Abstract: Pressure correction algorithm and Reynolds equations with k ε turbulence model for closure were applied in the numerical study of internal turbulent flow and the generation of “jet wake” structure at outlet of a centrifugal impeller Comparisons between numerical and experimental results show that the main reason for the generation and formation of “jet wake”structure is the transport of fluids with low energy by the secondary flow

Key words: Centrifugal compressor;Impeller;Turbulent flow;Jet wake structure +;Numerical simulation

摘要： 使用压力修正算法及kε湍流模式求解Reynolds时均的NS方程,数值分析了离心式压气机叶轮内部湍流流动及叶轮出口“射流尾迹”结构的形成过程,计算与实验结果的比较表明,二次流对低能流体的输运是形成射流尾迹结构的主要原因。

关键词: 离心式压气机;叶轮;湍流;射流尾迹+;数值模拟