摘要
利用高速摄像方法实验研究了自由空间内悬挂气泡的破碎过程,分析了气泡破碎过程中半封闭曲面液膜整体形变的发生原因,探讨了曲面液膜破碎过程各个阶段的边缘液膜卷曲特性。研究结果表明,悬挂气泡排液过程导致的液膜厚度局部减薄,是造成气泡破碎初始阶段边缘液膜卷曲角速度增大的主要原因;在扰动波延迟阶段,边缘液膜卷曲角速度呈现逐渐降低的趋势;在膜液滴分离阶段,边缘液膜卷曲角速度基本维持不变,破碎液膜表面势能主要转化为膜液滴分离动能和边缘液膜切向/径向动能。
The high-speed camera was used to study the suspended bubbles brusting process in free space.The causes of the deformation of the semi-closed curved liquid film during bubble brusting process were analyzed.The edge liquid film characteristics of the curved liquid film breakup process were discussed.The results show that the main reason for the increase of the curl angular velocity in the initial stage is the local thinning of the liquid film thickness caused by the suspension bubble drainage process..During the disturbance wave delay stage,the edge liquid film curling angular velocity tends to decrease gradually.In the droplets separation stage,the curl angular velocity remains basically unchanged.The surface potential energy of the crushed liquid film is mainly converted into the droplets separation kinetic energy and the edge liquid film tangential/radial kinetic energy.
作者
刘联胜
刘莹
段润泽
王子月
方欢
LIU Lian-Sheng;LIU Ying;DUAN Run-Ze;WANG Zi-Yue;FANG Huan(School of energy and environmental engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第12期3001-3007,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.51276055)
天津市科技支撑计划-科技服务业重大专项(No.14ZCDZGX00821)
河北省应用基础研究计划重点基础研究项目(No.13964308D)
河北省高等学校科学技术研究项目(No.QN2017050)。
关键词
气泡破碎
自由空间
液膜形变
卷曲特性
bubble bursting
free space
liquid film deformation
curl characteristics
