Numerical study of corner separation in a linear compressor cascade using various turbulence models  

作　　者：Liu Yangwei Yan Hao Liu Yingjie Lu Lipeng Li Qiushi 

机构地区：[1]Collaborative Innovation Center of Advanced Aero-Engine,Beihang University,Beijing 100083,China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics,School of Energy and Power Engineering,Beihang University

出　　处：《Chinese Journal of Aeronautics》2016年第3期639-652,共14页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51376001,No.51420105008,No.51306013,No.51136003);the National Basic Research Program of China(2012CB720205,2014CB046405);the Beijing Higher Education Young Elite Teacher Project;the Fundamental Research Funds for the Central Universities;supported by the Innovation Foundation of BUAA for Ph.D.Graduates

摘　　要：Three-dimensional corner separation is a common phenomenon that significantly affects compressor performance. Turbulence model is still a weakness for RANS method on predicting corner separation flow accurately. In the present study, numerical study of corner separation in a linear highly loaded prescribed velocity distribution （PVD） compressor cascade has been investigated using seven frequently used turbulence models. The seven turbulence models include Spalart Allmaras model, standard k-e model, realizable k-e model, standard k-to model, shear stress transport k co model, v2-fmodel and Reynolds stress model. The results of these turbulence models have been compared and analyzed in detail with available experimental data. It is found the standard k-1： model, realizable k-e model, v2-f model and Reynolds stress model can provide reasonable results for predicting three dimensional corner separation in the compressor cascade. The Spalart-Allmaras model, standard k-to model and shear stress transport k-w model overesti- mate corner separation region at incidence of 0°. The turbulence characteristics are discussed and turbulence anisotropy is observed to be stronger in the corner separating region.Three-dimensional corner separation is a common phenomenon that significantly affects compressor performance. Turbulence model is still a weakness for RANS method on predicting corner separation flow accurately. In the present study, numerical study of corner separation in a linear highly loaded prescribed velocity distribution （PVD） compressor cascade has been investigated using seven frequently used turbulence models. The seven turbulence models include Spalart Allmaras model, standard k-e model, realizable k-e model, standard k-to model, shear stress transport k co model, v2-fmodel and Reynolds stress model. The results of these turbulence models have been compared and analyzed in detail with available experimental data. It is found the standard k-1： model, realizable k-e model, v2-f model and Reynolds stress model can provide reasonable results for predicting three dimensional corner separation in the compressor cascade. The Spalart-Allmaras model, standard k-to model and shear stress transport k-w model overesti- mate corner separation region at incidence of 0°. The turbulence characteristics are discussed and turbulence anisotropy is observed to be stronger in the corner separating region.

关 键 词：Compressor cascade Corner separation Turbomachinery CFD Turbulence anisotropy Turbulence models 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程]