| Citation: | NIU Wenjing, LU Yuen, XUE Wenpeng, et al. Optimization of aero-engine pneumatic pressure test method in flight test by using pressure scanner[J]. Journal of Aerospace Power, 2025, 40（9）：20240336 doi: 10.13224/j.cnki.jasp.20240336
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In the aero-engine flight test, due to the large number of testing parameters of the test engine, the number of installed sensors was large, which contradicted with the limited airborne space. In addition, water droplets easily flowed into the pressure measuring pipe and freezed during the flight, resulting in the failure of airflow pressure measurement. Focusing on the above issues, the method of using a pressure scanner instead of traditional pressure sensors to measure engine airflow parameters was proposed, and a method of reverse blowing and heating the pressure measuring pipe was presented. The adaptive design of pressure scanner system on an airplane, high pressure gas reverse blowing and heating and control design, and verification of the above design by flight test were carried out. The results showed that the method of using the pressure scanner for air flow pressure measurement and scanning valve reverse blowing and heating can effectively solve the contradiction between the limited space of the aircraft and large number of installed sensors, avoid the problem of invalid measurement due to the water accumulation or icing in the pressure ducts, and ensure effective measurement of test engine pressure parameters. This method has good application value in flight test of aircraft.
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