液体中光击穿所激发声场的理论研究

Sound Fields Generated by Laser-induced Liquid Breakdown

以液体中光击穿所激发声场为研究对象,在等离子体椭球模型的基础上,为方便理论计算,简化等离子体椭球模型,提出了等离子体椭圆盘模型,对光击穿所激发声场进行了理论研究.得到了等离子体椭圆盘辐射声场的声压规律,并利用椭圆坐标变换,依据马修函数特性和模态的正交性,求得了等离子体椭圆盘振动位移的解析表达式.

The sound field excited by laser-induced liquid breakdown is studied using fundamental theories of acoustics. Based on plasma ellipsoid model, a plasma elliptical disk model is proposed to simplify the processing and theoretical calculations. Via putting forward the plasma elliptical dish model, the law of sound pressure and a plasma elliptical dish vibration analytical expression of displacement are obtained, which provide certain theoretical basis to optical breakdown in liquid.