摘要本文使用高速摄影技术,研究了在固体表面上形成的半球形空泡的动力学以及两个空泡间的相互作用机制。通过调整激光参量以及空泡间距来实现强相互作用和弱相互作用,分别记录下不同阶段下的双空泡的半径和间距,做出其随时间变化的曲线,并与单空泡的脉动情况作比较,找到空泡间相互作用的规律。
一个独立的空泡生长为半球形空泡,它的半径可以由Rayleigh-Plesset方程来很好的表述 。当靶材表面的壁效应忽略不计时,一个半球形空泡的生长情况可以类比于一个自由空泡。两种相互作用机制的不同取决于初始两空泡的间距和两空泡的最大半径,研究双空泡的相互作用是探究空泡群间相互作用的第一步。21831
关键词 双空泡 高速摄影 空泡半径 间距 毕业论文设计说明书(论文)外文摘要
Title Experimental study of interaction between two laser-induced bubbles
Abstract
Using high-speed photography, the dynamics of hemisphere cavitation bubbles on a solid surface and two interaction regimes of bubble pair have been presented in this paper.By adjusting the laser parameters and cavity spacing to achieve strong and the weak interaction.Were recorded at different stages of double cavity radius and spacing.Recorded respectively under the different stages of double cavity radius and spacing, make its time evolution of the radii and the distance , and comparing with single cavity pulsation, then find out the laws of interaction between cavity
As an isolated bubble grows with a hemispherical shape with a radius well described by the Rayleigh-Plesset equation,we assume an analogy between a free bubble and the hemispherical bubble growing on the solid surface where the wall effect is negligible and acts only as a mirror。the mechanisms of bubble-bubble interaction differ, depending on the ratio of initial spatial distance and maximum radii of the two bubbles. It is the first step towards the understanding of the multi-bubbles interaction.
Keywords Double cavity high-speed photography Cavity radius
distance
目 次
1 引言 2
1.1 研究背景及意义2
1.2 激光空泡研究进展 2
1.3 本文的主要工作3
2 激光空泡理论4
2.1 激光等离子空泡的形成机理 4
2.2 空泡运动物理过程 4
2.3 双空泡运动方程 4
2.4 探测方法 6
3 实验装置及实验步骤 7
4 实验结果及分析 8
4.1 独立空泡 8
4.2 双空泡的相互作用 10