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

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.

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