Fuel flow test data quality on-line detection method and device

Abstract

The invention belongs to the technical field of engine bench tests, and relates to a fuel flow test data quality online detection method and device. The method comprises the steps that S1, first fuel oil flow is obtained based on characteristics of a fuel oil nozzle part, second fuel oil flow is obtained based on a main pump metering valve of a control system, and third fuel oil flow is obtained based on a test system; s2, calculating a first ratio of the first fuel oil flow to the third fuel oil flow, and calculating a second ratio of the second fuel oil flow to the third fuel oil flow; s3, calculating a first correction coefficient in a preset first correction function according to the current high-voltage conversion rotating speed, and calculating a second correction coefficient in a preset second correction function according to the current high-voltage conversion rotating speed; and S4, when the difference value between the first specific value and the first correction coefficient exceeds a set value, or the difference value between the second specific value and the second correction coefficient exceeds the set value, it is determined that the third fuel flow has the test data quality problem. The test efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of engine bench testing, and in particular relates to a method and device for online detection of fuel flow test data quality. Background Art

[0002] When conducting bench tests on aircraft engines, fuel flow is an important test item, and the accuracy of its test system directly affects the evaluation of engine performance.

[0003] Currently, when the engine is tested on a bench, a turbine flow meter is usually used to measure the fuel flow, which is remotely transmitted to a data acquisition system via a signal cable.

[0004] The main measurement principle of turbine flowmeter is that the power of flowing liquid drives the turbine blades to rotate, and its rotation speed is approximately proportional to the volume flow rate. The fluid volume indication through the flowmeter is based on the turbine impeller speed. It consists of a sensor and a signal converter, and the signal output mainly includes pulse frequency, analog quantity or digital communication mode.

[0005] This test method has the following fault possibilities:

[0006] (1) The test has a data acquisition system numerical display failure due to a disconnection or poor contact of the data processing, power supply or signal circuit of the data acquisition system.

[0007] (2) The turbine flowmeter signal is disturbed due to fuel line vibration and other reasons.

[0008] (3) The actual flow rate of the engine exceeds the flow meter range, the internal components of the flow meter fail, etc., resulting in measurement errors, etc.

[0009] The above fault will cause the fuel flow test data of the engine test to be invalid. Usually, the turbine flowmeter is not calibrated for each test, but is calibrated periodically, so the accuracy of the turbine flow test system cannot be ensured for each test or at every moment during the entire test.

[0010] If the test needs to evaluate the engine performance indicators, the quality of the fuel flow test data directly affects the evaluation of important technical parameters such as fuel consumption rate, which will cause losses in the manpower, economic costs and efficiency of the entire test. Summary of the invention

[0011] In order to solve the above problems, the present application provides a method and device for online detection of fuel flow test data quality. Without increasing the workload of engine testing, by utilizing the existing component characteristics, mutual supervision of common parameters is carried out to timely discover abnormalities in test data.

[0012] The first aspect of the present application provides a method for online detection of fuel flow test data quality, mainly comprising:

[0013] Step S1, obtaining a first fuel flow rate based on the characteristics of the fuel nozzle component, obtaining a second fuel flow rate based on the metering valve of the main pump of the control system, and obtaining a third fuel flow rate based on the bench test system;

[0014] Step S2, calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate;

[0015] Step S3, calculating a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculating a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds;

[0016] Step S4: When the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value, it is determined that there is a test data quality problem in the third fuel flow obtained based on the bench test system.

[0017] Preferably, in step S1, obtaining the first fuel flow rate based on the fuel nozzle component characteristics includes:

[0018] Step S11, determining the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity;

[0019] Step S12, determining a first fuel flow rate according to a flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and the fuel flow rate of the nozzle.

[0020] Preferably, in step S1, obtaining the second fuel flow rate based on the metering valve of the main pump of the control system includes:

[0021] Step S13, obtaining a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system;

[0022] Step S14, obtaining a second fuel flow rate according to the displacement calculation of the metering valve of the main pump of the control system.

[0023] Preferably, in step S3, the plurality of different high-pressure converted speeds N2R include:

[0024] N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

[0025] Preferably, in step S3, when measuring the first fuel flow rate, the second fuel flow rate or the third fuel flow rate at each high-pressure converted speed, an average value of a plurality of data within a set time period is taken as the final fuel flow rate.

[0026] The second aspect of the present application provides an online detection device for fuel flow test data quality, mainly comprising:

[0027] A fuel flow acquisition module, used to obtain a first fuel flow based on the characteristics of the fuel nozzle component, obtain a second fuel flow based on the metering valve of the main pump of the control system, and obtain a third fuel flow based on the bench test system;

[0028] a ratio calculation module, used for calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate;

[0029] A correction coefficient acquisition module, used to calculate a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculate a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds;

[0030] The comparison module is used to determine that there is a test data quality problem in the third fuel flow obtained based on the bench test system when the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value.

