原子能科学技术Issue(11)：2030-2035,6.DOI:10.7538/yzk.2015.49.11.2030
过冷度对蒸汽气泡破碎及微气泡喷射过程的影响
Effect of Subcooling on Vapor Bubble Collapse and Microbubble Emission
摘要
Abstract
In order to investigate the effect of subcooling on vapor bubble collapse and microbubble emission,the condensation process of vapor bubbles in a subcooled pool at different subcoolings was recorded with a high-speed video camera.The results show that the development of surface wave emerged on the bubble surface is slow and the vapor bubbles are condensed and split up gradually without sudden collapse at low sub-cooling (ΔTsub=17 K).At high subcooling (40 K<ΔTsub<75 K),the surface wave on the surface is violent and the vapor bubbles will collapse suddenly with the emission of a large number of microbubbles.Nevertheless,the process of tiny bubbles splitting off from large bubble is observed before sudden collapse of bubble at liquid subcooling of 30 K.The diameter and velocity of microbubbles after collapse of vapor bubble are within the same order of magnitude of those in microbubble emission boiling at 40 K<ΔTsub<75 K.Furthermore,the diameter of microbubble decreases,while the velocity increases with the increase of subcooling.In addition,the wave number of the surface wave on bubble surfaces increases and the maximum amplitude of the surface wave increases firstly and then decreases with the increase of subcooling.关键词
气泡微细化沸腾/气泡破裂/过冷度/界面波动Key words
microbubble emission boiling/bubble collapse/subcooling/surface wave分类
能源科技引用本文复制引用
唐继国,阎明,肖友军,阎昌琪,孙立成..过冷度对蒸汽气泡破碎及微气泡喷射过程的影响[J].原子能科学技术,2015,(11):2030-2035,6.基金项目
国家自然科学基金资助项目(51376052,11475048,51106101) （51376052,11475048,51106101）
四川大学科研基金资助项目(YJ201432) （YJ201432）
