| LES／RANS混合方法对超声速底部流动的应用 |
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| 引用本文： | 高瑞泽,阎超.LES／RANS混合方法对超声速底部流动的应用[J].北京航空航天大学学报,2011,37(9):1095-1099. |
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| 作者姓名： | 高瑞泽 阎超 |
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| 作者单位： | 北京航空航天大学航空科学与工程学院,北京,100191;北京航空航天大学航空科学与工程学院,北京,100191 |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2009CB724104) |
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| 摘 要： | 为克服大涡模拟(LES,Large Eddy Simulation)对近壁区域使用的局限,近年来LES/RANS(Reynolds Averaged Navier-Stokes)混合方法成为研究热点,利用LES与RANS两者自身的优点克服对方的不足,有效实现计算精度和效率的统一.基于LES/RANS混和方法,采用Smagorinsky-BL(Baldwin-Lomax)模型和新型Vreman-BL模型,对超音速底部流动这一难题进行了模拟,分析了其流场结构.计算结果表明:得到的速度型、底面压力分布与实验值吻合,优于雷诺平均方法的结果.
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| 关 键 词： | 湍流 大涡模拟 近壁流动 混合方法 |
| 收稿时间： | 2010-05-06 |
LES/RANS hybrid method for supersonic axisymmetric base flow |
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| Gao Ruize Yan Chao.LES/RANS hybrid method for supersonic axisymmetric base flow[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(9):1095-1099. |
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| Authors: | Gao Ruize Yan Chao |
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| Institution: | School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | To overcome the limitation of large eddy simulation(LES) for wall problem,LES/RANS hybrid method was investigated in recent years,which not only combined the advantages of LES and RANS but also avoided the disadvantages of each other.Base flow is a difficult problem in CFD.Based on LES/RANS hybrid method,Smagorinsky-BL model and a new Vreman-BL model were applied to an axisymmetric base flow at supersonic conditions.The obtained base flow structure was analyzed in comparison with experimental data.The resul... |
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| Keywords: | turbulence large eddy simulation wall flow hybrid |
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