基于SA湍流模型的DES方法应用  

Application of detached-eddy simulation based on Spalart-Allmaras turbulence model

作　　者：陈江涛[1] 张培红[1] 周乃春[1] 邓有奇[1] 

机构地区：[1]中国空气动力研究与发展中心,绵阳621000

出　　处：《北京航空航天大学学报》2012年第7期905-909,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家重点基础研究发展计划资助项目(2009CB724100)

摘　　要：使用基于SA(Spalart-Allmaras)湍流模型的分离涡模拟(DES,Detached-Eddy Simulation)方法,对圆柱绕流和超声速圆柱底部流动等高雷诺数大分离流动进行了数值模拟.无粘通量的计算采用二阶迎风格式,时间推进使用二阶隐式双时间步法.计算表明相对于雷诺平均N-S方程(RANS,Reynolds-Averaged Navier-Stokes)模拟,时空均为二阶精度的DES模拟能够分辨更为精细的分离区三维旋涡结构,对分离区主要湍流结构的捕捉和平均压力分布的预测取得了满意的结果.The numerical simulation of the high Reynolds number,massively separated flows such as flow over the circular cylinder and supersonic base flow were performed with detached-eddy simulation based on Spalart-Allmaras turbulence model.The inviscid flux was obtained with 2nd order upwind scheme and 2nd order implicit dual time method was used for accurate time marching.Detached eddy simulation presented more resolved three dimensional turbulent vortex structures compared with corresponding RANS（Reynolds-averaged Navier-Stokes） method.The resolution of main turbulent structures in wake region and prediction of mean pressure distribution show agreement with experiments.

关 键 词：圆柱绕流 底部流动 分离涡模拟 分离流动 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]