目前，多级叶轮机械的三维流动计算绝大多数采用了绝对与相对定常模型来模拟静动叶轮。对于这样的计算，周向平均是一种很有效的级间混合方法。不同的作者往往采用不同的平均方法，本文对于这些方祛作出了详细的理论与数值分析比较。 At present, most of the three-dimensional flow calculation of multi-stage impeller adopts absolute and relative steady model to simulate the static impeller. For such a calculation, the circumferential averaging is a very efficient method of interstage mixing. Different authors tend to adopt different averaging methods. This article makes a detailed theoretical and numerical analysis of these methods.