Flow around a finite circular cylinder on a flat plate
Flow around a finite circular cylinder on a flat plate
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DOI：
10.1299/jsme1958.27.2142
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发表时间：
1984-10
期刊：
影响因子：
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通讯作者：
T. Kawamura;M. Hiwada;Toshiharu Hibino;I. Mabuchi;M. Kumada
中科院分区：
文献类型：
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作者：
T. Kawamura;M. Hiwada;Toshiharu Hibino;I. Mabuchi;M. Kumada
为了研究三维流动的影响，在平板上进行了有限圆柱周围的流动可视化实验和表面压力、斯特劳哈尔数等的测量。筒体长细度参数在l/d=1 ~ 8范围内，长细度参数对流动特性影响显著。通过对近尾流平均运动和周期运动的分析，得到了以下结果：(1)侧壁处的分离速度低于二维圆柱体的分离速度，这降低了阻力系数。(2)自由端正下方存在一对尾涡。(3)下洗流和自由端附近的尾涡主导了卡门涡的脱落行为。最后，在此基础上建立了有限高圆柱的流动模型。
Some flow visualization experiments and measurements of surface pressure, Strouhal number, etc. around a finite circular cylinder on a flat plate have been performed in order to study the effect of a three-dimensional flow. The slenderness parameter of the cylinder is in a range of l/d=1∼8, where the slenderness parameter influences remarkably the flow behavior. From an analysis of mean and periodical motion in the near-wake flow, the following results are obtained. (1) The separation velocity at the side wall is lower than that of a two-dimensional cylinder, and this decreases the drag coefficients. (2) A pair of trailing vortices exist right below the free-end. (3) Down-wash flow and the trailing vortex near the free-end dominate the behavior of Karman vortex shedding. Finally, based on these results, the flow models around the finite height cylinder are presented.