绕方柱流脉动压力场的大涡模拟  

Large eddy simulation of pulsating pressure field for flow around a square cylinder

作　　者：童兵[1] 祝兵[1] 周本宽[1] 

机构地区：[1]西南交通大学工程科学研究院,四川成都610031

出　　处：《水利水运工程学报》2002年第1期8-11,共4页Hydro-Science and Engineering

摘　　要：采用有限差分法 ,对雷诺数为 2 2 0 0 0的绕方柱流的脉动压力场进行了三维大涡模拟 .采用时间分解算子法 ,将N S方程分为对流分步、扩散分步和传播分步 ,再分别进行计算 .在大涡模拟中 ,用两层模型处理Smagorinsky模型在近壁区模拟结果的发散问题 .计算的压力场以及阻力系数。D large eddy simulation (LES) of the pulsating field for flow around a square cylinder with a Reynolds' number of 22 000 is carried out by use of finite difference method. By using the split operator method, the N S equation is divided into three steps, namely convection, diffusion and propagation steps, to be calculated separately. A two layer model is employed to deal with divergence near the wall of Smagorinsky model. The calculated pressure field, lifting coefficient and Strouhal number accord with the experimental results.

关 键 词：大涡模拟 绕方柱流 压力场 Smagorinsky模型 

分 类 号：TV131.33[水利工程—水力学及河流动力学]