| 提高k-ωSST模型对翼型失速特性的模拟能力 |
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| 引用本文： | 文晓庆,柳阳威,方乐,陆利蓬.提高k-ωSST模型对翼型失速特性的模拟能力[J].北京航空航天大学学报,2013,39(8):1127-1132. |
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| 作者姓名： | 文晓庆 柳阳威 方乐 陆利蓬 |
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| 作者单位： | 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;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;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;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 |
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| 基金项目： | 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) |
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| 摘 要： | 采用CFD软件fluent,k-ω SST模型对S825翼型进行了二维数值模拟.针对k-ω SST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-ω SST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.
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| 关 键 词： | S825翼型 k-ω SST模型 失速特性 湍流输运特性 |
| 收稿时间： | 2012-09-04 |
Improving the capability of k-ωSST turbulence model for predicting stall characteristics of airfoil |
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| Wen Xiaoqing;Liu Yangwei;Fang Le;Lu Lipeng.Improving the capability of k-ωSST turbulence model for predicting stall characteristics of airfoil[J].Journal of Beijing University of Aeronautics and Astronautics,2013,39(8):1127-1132. |
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| Authors: | Wen Xiaoqing;Liu Yangwei;Fang Le;Lu Lipeng |
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| Institution: | National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Two-dimensional numerical simulations of NREL airfoil S825 with k-ωSST turbulence model were conducted. For the k-ωSST 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 a1 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. |
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