CAJ | 학술논문

发动机试验时，通常采用在进气道出口和发动机进口之间加装测量耙的方式，来测量截面的总静压参数，进而获得发动机进口空气流量。考虑到附面层影响，采用新型附面层压力组合测量耙进行测量。同时，对获取截面流场压力的不同测量方案进行了分析，并结合试验数据，分析了不同测量方案产生的误差。结果表明：采用压力组合测量耙能较为准确地获得发动机进口空气流量，并且采用压差传感器获取截面流场压力，能显著减小发动机进口空气流量和附面层的测量误差。
발동궤시험시，통상채용재진기도출구화발동궤진구지간가장측량파적방식，래측량절면적총정압삼수，진이획득발동궤진구공기류량。고필도부면층영향，채용신형부면층압력조합측량파진행측량。동시，대획취절면류장압력적불동측량방안진행료분석，병결합시험수거，분석료불동측량방안산생적오차。결과표명：채용압력조합측량파능교위준학지획득발동궤진구공기류량，병차채용압차전감기획취절면류장압력，능현저감소발동궤진구공기류량화부면층적측량오차。
When testing aero-engine, the general way to get the total static pressure of cross section and air-flow rate in the entry of engine is putting a measurement rake between intake outlet and the entry of engine. Based on the consideration of the boundary layer impact, a new type of boundary layer pressure combination rake was employed to measure the airflow. Meanwhile not only the methods of measuring flow field pressure of the cross section from different ways were researched, but also the measurement errors by different mea-suring method were analyzed in combination with test data. The results show that more accurate airflow rate value can be obtained by using this combination measuring rake and the differential pressure sensors could significantly reduce the airflow of engine entry and the measuring errors of the boundary layer.