低速轴流压气机顶部微量喷气控制失速机理的数值模拟  

NUMERICAL SIMULATION OF MICRO INJECTION IN A LOW-SPEED AXIAL COMPRESSOR

作　　者：徐纲[1] 聂超群[1] 黄伟光[1] 陈静宜[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080

出　　处：《工程热物理学报》2004年第1期37-40,共4页Journal of Engineering Thermophysics

基　　金：中国科学院知识创新项目(No.KGCX2-301)

摘　　要：对低速轴流压气机的转子顶部进行微量喷气已经证明可以有效的抑制旋转失速,但通过实验研究其机理比较困难。本文对该低速轴流压气机的转子顶部进行微量喷气的失速起始过程进行了数值模拟,通过非定常流场和失速起始过程同未加喷气的情况进行比较,分析了微量喷气控制失速起始的机理。计算得到的特性线和失速点流量同实验较好吻合。Micro injection has the effect of suppressing rotating stall in axial compressor in the previous experiments. But the mechanism of stall suppression of micro injection and its unsteady response is still unknown and difficult to explore by experiment. The numerical simulation has been investigated to clarify the detailed flow structure at near and post stall conditions. The calculated performance line showed good agreement in stall margin improvement by the injected air of the same as experiments. The high local momentum of the injected flow scrubbed the velocity field near suction surface of blade and therefore suppressing the separation. The forward shifted location of the tip vortices can also be observed.

关 键 词：压气机 旋转失速 主动控制 微量喷气 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]