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Compressor test flow measurement and analysis method, device and compressor test system

A technology of flow measurement and analysis method, which is applied in the field of compressor test and can solve problems such as the inability to accurately obtain the actual flow of the compressor.

Active Publication Date: 2021-03-12
AECC SHANGHAI COMML AIRCRAFT ENGINE MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the flow fluctuates greatly, the actual flow of the compressor cannot be accurately obtained by the test test

Method used

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  • Compressor test flow measurement and analysis method, device and compressor test system
  • Compressor test flow measurement and analysis method, device and compressor test system
  • Compressor test flow measurement and analysis method, device and compressor test system

Examples

Experimental program
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Effect test

Embodiment 1

[0120]Embodiment 1: Take a certain compressor test (denoted as test A) as an example to analyze the measured flow fluctuation. The compressor test flow data acquisition frequency f is 20Hz, that is, 20 time values ​​and 20 measured flow values ​​are collected per second.

[0121] Step 1, for each moment , to calculate the moment Downfit steady flow . select the moment Calculate the measured flow values ​​at 200 moments before and after (including the measured flow values ​​at 100 moments at 5 seconds before this moment, and at 100 moments at 5 seconds after this moment), and calculate the 200 moments The following corresponds to 200 flow measured values the average value of Fitted steady flow at time :

[0122]

[0123] In the second step, for each moment , to calculate the moment Absolute Fluctuation of Flow :

[0124]

[0125] In the third step, for each moment , to calculate the moment The relative fluctuation of the flow rate under :

[0...

Embodiment 2

[0132] Embodiment 2: In this embodiment, the results of two compressor tests (respectively recorded as test A and test B) are compared and analyzed.

[0133] Taking a certain compressor test (denoted as test B) as an example, comparing the measured flow results of the compressor test A in Example 1, the difference in the measured flow fluctuation range in the two compressor tests can be analyzed, and the performance data of the two tests can be assisted. comparison work. Fitting steady flow in experiment B , Absolute Fluctuation of Flow , the relative fluctuation of flow For the calculation, refer to the calculation process of Test A in Example 1.

[0134] Relative Fluctuation of Flow over time Comparative analysis of change charts. Figure 5 , Figure 6 Respectively, test A and test B flow relative fluctuations over time changes. Such as Figure 5 , the compressor test A has large fluctuations in the flow rate above 60% speed, and the test accuracy is poor, ...

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Abstract

The present disclosure relates to a compressor test flow measurement and analysis method, device and compressor test system, wherein the analysis method includes: collecting the measured flow value of the compressor test at a preset frequency f; for the measured flow value corresponding to each moment, Calculate the fitting stable flow at this moment; calculate the absolute fluctuation of the flow at each moment; calculate the relative fluctuation of the flow at each moment; analyze the results according to the calculation results of the absolute fluctuation of the flow and the relative fluctuation of the flow The fluctuation of the measured flow rate is described.

Description

technical field [0001] The present disclosure relates to the technical field of compressor testing, in particular to a flow measurement and analysis method and device for compressor testing, and a compressor testing system. Background technique [0002] During the development of aero-engine compressors, it is necessary to conduct compressor tests to measure various parameters such as compressor flow, pressure ratio, and efficiency. Among them, the measurement of compressor flow rate is an extremely important task. Accurate test measurement of the flow rate of the compressor is extremely important for evaluating the overall characteristics of the compressor, so the measurement accuracy of the flow rate of the compressor is required to be very high during the test. However, in the actual test process, due to various reasons, there will always be insufficient measurement accuracy of the compressor flow rate. Among them, a common phenomenon is that the measured flow rate of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/14G01M99/00F04D27/00
CPCF04D27/001G01M15/14G01M99/005
Inventor 姜逸轩曹传军吴帆翟志龙王进春
Owner AECC SHANGHAI COMML AIRCRAFT ENGINE MFG CO LTD