压气机周期性动态畸变的理论研究

THEORETICAL RESEARCH ON THE RESPONSE OF AN AXIAL COMPRESSOR TO INLET PERIODIC DYNAMIC DISTORTION

本文建立了周期性动态畸变下压气机内的流场模型 ,提出并分析了流动模型的频响问题。并对一实际的两级低压压气机进口总压周期性动态畸变在多种频率下进行了数值模拟。计算与实验表明 :两者不论是总压幅度还是相位均符合较好。根据理论计算结果 ,分析了动态畸变沿压气机的传播特点 。

A flow model of flow field is formulated for axial compressors under periodic dynamic distortion.The frequency response of the flow field model is analysed.A computer program for problems of various types of periodic dynamic distortion has been written according to the flow field model and the numerical method.The flow fields of a two stage L.P.compressor under inlet total pressure periodic dynamic distortion were simulated.The results of computation and experiments are shown in good agreement either in the amplitude or in phase of total pressure fluctuation.The characteristics of propagation of dynamic distortion through the compressor are analysed,sensitivity of compressor to some frequency is found according to the results of computation.