侧柱与串列双柱绕流之间的干扰

The Interference of Flow Around a Side Cylinder and A Couple of Cylinders in Tandem Arrangement

本文给出了关于串列双柱与创柱间流动干扰的实验研究结果。当三个圆柱排成等边三角形并靠得很近时，由于三圆柱间强烈的缝隙流动，大大地改变了绕流其中的串列双圆柱的流态。特别，当三圆柱中心距等于二倍圆柱直径时，在串列双柱的前、后柱之间形成了强烈的偏斜的缝隙流，出现了独特的压力分布以及要比单柱高出三倍以上的旋涡脱落频率。

In this paper,the interference of flow around a side cylinder and a couple of cylinders in tandem arrangement is given by conducting experiments in wind tunnel.When three equispaced cylinders are getting closer, the gap flow among them is getting stronger and the flow pattern is changed greatly.Especially, When the distance between each cylinder is less than two times of the diameter of a single cylinder, a very strong gap flow appears between two cylinders in tandem. The frequency of vortex shedding of the fore cylinder is more than three times as high as that of the single cylinder, and a very peculiar pressure distribution isdisplayed.