激光诱导空泡冲击强化动力学特性  

Dynamic Characteristics of Laser Induced Cavitation Shocking

作　　者：陈铁牛[1] 邓宇[2] 曾文平 李松 丁首斌 陈海涛 Chen Tieniu;Deng Yu;Zeng Wenping;Li Song;Ding Shoubin;Chen Haitao(Gangdong Polytechnic,Foshan,Guangdong 528041,China;Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东职业技术学院,广东佛山528041 [2]广东工业大学,广州510006

出　　处：《机电工程技术》2023年第10期108-114,共7页Mechanical & Electrical Engineering Technology

基　　金：2021年度广东省普通高校特色创新类项目(2021KTSCX209)。

摘　　要：为研究激光诱导空泡冲击强化的动力学特性,将激光聚焦于微孔上方和孔内形成空泡,通过不同激光焦点位置、不同激光能量和不同激光频率进行空泡实验,利用高速摄影仪拍摄,观测微孔入口和出口处空泡的脉动特征,对比分析激光空泡的尺寸、速度、压力等变化曲线。研究发现,孔口上方和孔内的激光空泡能将孔内液体迅速推出孔尾,在孔口下方形成环形空泡,激光焦点距离微孔越近、激光能量越大,孔口下方的环形空泡越大,产生的速度和水锤压力也越大。To study the dynamic characteristics of laser induced cavitation shocking,the laser is focused above and inside the micropores to induce cavitation.The cavitation experiment is conducted with different laser focus position,laser energy,and laser frequency.High speed photography is used to observe the pulsation characteristics of the cavitation at the inlet and outlet of the micropores,and the size,velocity,pressure,and other change curves of the laser cavitation are compared and analyzed.The experimental results show that the laser cavitation above and inside the hole can quickly push the liquid out of the micropores,forming an annular cavitation below the hole.The closer the laser focus is to the micropore,or the greater the laser energy,the larger the annular cavitation below the hole will be,resulting in higher velocity and water hammer pressure.

关 键 词：激光空泡 冲击强化 冲击波 微加工 

分 类 号：TH162.1[机械工程—机械制造及自动化]