2D非稳态方柱绕流的数值模拟与分析

2-D Unsteady Computational Analysis of Square Cylinders in Cross Flow

用有限体积法对与来流夹角为45°以及夹角为0°的方柱绕流进行了数值模拟分析.从对方柱的绕流的数值模拟结果可以得出倾角为45°的方柱对尾涡的影响较之倾角为0°的方柱要大得多.由此可知,特征长度越大对柱体尾部涡影响越大.同时还对方柱的受力进行了计算和分析,并与现有实验数据、文献资料进行了比较,两者互相吻合.

In this paper finite-volume method is used to simulate and analysis the flow around square cylinder with 45°and 0° coming flow. In the simulation we found that the vortex behind the square cylinder is wider and more violent for a square cylinder at 45°as compared to a square cylinder at 0°,and we can know that the longer the characteristic length,the more effect it made to the vortex. We also calculate different coefficients and compare with the experimental results. The comparisons show a good match with available data from the reference and literature.