[0031] Preferably, the fuel flow acquisition module includes a first fuel flow acquisition unit, which is used to obtain a first fuel flow based on the fuel nozzle component characteristics, and the first fuel flow acquisition unit includes:

[0032] A pressure difference calculation subunit, used to determine the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity;

[0033] The first fuel flow calculation subunit is used to determine the first fuel flow according to the flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and fuel flow of the nozzle.

[0034] Preferably, the fuel flow acquisition module includes a second fuel flow acquisition unit, which is used to obtain a second fuel flow based on a metering valve of a main pump of the control system, and the second fuel flow acquisition unit includes:

[0035] A relationship curve acquisition subunit, used to acquire a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system;

[0036] The second fuel flow calculation subunit is used to calculate and obtain the second fuel flow according to the displacement of the metering valve of the main pump of the control system.

[0037] Preferably, in the correction coefficient acquisition module, the plurality of different high-pressure converted speeds N2R include:

[0038] N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

[0039] Preferably, in the correction coefficient acquisition module, when measuring the first fuel flow rate, the second fuel flow rate or the third fuel flow rate at each high-pressure converted speed, the average value of multiple data within a set time period is used as the final fuel flow rate.

[0040] This application ensures the accuracy and effectiveness of important test parameters, saves the data interpretation and analysis cycle after the test, and improves the test efficiency; at the same time, effective test data can save the number of engine debugging starts and the driving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a flow chart of a preferred embodiment of the online detection method for fuel flow test data quality of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0043] The first aspect of the present application provides a method for online detection of fuel flow test data quality, such as Figure 1 As shown, it mainly includes:

[0044] Step S1, obtaining a first fuel flow rate based on the characteristics of the fuel nozzle component, obtaining a second fuel flow rate based on the metering valve of the main pump of the control system, and obtaining a third fuel flow rate based on the bench test system;

[0045] Step S2, calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate;

[0046] Step S3, calculating a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculating a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds;

[0047] Step S4: When the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value, it is determined that there is a test data quality problem in the third fuel flow obtained based on the bench test system.

[0048] In step S1, the present application adds two new ways to the existing fuel flow obtained by the bench test system, namely, obtaining the first fuel flow based on the characteristics of the fuel nozzle components and obtaining the second fuel flow based on the metering valve of the control system main pump. The fuel flow obtained by these two ways is used to determine whether the existing fuel flow obtained by the bench test system, namely, the third fuel flow, is accurate. In step S2, the fuel flow of these two new ways is compared with the third fuel flow to obtain a ratio. In step S4, if this ratio exceeds the limit, it is considered that the third fuel flow obtained by the bench test system is inaccurate. Whether it exceeds the limit is determined by obtaining a correction coefficient in step S3, and then comparing the ratio obtained in step S2 with this correction coefficient to determine whether it exceeds the limit.

[0049] In some optional implementations, in step S1, obtaining the first fuel flow rate based on the fuel nozzle component characteristics includes:

[0050] Step S11, determining the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity;

[0051] Step S12, determining a first fuel flow rate according to a flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and the fuel flow rate of the nozzle.

[0052] This embodiment provides a specific way of obtaining the first fuel flow rate through the first approach, that is, obtaining the first fuel flow rate by calculation through the flow characteristic curve of the fuel nozzle.

[0053] In some optional implementations, in step S1, obtaining the second fuel flow rate based on the metering valve of the main pump of the control system includes:

[0054] Step S13, obtaining a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system;

[0055] Step S14, obtaining a second fuel flow rate according to the displacement calculation of the metering valve of the main pump of the control system.

[0056] This embodiment provides a specific way of obtaining the second fuel flow rate through the second approach, namely, calculating through the flow characteristic curve of the metering valve of the main pump of the control system.

[0057] The third fuel flow rate is obtained by a conventional bench test system. During the engine bench test, a turbine flowmeter is usually used to measure the fuel flow rate to obtain the volume flow rate Q. The mass flow rate of the bench test is: Wf3 = Q*ρ, where ρ is the fuel density.

[0058] At the same speed, the engine fuel flow rates obtained by the above three methods are Wf1, Wf2, and Wf3 respectively. Then, Wf1 and Wf3 are compared in real time to obtain a first ratio Kpz=Wf1 / Wf3; while Wf2 and Wf3 are compared at the same time to obtain a second ratio Kzb=Wf2 / Wf3.

