离心叶轮出口三维流场研究

RESEARCH ON 3-D DISCHARGE FLOW IN A CENTRIFUGAL IMPELLER

文发展了一种通过求解不可压缩、定常、时均 N- S方程、连续性方程和 k- ε湍流模型方程分析离心叶轮出口三维流场的方法。该方法的差分计算网格通过代数变换关系生成 ,可方便地应用于离心叶轮设计分析。为检验本文分析方法的有效性 ,对一个三元闭式离心压缩机叶轮出口流场进行了实验测量。计算与实验比较表明 。

A method for calculating 3 D discharge flow in a centrifugal impeller is developed by means of solving the incompressible steady time averaged N S equations,the continuity equation and the k ε turbulence model equation.This method is accomplished with calculation grids generated by an algebraic transformation,and thus it can be easily applied to the design analysis of centrifugal impellers.The discharge flow of a three dimensional shrouded centrifugal compressor impeller was measured for assessing the validity of the present calculation procedure.The comparison between the experimental data and the calculation results shows that the present method can predict the mean velocities.