キャビテーション過程における気泡発生の抑制と流れ場の遷移 : 拘束比の大きな円柱流れ

概要

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The cavitation process with a double peak in cavitation-events curve is examined in detail using circular cylinders of a large confinement ratio. Double-peak-type cavitation process means that cavitation bubbles redevelop to create the second peak of cavitation events after the first peak where cavitation bubbles occur and then become weak and/or disappear. At the time when the first peak transits to the second peak, the base pressure coefficient of a circular cylinder rises to a large extent and the alternate occurrence of vortex cavitation bubbles from both directions of the shoulders on a circular cylinder breaks down and is suppressed. Finally, it is made clear in the present investigation that the occurrence of cavitation bubbles can cause the transition of flow regime, especially the critical flow regime from subcritical flow towards supercritical flow.
一般社団法人日本機械学会の論文
1993-03-25