超临界CO_2流体中空化泡动力学过程分析  

Analysis of dynamics for the cavitation bubble in supercritical fluid CO_2

作　　者：杨日福[1] 丘泰球[2] 

机构地区：[1]华南理工大学物理科学与技术学院,广东广州510640 [2]华南理工大学轻化工研究所,广东广州510640

出　　处：《计算机与应用化学》2008年第8期931-934,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金(20776047).

摘　　要：考察各参数影响超临界CO_2流体中超声空化动力学过程的规律。应用非线性Rayleigh-Plesset方程模拟空化泡运动过程,利用Matlab软件编程求数值解,结果:空化泡初始半径或超声波频率增大,空化变易,强度变弱;超声波的声压幅值增大,空化变易,强度变强;超临界CO_2流体的压力的增大,空化变难,强度变弱;温度不会影响空化的难易程度,只是随着温度升高,强度变强。The effects of each parameter for the cavitation bubble dynamics in supercritical fluid CO2 were studied. The motion of the bubble was simulated by using the Rayleigh-Plesset equation and solved by using the soft Matlab, The results is showed that in Supercritical Fluid CO2 the ultrasonic cavitation becomes easier along with the increase of the bubbles＇ original radius or the ultrasonic frequency, and the cavitation intensity becomes weaken ; that the ultrasonic cavitation becomes easier along with the increase of the acoustic pressure, and the cavitation intensity becomes stronger; that the ultrasonic cavitation becomes more difficulty along with the increase of the supercritical fluid CO2 pressure, and the cavitation intensity becomes weaken ; that the ultrasonic cavitation becomes as difficulty as those along with the increase of the supercritical fluid CO2 temperature, but the cavitation intensity becomes stronger.

关 键 词：超临界CO2流体 超声 空化泡 动力学过程 R—P方程 

分 类 号：O427.4[理学—声学]