摘要
在这份报纸，我们在旋涡流的控制上做了数字研究并且由依附薄 splitter 盘子拖柱体的减小。有依附的 splitter 盘子的方形的剖面图的柱体的 wake 结构为雷纳兹数字的一个范围被分析，基于事件溪流和柱体的高度，在 laminar 范围。管理流动的海军司烧方程被控制体积方法在蹒跚的格子安排上解决。我们为连接压力的方程使用了半含蓄的方法(简单) 为计算的算法。我们的结果证明柱体在上游的一个 splitter 盘子的存在减少 drag，但是它在当板长度在 1.5 次以后是柱体的高度时，流频率的旋涡上有小影响。一个下游的 splitter 盘子的存在阻抑流频率的旋涡。进内部方面的液体的乘火车分开砍层被下游的 splitter 板妨碍。我们的结果建议由依附柱体在上游、下游的同轴的 splitter 盘子，流的旋涡能被压制，以及减小在拖被获得。我们做了参量的研究决定这些 splitter 盘子的最佳的长度以便完成低拖并且低旋涡流频率。
In this paper we have made a numerical study on the control of vortex shedding and drag reduction of a cylinder by attaching thin splitter plates. The wake structure of the cylinder of square cross-section with attached splitter plates is analyzed for a range of Reynolds number, based on the incident stream and height of the cylinder, in the laminar range. The Navier-Stokes equations governing the flow are solved by the control volume method over a staggered grid arrangement. We have used the semi-implicit method for pressure-linked equation （SIMPLE） algorithm for computation. Our results show that the presence of a splitter plate upstream of the cylinder reduces the drag, but it has a small impact on the vortex shedding frequency when the plate length is beyond 1.5 time the height of the cylinder. The presence of a downstream splitter plate dampens the vortex shedding frequency. The entrainment of fluid into the inner side of the separated shear layers is obstructed by the downstream splitter plate. Our results suggest that by attaching in-line splitter plates both upstream and downstream of the cylinder, the vortex shedding can be suppressed, as well as a reduction in drag be obtained. We made a parametric study to determine the optimal length of these splitter plates so as to achieve low drag and low vortex shedding frequency.
