流路壁面近傍でのはく離渦キャビテーション気泡の分裂・崩壊過程 : 円柱まわりの流れ〔流体工学, 流体機械〕

概要

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Much attention has been focused on vortex cavitation bubbles because of their highly erosive power. In this study, vortex cavitation flow developing in the wake behind a circular cylinder with a typical separated vortex is experimentally examined to solve the process on collapse and impulse of cavitation bubble in the context of the cavitation erosion. From the comparison with the erosion pit distribution obtained in erosion tests due to vortex cavitation, it is experimentally proved that the collapsing process is classified into four patterns, using high-speed-video observations of vortex cavitation bubbles. As a result it is shown that the collapsing process has two different sequential stages so that a vortex cavity of large spatial scale does not collapse all at once.
社団法人日本機械学会の論文
1998-06-25