【摘要】 单泡声致发光现象时间和空间的高重复性,为实验研究气泡动力学特性提供了可能。文章利用Dave倒推算法,计算气泡Mie散射光强随散射角和气泡半径的变化,并选择了散射角80°为实验测量位置。利用R P方程理论计算的R(t)曲线与Mie散射实测结果相拟合,定量研究了气泡平衡半径、压缩比及崩溃阶段气泡的能量转换,结果表明,随激励声压的增大,气泡所吸收的声能可能绝大部分转换成激波及热能,使泡内温度上升。更多还原

【Abstract】 The phenomenon of single bubble sonoluminescence (SBSL) occurs accurately and repeatedly both in time and space. This makes possible to carry out experimental studies of the dynamic characteristics of bubble motion. The Dave downward recurrence algorithm is used to calculate the Mie scattering intensity, which varies with the scattering angle and the bubble radius. An 80′ scattering angle is used in the Mie scattering measurements. The radius versus time curve, i.e., the R(t) curve, calculated from the Rayleigh-Plesset dynamic equation is fitted with the Mie scattering measurement results in order to study the parameter quantitatively, including ambient radius and expansion radio of the bubble, and energy transformation in the rapid collapse process. It is seen that the acoustical energy captured by the bubble mainly converts to imploding shock waves and heat that raises the temperature in the bubble.更多还原