[0059] The fuel flow obtained by the above three methods will have deviations due to factors such as the test system, measurement point layout, and ambient temperature. The deviation cannot be eliminated, and correction coefficients need to be added to the three flow values. That is, the fuel flow obtained by the above three methods cannot indicate which one is accurate and which one is inaccurate. Therefore, in step S3, the present application uses the theoretically equal relationship between the three flow values ​​when the engine is running at a stable speed to obtain a standard ratio, i.e., the first correction coefficient and the second correction coefficient, through experiments.

[0060] In some optional implementations, in step S3, the plurality of different high-pressure converted speeds N2R include:

[0061] N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

[0062] This embodiment selects typical steady-state speed points, and it is recommended to select slow, N2R = 80%, N2R = 85%, N2R = 90%, N2R = 95%, and the maximum steady-state speed point; the above speed point selection can be specified according to the vibration characteristics of the specific model. Then, the fuel flow rate of the bench test engine is used as the reference benchmark data to obtain the nozzle flow correction coefficient under different high-pressure conversion speeds:

[0063] For example, the first fuel flow rate Wf1 is compared with the third fuel flow rate Wf3 to obtain a ratio Kpz (in the following parameters, the following table represents the high pressure conversion speed point, for example, MC represents slow speed, and 80 represents N2R=80%), which specifically includes:

[0064] Slow car status: Kpz MC =Wf1 MC / Wf3 MC ; N2R = 80% state: Kpz 80 =Wf1 80 / Wf3 80 …….

[0065] Based on this, the first correction function Kpz0=f(N2R) can be fitted, and based on this, the first correction coefficient can be calculated at any high-pressure conversion speed N2R.

[0066] Similarly, the second fuel flow rate Wf2 is compared with the third fuel flow rate Wf3 to obtain a ratio Kzb, specifically including: Slow state: Kzb MC =Wf2 MC / Wf3 MC ; N2R = 80% state: Kzb 80 =Wf2 80 / Wf3 80 …….

[0067] Based on this, the second correction function Kzb0=f(N2R) can be fitted, and based on this, the second correction coefficient can be calculated at any high-pressure conversion speed N2R.

[0068] In some optional embodiments, in step S3, when measuring the first fuel flow rate, the second fuel flow rate or the third fuel flow rate at each high-pressure converted speed, the average value of multiple data within a set time period is used as the final fuel flow rate.

[0069] In this example, for operations involving real-time fuel flow value acquisition, it is recommended to take the average value within 30 seconds to eliminate the interference caused by test data fluctuations.

[0070] Finally, in step S4, the ratio obtained in step S2 and the correction coefficient obtained in step S3 are determined. Specifically, when |Kpz-Kpz0|>m or when |Kzb-Kzb0|>m, the test value of the bench fuel flow is abnormal, and its validity needs to be confirmed by other means. The m here needs to take into account the fluctuation of the test value, which is generally consistent with the fuel flow test accuracy requirement.

[0071] The present application realizes online detection of the quality of engine fuel flow test data by real-time comparison of the fuel flow value obtained by component characteristics and the test bench turbine flow measurement data.

[0072] The second aspect of the present application provides an online detection device for fuel flow test data quality corresponding to the above method, mainly comprising:

[0073] A fuel flow acquisition module, used to obtain a first fuel flow based on the characteristics of the fuel nozzle component, obtain a second fuel flow based on the metering valve of the main pump of the control system, and obtain a third fuel flow based on the bench test system;

[0074] a ratio calculation module, used for calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate;

[0075] A correction coefficient acquisition module, used to calculate a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculate a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds;

[0076] The comparison module is used to determine that there is a test data quality problem in the third fuel flow obtained based on the bench test system when the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value.

[0077] In some optional embodiments, the fuel flow acquisition module includes a first fuel flow acquisition unit, which is used to obtain a first fuel flow based on the characteristics of the fuel nozzle component, and the first fuel flow acquisition unit includes:

[0078] A pressure difference calculation subunit, used to determine the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity;

[0079] The first fuel flow calculation subunit is used to determine the first fuel flow according to the flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and fuel flow of the nozzle.

[0080] In some optional embodiments, the fuel flow acquisition module includes a second fuel flow acquisition unit, which is used to obtain a second fuel flow based on a metering valve of a main pump of the control system, and the second fuel flow acquisition unit includes:

[0081] A relationship curve acquisition subunit, used to acquire a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system;

[0082] The second fuel flow calculation subunit is used to calculate and obtain the second fuel flow according to the displacement of the metering valve of the main pump of the control system.

