軸対称物体のキャビテーションを伴うすきま流れ振動

概要

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This paper presents experimental studies of vibrations of an axisymmetric body in a cavitating leakage flow. The experimental passage is a narrow annular parallel passage. The effect on the characteristics of vibrations and the flow pattern in the passage were evaluated by changing the width of the passage, the downstream pressure and so forth. From the experimental results, the following conclusions were obtained. When the narrow passage becomes choked and the cavitation bubbles are concentrated around the wake, the divergent passage is formed by the columniform bubbles, and self-excited vibrations due to the negative damping occur in the system. Under such conditions, the self-excited vibrations occur significantly when the cavitation number is about 0.2.
一般社団法人日本機械学会の論文
1991-12-25