固壁旁激光空泡生长和溃灭特性的实验研究  

Experimental study of the growth and collapse of cavitation bubbles near a rigid boundary

作　　者：贺杰[1] 刘秀梅[2] 陆建[2] 倪晓武[2] 

机构地区：[1]南京工程学院基础部,江苏南京211167 [2]南京理工大学应用物理系,江苏南京210094

出　　处：《光电子．激光》2009年第9期1267-1270,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60578015);教育部高校优秀青年教师奖励计划和博士点基金资助项目(20050288025);南京理工大学博士创新基金资助项目

摘　　要：采用2套基于光偏转原理的光纤传感器(OBD),测量了激光空泡脉动全过程及空泡溃灭对靶材造成的破坏。通过实验获得了激光空泡在靶表面2次膨胀收缩的全过程,判定了空泡在2次脉动中对应的最大、最小泡半径和溃灭周期,并推算了空泡泡壁速度随时间的变化关系。实验发现,在脉冲激光作用下,水中靶材依次受到激光烧蚀压力和射流冲击力作用,且射流冲击力是造成靶材破坏的主要原因。The growth and collapse of a cavitation bubble near a rigid boundary in water are investigated by two sensitive fiber-optic sensors based on optical beam deflection.The characteristic waveforms induced by a cavity during the two oscillating cycles are presented and the corresponding maximum and minimum radii and oscillation time are determined.The velocity of the bubble wall is also deduced.Furthermore,the experimental results show that underwater targets are impacted in turn by laser-generated ablation for...

关 键 词：光纤传感器(OBD) 空泡 射流冲击力 空蚀 

分 类 号：TN24[电子电信—物理电子学]