[0083] In some optional implementations, in the correction coefficient acquisition module, a plurality of different high-pressure converted speeds N2R include:

[0084] N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

[0085] In some optional embodiments, in the correction coefficient acquisition module, when measuring the first fuel flow, the second fuel flow or the third fuel flow at each high-pressure converted speed, the average value of multiple data within a set time period is used as the final fuel flow.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for online detection of fuel flow test data quality, characterized in that: include: Step S1, obtaining a first fuel flow rate based on the characteristics of the fuel nozzle component, obtaining a second fuel flow rate based on the metering valve of the main pump of the control system, and obtaining a third fuel flow rate based on the bench test system; Step S2, calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate; Step S3, calculating a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculating a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds; Step S4: When the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value, it is determined that there is a test data quality problem in the third fuel flow obtained based on the bench test system.

2. The method for online detection of fuel flow test data quality according to claim 1, characterized in that: In step S1, obtaining a first fuel flow rate based on the fuel nozzle component characteristics includes: Step S11, determining the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity; Step S12, determining a first fuel flow rate according to a flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and the fuel flow rate of the nozzle.

3. The method for online detection of fuel flow test data quality according to claim 1, characterized in that: In step S1, obtaining the second fuel flow rate based on the metering valve of the main pump of the control system includes: Step S13, obtaining a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system; Step S14, obtaining a second fuel flow rate according to the displacement calculation of the metering valve of the main pump of the control system.

4. The method for online detection of fuel flow test data quality according to claim 1, characterized in that: In step S3, the multiple different high-pressure converted speeds N2R include: N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

5. The method for online detection of fuel flow test data quality as claimed in claim 4, characterized in that: In step S3, when measuring the first fuel flow rate, the second fuel flow rate or the third fuel flow rate at each high-pressure converted speed, an average value of a plurality of data within a set time period is taken as a final fuel flow rate.

6. A fuel flow test data quality online detection device, characterized in that: include: A fuel flow acquisition module, used to obtain a first fuel flow based on the characteristics of the fuel nozzle component, obtain a second fuel flow based on the metering valve of the control system main pump, and obtain a third fuel flow based on the bench test system; a ratio calculation module, used for calculating a first ratio of the first fuel flow rate to the third fuel flow rate, and calculating a second ratio of the second fuel flow rate to the third fuel flow rate; A correction coefficient acquisition module, used to calculate a first correction coefficient in a preset first correction function according to the current high-pressure conversion speed, and calculate a second correction coefficient in a preset second correction function according to the current high-pressure conversion speed, wherein the first correction function refers to a function fitted by a ratio of a first fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds, and the second correction function refers to a function fitted by a ratio of a second fuel flow rate to a third fuel flow rate at a plurality of different high-pressure conversion speeds; The comparison module is used to determine that there is a test data quality problem in the third fuel flow obtained based on the bench test system when the difference between the first ratio and the first correction coefficient exceeds a set value, or when the difference between the second ratio and the second correction coefficient exceeds a set value.

7. The fuel flow test data quality online detection device according to claim 6, characterized in that: The fuel flow acquisition module includes a first fuel flow acquisition unit, which is used to obtain a first fuel flow based on the characteristics of the fuel nozzle component, and the first fuel flow acquisition unit includes: A pressure difference calculation subunit, used to determine the pressure difference ΔPf of the fuel nozzle according to the fuel supply pressure Pf of the combustion chamber and the total pressure P3 in the combustion chamber cavity; The first fuel flow calculation subunit is used to determine the first fuel flow according to the flow characteristic curve of the fuel nozzle, wherein the flow characteristic curve is a curve obtained by testing the fuel nozzle in a component tester and is used to characterize the pressure difference ΔPf and fuel flow of the nozzle.

8. The fuel flow test data quality online detection device according to claim 6, characterized in that: The fuel flow acquisition module includes a second fuel flow acquisition unit, which is used to obtain a second fuel flow based on a metering valve of a main pump of the control system, and the second fuel flow acquisition unit includes: A relationship curve acquisition subunit, used to acquire a relationship curve between valve displacement and fuel flow characteristics obtained through a test of a metering valve component of a main pump of a control system; The second fuel flow calculation subunit is used to calculate and obtain the second fuel flow according to the displacement of the metering valve of the main pump of the control system.

9. The fuel flow test data quality online detection device according to claim 6, characterized in that: In the correction coefficient acquisition module, a plurality of different high-pressure converted speeds N2R include: N2R=idle speed, N2R=80%, N2R=85%, N2R=90%, N2R=95%, N2R=maximum steady-state speed.

10. The fuel flow test data quality online detection device according to claim 9, characterized in that: In the correction coefficient acquisition module, when measuring the first fuel flow rate, the second fuel flow rate or the third fuel flow rate at each high pressure converted speed, the average value of multiple data within a set time period is used as the final fuel flow rate.

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