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SST-DES在小分离流动数值模拟中的改进

王翔宇 李栋

王翔宇, 李栋. SST-DES在小分离流动数值模拟中的改进[J]. 北京航空航天大学学报, 2014, 40(9): 1245-1249. doi: 10.13700/j.bh.1001-5965.2013.0587
引用本文: 王翔宇, 李栋. SST-DES在小分离流动数值模拟中的改进[J]. 北京航空航天大学学报, 2014, 40(9): 1245-1249. doi: 10.13700/j.bh.1001-5965.2013.0587
Wang Xiangyu, Li Dong. Improved SST-DES in numerical simulation of mild separation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(9): 1245-1249. doi: 10.13700/j.bh.1001-5965.2013.0587(in Chinese)
Citation: Wang Xiangyu, Li Dong. Improved SST-DES in numerical simulation of mild separation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(9): 1245-1249. doi: 10.13700/j.bh.1001-5965.2013.0587(in Chinese)

SST-DES在小分离流动数值模拟中的改进

doi: 10.13700/j.bh.1001-5965.2013.0587
基金项目: 国家自然科学基金资助项目(11072200)
详细信息
    作者简介:

    王翔宇(1989-),男,河北保定人,博士生,xiangyu.wang@139.com.

  • 中图分类号: V211.3

Improved SST-DES in numerical simulation of mild separation

  • 摘要: 在基于剪切应力运输(SST,Shear Stress Transport)分离涡模拟(DES,Detached Eddy Simulation)应对小分离流动的数值模拟中,上游雷诺平均方法(RANS,Reynolds Averaged Navier Stokes)区域内较大的涡黏性通过对流扩散方程传递到下游大涡模拟方法(LES,Large Eddy Simulation)区域,导致自由剪切层解析湍流解迟迟得不到发展,剪切层失稳延后,出现强烈的灰区效应。为此将SST-DES中体现LES求解的类亚格子模式重新构造成标准k方程亚格子模式,防止多变量在RANS和LES交界面处对湍流黏性系数的混合影响,最终得到了一种改进的SST-DES方法。采用该方法对AS239翼型小分离数值模拟并与DES和延迟分离涡模拟(DDES,Delayed Detached Eddy Simulation)结果进行对比,可以看出该方法在壁面边界层保留了SST-DDES特性的同时,在尾迹区大大提高了LES的可解能力,显著降低了灰区的影响。

     

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出版历程
  • 收稿日期:  2013-10-15
  • 刊出日期:  2014-09-20

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