材料期刊网

Krain关于高速离心式压缩机叶轮内部流场的LDA实验测量不仅对认识这种特定的复杂流动有重要意义，而且亦为验证正在迅速发展的CFD软件提供了比较依据。但是作者发现，Krain公开发表的实验叶轮的几何型线缺少叶轮出口附近区域的型线坐标，直接用其进行数值计算分析将引起误差。为此，本文根据Krain在不同文献中所提供的有关实验叶轮的资料，重新构造补全了实验叶轮出口区域的型线坐标。然后，利用一多功能CFD软件对该实验叶轮进行了计算分析，较详细、深入地探讨了叶轮流道内二次流旋涡结构的形成和发展过程。

The krain's LDA measurements of flow field inside the high-speed centrifugal compressor impeller are not only great significant for the understanding of this kind of complex flow mechanism, but also are vital to the validation of the fast developing CFD codes.The measured data has been widely used by many authors to verify their calculations. However, it was found that the geometry of the experimental impeller published in open literature is not covered the whole blade, and could bring considerable errors for the numerical analysis if it is taken as the actual geometry for the mesh generation.The complete geometry therefore has to be reconstructed by making use of various relative reports of the impeller published in different reference. The numerical analysis is then carried out with a multi-purpose CFD code using the newly reconstructed complete geometry, and the formation and development of the secondary flow vortex motion is discussed in detail.