剛体壁面に付着するガス気泡とキャビテーション気泡の相互干渉

抄録

An experimental study was conducted focusing on the interaction between gas bubbles adhering to the surface of the rigid boundary and cavitation bubbles produced near the gas bubbles. In a sufficiently large water tank, gas bubbles of arbitrary size were placed on the surface of the boundary, discharge cavitation bubbles were produced, and the subsequent behaviors of the gas and cavitation bubbles were photographed with a high-speed camera using a halogen lamp as a light source. In this study, the interaction of bubbles was discussed, while focusing on the variation in the cavitation bubble centroid with time. The main parameters are the bubble size ratio and relative distance between the bubbles and rigid boundary, and the migration characteristics of the cavitation bubble were classified into three types based on the direction of centroid movement.