摘要
本文对液体内的声空化气泡的成长与破裂过程进行数值计算,得到各种情况下气泡壁的运动情况。通过对不同初始半径、不同频率下声空化气泡运动的计算,得到空化气泡半径小于共振半径,可以增强空化效果,而单一的增强声场的频率并不一定能加强声空化效果,为增强空化效果提供理论依据。研究各种信号作用下声空化气泡成长情况,明确方波信号激励下的气泡生长半径最大,三角波激励下的气泡生长最小。
The numerical calculation of the development and collapse processes of the acoustic cavitation bubbles and the movements on the boundary on various conditions are presented.The calculation of the movements of the acoustic cavitation bubbles in different radius and frequencies conducts a conclusion that if the radius of the cavitation bubble smaller than the resonance radius, the effect of cavitation can be enhanced.However,it is uncertainty that if enhance the frequency of the sound field only.Various signals acting on the acoustic cavitation bubbles has been studied and the results show that the radius of the bubble which is stimulated by square signal is the biggest and the radius of the bubble which is stimulated by triangular signal is the smallest.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第1期17-20,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50406011)
重庆市自然科学基金(No.CSTC2007BB6184)
关键词
声空化气泡
成长
破裂
acoustic cavitation bubbles
development
collapse