引用本文:童兵,祝兵,周本宽.绕方柱流脉动压力场的大涡模拟[J].水利水运工程学报,2002,(1):8-11
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绕方柱流脉动压力场的大涡模拟
童兵,祝兵,周本宽
西南交通大学,工程科学研究院,四川,成都,610031
摘要:
采用有限差分法,对雷诺数为22000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、升力系数和Strouhal数均与试验结果较为吻合。
关键词:  大涡模拟 绕方柱流 压力场 Smagorinsky模型
DOI:
分类号:TV131.33
基金项目:
Large eddy simulation of pulsating pressure field for flow around a square cylinder
TONG Bing,ZHU Bing,Zhou Ben kuan
Abstract:
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.
Key words:  large eddy simulation,flow around a square cylinder,pressure field,Smagorinsky model
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