对声致发光稳定性及声压极限的探讨

Stability of Sonoluminescence and Acoustic Pressure Limit

单泡声致发光现象中,气泡动力学特性的研究是十分重要的.结合Keller-Miksis方程和气泡稳定性方程,并引入绝热过程,利用龙格库塔法计算了不同驱动声压、不同环境半径下的稳定性曲线,并对驱动声压扰动下的稳定性相图做了讨论,得出引入绝热过程后稳定性区域及驱动声压上限一定程度增加的结论.

The characteristics of bubble dynamics are very important to the phenomenon of single bubble sonoluminescence. With the Keller-Miksis equation and the shape instability equation of the bubbles, we calculated the stability curves under diffident driving acoustic pressure Pa and diffident ambient radius R0 by using the Runge-Kutta method, and discussed the pa-R0 phase diagrams under the driving pressure limit. Furthermore, in the primary collapse duration of the bubbles, we applied the adiabatic process. After the introduction of adiabatic process, the region of stable values and the upper limit of actuation sound pressure certain degree increase to a certain degree.