水中激光击穿空泡的高速摄影研究

Experiment Investigation of Characters of Bubble Impulsion by Optical Breakdown

为了分析激光击穿液体介质过程中的等离子腔体、空泡脉动、近/远场声波特性等综合效应,将高速摄影技术应用于水下激光击穿研究.观察到了激光击穿形成的等离子体闪光、空泡脉动及溃灭过程,通过对所得照片的分析,得到了激光空泡生长的规律,实验结果与已有的水下空泡理论计算及采用光散射、压力传感器测量结果吻合较好,证明了高速摄影技术在水下激光击穿产生空泡特性研究中的重要作用.

To study the microcosmic effect, such as pl optical breakdown was applied in water with Nd： YAG laser-induced cavitation bubble expansion and collapse asma flash, bubble oscillation and acoustic wave, laser pulses. The experimental investigation of the was photographed with high-Speed photography. The characteristic of laser induced bubble was analyzed based on the bubble images. And good agreement was observed between the results of the calculations and the experimental data.