中文摘要：

考察声场参数及液体物理参数等对双频超声空化泡动力学过程的影响,应用Rayleigh-Plesset方程建立双频超声空化泡动力学模型,并利用MATLAB软件进行数值求解。结果表明：在其他条件相同的情况下,双频超声比单频超声的R_（max）/R_0的相应比值要大,空化效果明显增强。当双频超声相位差为0（即双频超声的组合为sin-sin）时,空化泡生长最大。空化泡R_（max）/R_0的比值随着初始半径的增大而减小,空化的剧烈程度变弱;随着超声波总声强的增大,空化的剧烈程度变强;随着流体压力或者液体粘滞系数的增大,空化的剧烈程度变弱。在取得同等空化效果下,双频超声可降低总声强,对初始半径较大的泡核及流体压力和粘度相对较大时,依然能产生瞬态空化效果。

英文摘要：

The effects of some sound field parameters, physical parameters of fluid and other factors for dual frequency ultrasound cavitation dynamics are studied. The cavitation bubble dynamic model of dual frequency ultrasound is established by using the Rayleigh-Plesset equation and solved by using the MATLAB software. The results show that the dual frequency ultrasound could, under the same condition, increase the ratio of the maximum radius to the initial radius of cavitation bubble by comparison with single frequency ultrasound and the amplitude become the biggest when the phase difference is zero（that is, sin-sin wave combination）. The ratio of the maximum radius to the initial radius of cavitation bubble decreases along with the increasing initial radius of bubble, and the cavitation intensity becomes weaken; meanwhile the cavitation intensity becomes stronger along with the increasing of ultrasonic intensity; and with the increasing of hydrostatic pressure or liquid viscous, the cavitation intensity becomes weaken. In achieving the same cavitation effect, the dual frequency ultrasound could decrease the ultrasonic intensity and occur transient cavitation to a bigger initial radius nucleus or relatively large hydrostatic pressure and liquid viscous.