高亚声速下附面层抽吸控制压气机叶栅流动分离的研究

In order to study the effects and mechanism of the suction parameters on the flow separation control at high subsonic velocity, the high-load compressor cascade is taken as the research object, the effects of suction layout and suction rate on the control effect of flow separation inside the cascade are studied by numerical simulation. The results show that the suction of the boundary layer can significantly improve the internal flow of the cascade, and reduce the flow loss caused by the separation of the boundary layer and the separation of the endwall corners and mutal mixing. The best location for the suction of the boundary layer at high subsonic velocity is near the fully developed area of the boundary layer rather than the starting point of separation. With the 1.32% suction rate, the boundary layer suction of the blade from the trail edge of 34% chord length of the suction surface can achieve the best effect, and the total loss of the cascade is reduced by 54.03%. The combined suction has no obvious effect for further improving flow separation due to the reduction of suction intensity of each suction slot. There is a positive correlation between the suction rate and the suction effect, but the boundary layer suction at high subsonic velocity cannot completely eliminate the corner separation of the high load cascade.