基于内流数值试验的离心叶轮设计改进和流动性能分析

Redesign of a Centrifugal Impeller Based on Numerical Experiment of Internal Flow Field and Performance Analysis

依据对离心叶轮内三维流场的数值研究，对某离心叶轮进行了改进设计．对于改进前后的叶轮内流动性能，运用有限元素法进行通流的三维气动计算和分析对比．计算结果表明，改进设计叶轮较原设计叶轮的流动性能有较大提高．

ased on numerical experiment of three-dimensional internal flow field, a centrifugalimpeller is redesigned. The flow performances of pre-and-after redesign are analysed withfinite element method. The calculating results indicate that the behaviour of the redesignedimpeller is better than that of the old impeller.