S-A模型在分离流动模拟中的改进

推进技术 ›› 2008, Vol. 29 ›› Issue (5): 539-544.

S-A模型在分离流动模拟中的改进

王丹华,马威,陆利蓬

北京航空航天大学航空发动机气动热力重点实验室;北京航空航天大学航空发动机气动热力重点实验室;北京航空航天大学航空发动机气动热力重点实验室

发布日期:2021-08-15

Modification of S-A turbulence model on separation flows

National Key Laboratory of Aircraft Engine,Beijing Univ.of Aeronautics and Astronautics,Beijing 100083,China;National Key Laboratory of Aircraft Engine,Beijing Univ.of Aeronautics and Astronautics,Beijing 100083,China;National Key Laboratory of Aircraft Engine,Beijing Univ.of Aeronautics and Astronautics,Beijing 100083,China

Published:2021-08-15

摘要/Abstract

摘要： 基于湍流不平衡性的分析,通过修正雷诺应力以及模型系数的计算,提高了S-A模型在二维边界层以及三维叶栅的分离流动上的预估能力。修正后的S-A模型给出了与实验吻合较好的结果,在对于分离流动的预估能力上优于原始模型。

关键词: 湍流模型;分离;边界层;角区;各向异性

Abstract: Based on the analysis of the nonequilibrium of turbulence,by the modification of Reynolds stresses and model coefficient,S-A turbulence model was improved on the ability to predict separation flows of 2-D boundary layer and 3-D cascade.The results by modified S-A turbulence model are consistent with experiment,indicating better simulation for separation flows superior to the original model.

Key words: Turbulence model;Separation;Boundary layer;Corner region;Anisotropic

王丹华,马威,陆利蓬. S-A模型在分离流动模拟中的改进[J]. 推进技术, 2008, 29(5): 539-544.