0 引言离心式压缩机广泛应用于国民经济的各个部门,其性能的优劣对节约能源,加速国民经济发展起着重要的作用.为设计出效率高、工况范围宽的离心式压缩机,科学工作者对其内部流动进行着大量的研究.离心式压缩机内部流动是一个逆压过程,叶轮的高速旋转和叶道复杂的几何形状都使其内部流动变得十分复杂.流体在向前运动的同时还存在着横向潜流,这就是对 0 Introduction Centrifugal compressors are widely used in various sectors of the national economy, the merits of its performance on energy conservation, accelerating the development of the national economy plays an important role.In order to design a high efficiency, wide range of centrifugal compressors, Scientists have done a great deal of research on their internal flow.Compressor internal flow is a counter-pressure process, the high-speed rotation of the impeller and the complex geometry of the leaf makes its internal flow becomes very complicated.Fluid in the forward There is also a horizontal undercurrents of movement, which is right