| 用DES数值模拟分离绕流中的旋涡运动 |
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| 引用本文： | 邓枫,伍贻兆,刘学强.用DES数值模拟分离绕流中的旋涡运动[J].计算物理,2008,25(6):683-688. |
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| 作者姓名： | 邓枫 伍贻兆 刘学强 |
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| 作者单位： | 南京航空航天大学航空宇航学院, 江苏 南京 210016 |
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| 摘 要： | 脱体涡模拟(Detached-Eddy Simulation,DES)是近年来出现的一种结合雷诺平均方法和大涡数值模拟两者优点的湍流模拟方法.采用基于Spalart-Allmaras方程模型的DES方法,数值求解Navier-Stokes方程,模拟绕流发生分离后的旋涡运动.其中空间区域离散采用有限体积法,方程空间项和时间项的数值离散分别采用Jameson中心格式和双时间步长推进方法.通过模拟圆柱绕流以及翼型失速绕流,观察到了与物理现象一致的旋涡结构,得到与实验数据相吻合的计算结果.
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| 关 键 词： | 旋涡运动 脱体涡模拟 Navier-Stokes方程 湍流模拟 |
| 收稿时间： | 2007-06-25 |
| 修稿时间： | 2008-02-17 |
Simulation of Vortex in Separated Flows with DES |
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| DENG Feng,WU Yizhao,LIU Xueqiang.Simulation of Vortex in Separated Flows with DES[J].Chinese Journal of Computational Physics,2008,25(6):683-688. |
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| Authors: | DENG Feng WU Yizhao LIU Xueqiang |
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| Institution: | College of Aerospace Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China |
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| Abstract: | Navier-Stokes equations are solved numerically to simulate vortex motion in separated flows using detached-eddy simulation(DES) method in Saplart-Allmaras one equation model.A finite volume scheme is employed.Spatial discretization is performed with Jameson central scheme.Time integration is implemented by a dual time-stepping approach. Vortex structures of flow over a circular cylinder or a stall airfoil simulated agree well with physical analyses and experimental data. |
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| Keywords: | vortex motion detached-eddy simulation NavierStokes equations turbulence modeling |
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