0905 自由界面下を運動する円柱から放出される渦 : Strouhal数の水深依存性(OS9-1 混相流の多次元可視化計測,オーガナイズドセッション)

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We have conducted laboratory experiments on the flow past a circular cylinder moving beneath an air-water interface. The vortex street and the free surface profile are visualized for Reynolds number between 200 and 15,000 and for Froude number between 0.01 and 3.2. At large Reynolds number (> 10,000), the surface deformation becomes substantial in the downstream of the cylinder and bubble injection is observed. The Strouhal-Reynolds number relationship with gap ratio between 0.25 and 2.0 which shows the period of the vortex shedding becomes long when the gap ratio is small.
一般社団法人日本機械学会の論文
2010-10-29