原子能科学技术 ›› 2021, Vol. 55 ›› Issue (2): 237-244.DOI: 10.7538/yzk.2020.youxian.0124

• 反应堆工程 • 上一篇    下一篇

气泡破裂及其诱发射流液滴释放过程的实验研究

李文强;杨宜昂;焦守华;柴翔   

  1. 上海交通大学 核科学与工程学院,上海200240
  • 出版日期:2021-02-20 发布日期:2021-02-20

Experimental Investigation of Bubble Bursting and Its Induced Jet Droplet Release

LI Wenqiang;YANG Yiang;JIAO Shou-hua;CHAI Xiang   

  1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Online:2021-02-20 Published:2021-02-20

摘要:

本文基于实验方法,通过高速摄像的方法捕捉不同直径下的气泡破裂过程及射流液滴的释放过程,获得了气泡破裂后气泡空腔的演变过程,捕捉了射流液滴的速度,探究了气泡直径和气泡表面寿命对射流液滴释放过程的影响规律。实验结果表明,气泡表面寿命对气泡破裂产生射流液滴的过程有着重要影响。随气泡表面寿命的增加,破裂气泡产生的射流液滴的速度也随之增加。当气泡直径较小时,气泡表面寿命呈现Rayleigh分布的特征,射流液滴的释放概率也较高。随气泡直径的增加,气泡表面寿命逐渐转变为指数衰减分布的特征,射流液滴的释放概率也随之下降。基于现有实验数据给出了一个精度更高的射流液滴速度与气泡直径关系式。

关键词: 气泡破裂, 射流液滴, 表面寿命, Rayleigh分布

Abstract:

Based on experimental method, bubble bursting process and jet droplet release process under different diameters were captured by high speed camera. The evolution process of bubble cavity following bubble bursting was obtained. The velocity of jet droplet was captured. The effect of bubble diameter and bubble surface lifetime on jet droplet release process was studied. The experimental results show that bubble surface lifetime has a significant influence on process of jet droplet generated by bubble bursting. As the bubble surface lifetime increases, jet droplet velocity will also increase. When the bubble diameter is small, bubble surface lifetime distribution is characterized by Rayleigh distribution and the release probability of jet droplet is high. As bubble diameter increases, distribution law of bubble surface lifetime gradually shifts to exponential-decay distribution, the release probability of jet droplet decreases. A more accurate correlation between jet droplet velocity and bubble diameter was obtained based on current experimental data.

Key words: bubble bursting, jet droplet, surface lifetime, Rayleigh distribution