一、引言 高性能离心式压气机包含高的效率和宽广的运行范围两方面的要求。后弯叶轮(这里指具有三元形状的半开式后掠出口叶轮)由于它的可控载荷设计,在效率和运行范围两方面都优于径向出口叶轮(以下简称径向叶轮)。随着材料强度问题的解决,后弯叶轮在动力应用方面有逐步取代径向叶轮的趋势。工程热物理研究所基于吴仲华教授的两类流面理论,发展了一套设计高性能离心式压气机级的方法;开展了压气机元件的试验研 I. Introduction High performance centrifugal compressors contain both high efficiency and wide operating range requirements. Backward impellers, in this case semi-open swept exit impellers with a ternary shape, outperform radial exit impellers (hereinafter referred to as radial impellers) in both efficiency and operating range due to its controllable load design. With the solution of the problem of material strength, the backward impeller has the tendency to replace the radial impeller in the power application step by step. Based on two kinds of flow theory of Professor Wu Zhonghua, the Institute of Engineering Thermophysics developed a set of methods for designing high-performance centrifugal compressor stages and carried out experimental research on compressor components