103 トリッピングロッドによる円柱の流体力の抑制

概要

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Investigations on characteristics of flow and fluid forces acting on a circular cylinder with two tripping rods were carried out in a uniform flow at a Reynolds number of 5.5×(10)^4. The diameter of the tripping rod was chosen 0.08∿0.12 times of the cylinder. To obtain an optimum location of tripping rod for suppressing fluid forces, the position of the tripping rods were varied from 20°∿60° and fluid forces acting on the cylinder were measured systematically. From the result, it was found that the optimum location of the tripping rods were 30°∿40° based on the consideration of suppression of time-averaged and fluctuating fluid forces. In addition, the effect of tripping rods on flow structures and fluid forces are discussed in details based on surface pressure distributions, Strouhal numbers, surface oil- flow pattern, power spectrum distribution and flow visualization.
一般社団法人日本機械学会の論文
2002-10-05