离心压缩机级内三维粘性流动数值分析

本文介绍了用时间推进法进行离心压缩机级内全三维粘性流场的计算方法．该方法是作者在已完成的求解孤立叶排Ｎ－Ｓ方程的计算程序的基础上发展的，通过使用周向非均匀的叶排间隙混合平面概念来考虑离心叶轮与扩压器之间的相互影响，并依据质量守恒原则，对下游的进口气流角进行了修正，以保证了上下游叶排在相容的流动特性下工作．完成了离心压缩机级（包括叶轮与扩压器）三维粘性定常流场的计算及性能预测．应用本文所发展的程序，对某高炉鼓风机的叶轮及其叶片扩压器进行了计算．

NUMERICAL SIMULATION OF 3-D VISCOUS FLOW FIELD IN A CENTRIFUGAL COMPRESSOR STAGE

A steady solution method for a three-dimensional viscous centrifugal compressor stage flow is developed in this paper. A mixing plane using circumferential average modeling has been developed to evaluate the interaction between the centrifugal impeller and the vane diffuser, and this allows nonuniform flow properties kept at the mixing planes to consider the different blockage of impellers and diffusers. The inlet flow angle of the diffuser is corrected to maintain the impeller and diffuser running at the same mass flow rate. An example of an industrial centrifugal compressor is used to verify the developed method.