关键词: 喷气发动机进气道;流场畸变;二维流;性能分析

Abstract: The effeets of the throat area ratio and divergent angle on the performance of the two-dimensional type turbulence generator are given. The statistiasl random properties of the fluctuation pressures at the exit are compared with those of the distorted flow field of a real inlet. The throat regulation law presented in the paper can be used to conduct the experiments in the laboratory. The convergent-divergent passage formed with two inclined planes is studied more fully. In the mean time,the three inclined planes passage is also tested to show its capability for the production of high turbulance. The results show that the tubulance level of 5% can be obtained for the two-inclined-planes and 10% for the three-inclined planes with Mach number of about 0.5 at the exit.

Key words: Jet engine inlet;Flow distortion;Two-dimensional flow;Performan-ce analysis