摘要
采用高速摄像仪研究了液滴在不同韦伯数和撞击角下撞击干燥平板时的铺展行为。结果表明,当撞击角相同时,韦伯数越小,液滴最大横向铺展直径也越小;韦伯数相同,撞击角越大,液滴横向铺展直径越大;在铺展和回缩过程中,环形液层外圈相对于内圈在达到横向最大铺展直径时具有滞后现象。
A high speed camera was used to research the spread behavior of a single droplet impacting on the dry surface at different Weber number and impact angles. The results showed that at the same impact angle the maximum transverse spread diameter decreased with the decreasing of the Weber number, and at the same Weber number the maximum transverse spread diameters increased with the increasing of the impact angle. During the process of spread and retraction, the external circle of the annular droplet lagged behind the inner circle of the annular droplet when the annular droplet spread the maximum diameter.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2007年第6期505-511,共7页
Chemical Reaction Engineering and Technology
基金
国家重点基础研究发展规划项目(2004CB217703)
教育部新世纪优秀人才资助计(NCET-05-04137)
关键词
液滴撞击
铺展直径
撞击角
drop impact
spread diameter
impact angle
