某型涡扇发动机进气总压畸变的试验研究

Aerodynamic stability analysis of inlet total pressure distortion for turbofan

由可移动插板式畸变发生器产生进气总压畸变流场 ,以综合畸变指数评定流场畸变程度 ,分析了进气总压畸变对某型涡扇发动机气动稳定性的影响。得到了稳态总压场不均匀度与总压紊流度随插板深度及发动机转速的变化关系 ,确定了该型发动机的最大 (或临界 )

A distortion generator with a moveable sliding board was used to generate, the distorted flow field. The inlet total pressure distortion tests were completed on a dual-spool turbojet engine. A multiple distortion index 'W' equal to the sum of circumferential uneven degree and the turbulence of total pressure was employed to measure the inlet flow distortion. The engine was tested at four rotor speeds, 80%, 85%, 90% and 95%. The maximum value of multiple distortion index and the sensibility coefficients of the total pressure distortion of the tested engine were determined.