数值分析串列双圆柱绕流

Numerical simulation of flow over two tandem cylinders

为研究不可压缩流动中二维的串列双圆柱中不同间距对圆柱间相互作用和尾流特征的影响,选取间距比L/D(L为两圆柱中心间的距离,D为圆柱直径)为2、3、4共3个间距进行了数值分析.计算均在Re=200的非定常条件下进行.计算了圆柱的升阻力系数、尾涡脱落频率等描述绕流问题的主要参量.并与参考文献的数值结果比较,验证了用FLUENT分析的有效性.

Unsteady flow over two circuluar cylinders in tandem is analyzied with the software of FLUENT. A Reynolds number of 200, based on cylinder diameter, is used to ensure that the flow remains laminar. Three different gap ratios are taken to investigate the interation between two cylinders and the wake： characteristics. Such parameters of flow characteristics are investigated as lift and drag coefficient and vortex shedding frequencies.The results are consistent with numerical solution by other researchers which indicate the validity of FLUENT.