本文提供了一个径、混流式前向三元叶轮成型设计的计算方法和计算机程序(逆命题).着重讨论了前向三元叶轮成型设计与计算中的若干问题(包括前向叶轮的加载特点、流线导数和曲率及子午弧长的计算、流线插值、初场的给定、松驰因子的选取及子午流道形状的数值设计.最后给出了一个应用本文方法和程序设计出的实例. This paper provides a computational method and computer program (inverse proposition) for the design of the radial and mixed flow front ternary impellers, focusing on several issues in the design and calculation of forward ternary impellers (including the loading characteristics of the impeller , The calculation of streamline derivative and curvature, the length of the meridian arc, the interpolation of the streamline, the setting of the initial field, the selection of the relaxation factor and the numerical design of the shape of the meridian flow channel.Finally, a design method based on the method and program Instance.