静叶摆动辅助轴流压气机退出旋转失速过程的数值模拟

Numerical Simulation of Exiting Stalling Process of Stationary Blade Auxiliary Axial Compressor

采用数值模拟的方法,对轴流压气机进入旋转失速、退出旋转失速过程以及加入叶片摆动耦合使压气机退出旋转失速的过程进行了三维数值模拟。对比了加入与未加入叶片摆动对压气机退出旋转失速状态过程中的流量影响。数值计算表明,在加入合适的叶片摆动耦合后,可以使得压气机退出旋转失速状态的流量减小1.6%,压比上升1.7%。结合两种退出方式的旋转失速过程对比,得到该压气机失速团破碎的条件:部分叶片通道全叶高消除显著的流动分离,出现具有一定"稳定裕度"的优质流动,导致失速团传播途径受阻,使失速团迅速破碎、消失。

A three-dimensional numerical simulation of a one and half-stage axial-flow compressor was carried out through numerical simulations on the process of the compressor entering the rotational stall,exiting the rotational stall process,and the blade swing coupling compressor exiting the rotational stall process.This paper compares the effects of the added and non-added blade swing on the flow of the compressor during the dynamic process of exiting the stall state.Numerical calculations show that the flow rate of the compressor exiting the spinning stall state can reduce by 1.6%,and that the pressure ratio can increase by 1.7%with the proper blade swing modes being added.By combination of the two ways to exit the spinning stall process,the conditions for the crushing of the stall stall of the compressor are obtained with part of the blade channel full leaf height eliminating significant flow separation and a high-quality flow with a certain"stability margin"occuring,thus making the stall mass transmission obstructed and the stall group break and disappear quickly.