双泡超声空化计算分析

将由速度势叠加原理得到的双泡超声空化动力学微分方程归一化,通过matlab语言编程计算,分析了水中空化泡的线度、双泡间距、声压幅值、声波频率等因素对空化过程的影响. 在双泡超声空化动力学微分方程中引入双频超声,探讨了双泡双频超声问题. 研究表明泡的线度是决定空化特性的主要因素,声压幅值对空化特性的影响最大,其次是超声波的频率;双泡间的相互作用影响空化特性,这种影响随双泡间距的增大而减弱;双频超声对双泡空化特性的影响有限,这种影响在两超声分量的声压幅值相等时较强. 关键词： 超声空化 双泡 双频超声

Computational analysis of double-bubble ultrasonic cavitation

Double-bubble ultrasonic cavitation dynamic differential equation obtained from superposition principle is normalized. MATLAB is used to analyse the effects of bubble linearity, double-bubble distance, sound frequency, sound pressure amplitude on cavitation process. Bifrequency ultrasound is introduced into the equation under discussion in this article. The calculation results show that bubble linearity is a main factor, which determines cavitation characteristics. The effect of sound pressure is strongest, and the frequency effect is the next strongest. Double bubble interactions affect cavitation characteristics to a certain extent, which reduces with distance increasing. Bifrequency ultrasound has a limited effect on cavitation characteristics, and it turns biggest when two component pressure amplitudes are equal.