| 绕方柱流脉动压力场的大涡模拟 |
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| 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, 0(1): 8-11 |
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| 作者姓名： | 童兵 祝兵 周本宽 |
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| 作者单位： | 西南交通大学,工程科学研究院,四川,成都,610031 |
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| 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。
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| 关 键 词： | 大涡模拟 绕方柱流 压力场 Smagorinsky模型 |
| 文章编号： | 1009-640X(2002)01-0008-04 |
Large eddy simulation of pulsating pressure field for flow around a square cylinder |
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| TONG Bing,ZHU Bing,Zhou Ben kuan. Large eddy simulation of pulsating pressure field for flow around a square cylinder[J]. Hydro-Science and Engineering, 2002, 0(1): 8-11 |
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| Authors: | TONG Bing ZHU Bing Zhou Ben kuan |
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| 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. |
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| Keywords: | large eddy simulation flow around a square cylinder pressure field Smagorinsky model |
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