本文对多级离心压缩机用的大流量三元叶轮的轮毂比大,相对宽度大,进口马赫数高,又要求轴向尺寸小的气动特点。论述了给定载荷的叶片设计方法和最佳叶片载荷分布型状;在无粘准三元设计计算中如何采用熵梯度使叶轮进口和出口流场计算与实际粘性流动相符合等问题。 In this paper, the multi-stage centrifugal compressor with a large flow rate three-wheel impeller hub ratio, relative width, high Mach number, but also requires small axial size pneumatic features. Discusses the blade design method and the optimal blade load distribution shape for a given load. How to calculate the flow field at the inlet and outlet of the impeller with the actual viscous flow in entropy gradient-free ternary design and calculation?