剛体壁面近傍における気泡崩壊の二方向同時高速度撮影と衝撃圧力計測

抄録

Simultaneous high-speed observations in two-directions and pressure measurements using a Fiber Optic Probe Hydrophone (FOPH) are conducted to investigate the collapse of a laser-induced bubble near a rigid wall and the corresponding impulsive pressure distribution. It is shown that the measured pressure distributions next to the wall and the observations of top and side views reveal a strong correlation with the pitting damage due to the bubble collapse by Philipp and Lauterborn (1998). The results also show that asymmetric bubble collapse is observed at the second collapse.

The asymmetric toroidal bubble collapse causes the asymmetric pitting damage distribution.