3817 フィン付き円柱からの渦放出に及ぼす螺旋状側板の効果(J15-1 流体関連の騒音と振動(1)-円柱と渦-,J15 流体関連の騒音と振動,2005年度年次大会)

概要

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The purpose of this paper is to clarify the effects of helical strakes around a serrated-fin tube on the vortex shedding. The existence of helical strakes of large diameter around a fin tube caused the decrease of the periodicity and the intensity of vortex shedding. The coherent scale of vortex in the spanwise direction was smaller than the case without helical strakes. On the other hand, it was made clear that Karman vortex was clearly formed even in the case of a fin tube with helical strakes of small diameter. The existence of helical strakes of small diameter around a fin tube caused the increase of the periodicity of vortex shedding. The coherent scale of vortex in the spanwise direction was larger than the case without helical strakes.
社団法人日本機械学会の論文
2005-09-18