| 一种改进的类DES湍流模拟方法 |
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| 引用本文： | 汪洪波,孙明波,吴海燕,王振国.一种改进的类DES湍流模拟方法[J].航空动力学报,2011,26(10):2167-2173. |
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| 作者姓名： | 汪洪波 孙明波 吴海燕 王振国 |
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| 作者单位： | 国防科学技术大学航天与材料工程学院,长沙,410073 |
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| 摘 要： | 构造了一种基于一方程S-A（Spalart-Allmaras）模型和一方程Yoshizawa亚格子模型的混合RANS/LES（Reynolds-averaged Navier-Stokes/large eddy simulation）湍流模拟方法.在涡黏假设的基础上,将Yoshizawa亚格子湍动能方程转化为等效的亚格...
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| 关 键 词： | 混合RANS/LES(Reynolds-averaged Navier-Stokes/large eddy simulation) 混合函数 凹腔 超声速 亚格子模型 |
| 收稿时间： | 2010/11/2 0:00:00 |
| 修稿时间： | 2011/2/21 0:00:00 |
Improved DES-like method for simulation of turbulent flows |
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| WANG Hong-bo,SUN Ming-bo,WU Hai-yan and WANG Zhen-guo.Improved DES-like method for simulation of turbulent flows[J].Journal of Aerospace Power,2011,26(10):2167-2173. |
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| Authors: | WANG Hong-bo SUN Ming-bo WU Hai-yan and WANG Zhen-guo |
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| Institution: | College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China;College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | A hybrid RANS/LES (Reynolds-averaged Navier-Stokes/large eddy simulation) approach based on one-equation S-A(Spalart-Allmaras) RANS model and one-equation Yoshizawa SGS(sub-grid scale) model was developed.The turbulent kinetic energy transport equation of the SGS model was transformed to an equivalent eddy viscosity transport equation,and then blended with the S-A model equation to generate a hybrid eddy viscosity transport equation,wherein both the SGS behavior and the grid-depending RANS-LES transition of DES were improved.The hybrid RANS/LES approach was then applied to simulate a supersonic,ramped cavity flow,where LES and DES were also implemented on the same mesh for comparison.It shows that the hybrid RANS/LES acts like LES in the free shear flow far away from the wall and outperforms LES and DES in the attached boundary layer. |
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| Keywords: | hybrid RANS/LES(Reynolds-averaged Navier-Stokes/large eddy simulation) blending function cavity supersonic sub-grid scale model |
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