动态压力畸变下压缩系统稳定性分析

PREDICTION FOR AERODYNAMIC STABILITY IN MULTISTAGE AXIAL COMPRESSION SYSTEMS WITH INLET DYNAMIC PRESSURE DISTORTION

关键词:  轴流式压缩机  进气道畸变  动态响应  数值分析  气动稳定性

Key words:  Axial flow compressor  Inlet distortion  Dynamic response  Numerical analysis  Aerodynamic stability

摘要:

基于逐级压缩系统模型，发展了一种动态压力畸变下压缩系统失稳识别的数值预测方法。应用方法对一多级轴流压缩系统进行了数值分析。给出了动态压力脉动频率与压缩系统失稳首发级及不稳定发生时间之间的定量关联关系。

Abstract:

stage-by-stage compression system model for predicting aerodyamic stability in multistage axial compressors with inlet dynamic pressure distortion is given in this paper. Based on dynamic static pressure variations, a method of recognition of predicting aerodynamic stability is developed. Numerical results of a three-stage experimental axial compressor are given by using thismethod. The critical positions of inlet total pressure fluctuations are determined. The quantitive relationships between inlet total pressure fluctuations and the surge time are obtained. The initial stage inwhich the flow in-stabilities first occurring is indicated.