摘要
为检测液体中发生剧烈空化时的临界声压的大小,提出了一种基于声光偏转效应对临界剧烈空化声压进行检测的方法。根据远场光斑分布的时间变化规律确定剧烈空化的发生,通过光线最大偏转距离与焦点峰值声压的关系,可非介入地检测临界剧烈空化声压值,重复性高。通过分析液体中气泡分布及变化规律,以及空化阈值声压随外界环境压强的变化规律对测量结果进行标定,证实了该方法检测临界剧烈空化声压的可行性。
To measure the critical pressure when intense cavitation occurred in liquid, a method to detect the critical intense cavitation pressure which based on the acousto-optical refraction effect is proposed. According to the distribution of the far-field spot which changes with time to determine the occurrence of intense cavitation, it can detect the value of the critical intense cavitation pressure non-invasively by the relation between the maximum deflection distance of the ray and the change of the focus acoustic pressure with a high repeatability. By analysing the distribution of the cavitation bubbles in liquid , and the cavitation threshold pressure changing with the external environmental pressure to calibrate the results, it＇s proved that the feasibility of this way to detect the critical intense cavitation pressure.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第4期160-165,共6页
Chinese Journal of Lasers
基金
国家重大仪器专项(81127901)资助课题
关键词
几何光学
临界剧烈空化声压
声光偏转效应
聚焦超声
geometric optics
the critical intense cavitation pressure
acousto-optic refraction
focused ultrasound
