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利用高功率激光与液体物质相互作用产生双空泡,采用高速照相机、高频测量水听器对激光双空泡的生长过程及辐射的声波信号进行了测量,对不同双空泡间距、不同激光能量产生的以及不同方位的声波分别进行采集,并与单空泡声波进行比较,对其特性进行分析。分析结果表明:双空泡之间距离的减小与作用激光能量的增大,引起空化声波声压逐渐增大;而双空泡声波频率峰值始终保持在1kHz,与实验条件的改变无关;双空泡声波相对于单空泡声波声压增大,频率峰值并没有发生明显的改变。
Double cavitation was generated by the interaction of high power laser and liquid material. The growth process of double cavitation laser and the acoustic signal of radiation were measured by high-speed camera and high-frequency hydrophone. The effects of different double cavitation pitch, different laser Energy and different directions of the sound waves were collected separately and compared with the single-cavity sound waves, its characteristics were analyzed. The results show that the decrease of the distance between the two cavities and the increase of the laser energy cause the sound pressure of the cavitating sound waves to increase gradually. However, the peak of the frequency of the double cavitation remains at 1 kHz, which is independent of the experimental conditions. Double cavitation sound waves relative to single sound pressure acoustic wave increases, the peak frequency did not change significantly.