离心压缩机叶轮S_2流面正反命题的研究

Research on the Forward and Inverse Proposition of S_2 Surface of Centrifugal Compressor Impeller

分别对流线曲率法正反两类命题进行了研究。正问题中,利用背掠式带分流叶片离心压缩机叶轮算例,计算出子午面流场,对该叶轮进行了性能分析。在反问题中,根据给定设计点参数,设计出了一背掠式叶轮。鉴于气体涡分布的重要性,讨论了不同类型分布对叶轮性能的影响,得出后加载型分布适合离心压缩机叶轮的结论。

This paper focuses on the forward and inverse proposition of streamline curvature method. In the forward proposition, a back-swept impeller with splitters is employed as a sample, the flow field in meridian surface is calculated, and the performance of this impeller is further analyzed. In the inverse proposition, a back-swept impeller is designed upon the parameters of design point. For the significance of vortex distribution, different types of vortex distribution and corresponding flow fields are presented, and come to the conclusion that the later-loading type gives better performance for centrifugal compressor impeller.