论文部分内容阅读
基于激光空泡内物质以水蒸气为主的特征,选择特定的Rayleigh-Plesset方程形式,确定激光空泡的动态泡壁位置,并考虑水中气体与激光空泡之间的质量扩散、水蒸气的凝结与蒸发、水的压缩性及热传导、声辐射、黏性、表面张力等因素.建立激光空泡的产生、照相和声压测量系统.通过数值计算与实验结果相结合的办法,使泡内压力的计算值与实验值之间相对误差控制在10%以内,揭示吸收的激光脉冲能量与激光空泡的半径、泡内压力和温度之间的对应关系,以及吸收的激光脉冲能量不变时半径、压力和温度的变化规律.旨在为激光空泡的相关研究提供一定的参考.
Based on the characteristic of water vapor in the laser cavity, a specific Rayleigh-Plesset equation was selected to determine the position of the dynamic bubble wall in laser cavity and the diffusion of mass between water vapor and laser cavity was considered. Coagulation and evaporation, water compressibility and heat conduction, sound radiation, viscosity, surface tension and other factors to establish the laser cavity generation, photography and sound pressure measurement system.By combining the numerical calculation and experimental results, The relative error between the calculated value of the pressure and the experimental value is controlled within 10% to reveal the correspondence between the absorbed laser pulse energy and the radius of the laser cavity bubble, the pressure inside the cavity and the temperature, and the absorbed laser pulse energy is not changed Radius, pressure and temperature variation of the laser cavity to provide some reference for the related research.