提高k-ω SST模型对翼型失速特性的模拟能力  

Improving the capability of k-ωSST turbulence model for predicting stall characteristics of airfoil

作　　者：文晓庆[1] 柳阳威[1] 方乐[1] 陆利蓬[1] 

机构地区：[1]北京航空航天大学航空发动机气动热力重点实验室,北京100191

出　　处：《北京航空航天大学学报》2013年第8期1127-1132,共6页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(51006006;51136003);国家重点基础研究发展计划资助项目(2012CB720205);航空科学基金资助项目(2012ZB51014)

摘　　要：采用CFD软件fluent,k-ωSST模型对S825翼型进行了二维数值模拟.针对k-ωSST模型对翼型分离失速特性模拟不准的情况,对分离区域内湍流的强非平衡输运特性进行了分析.研究表明:原始模型由于不能准确模拟分离区内湍流的强非平衡输运特性,导致其对翼型失速特性模拟失效;提出了通过修正模型系数a1及β*∞,提高k-ωSST模型预测非平衡湍流输运特性的方法,从而提高对翼型失速特性的模拟精度.Two-dimensional numerical simulations of NREL airfoil S825 with k-toSST turbulence model were conducted. For the k-ω SST turbulence model could not predict the airfoil aerodynamic performance accurately at stall conditions, the non-equilibrium turbulence transport nature was systematically analyzed. It was found that ： the mis-predicting of the stall characteristics was due to the fact that the tradition turbulence model could not accurately predict the strongly non-equilibrium turbulence transport nature. Correcting the constant α1 or β∞＊ could improves obviously the capability of prediction stall characteristics of k-ω SST turbulence model,because by giving a more reasonable turbulence transport nature, the capability of k-ω SST model in capturing the non-equilibrium turbulence was improved notably.

关 键 词：S825翼型 k-ωSST模型 失速特性 湍流输运特性 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]