquiring the characteristic curve, when the deviation of the relative corrected speed of the high-pressure compressor from the reference state is greater than the predetermined value, the fan state point is adjusted to stabilize the relative corrected speed of the high-pressure compressor.

8. The method for recording the characteristics of a high-pressure compressor under an analog whole-machine working environment according to claim 7, characterized in that, It also includes: Conduct an experiment on the influence of adjustable variables on the matching characteristics in the reference state, and conduct the acquisition of state points or characteristic curves under the condition of adjusting a single adjustable variable.

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