摘要
用高速动态分析仪对低温倾斜上升管内不同位置处弹状汽泡和液弹长度分布进行了实验观测,对获得的观测结果进行统计分析,研究弹状汽泡和液弹长度的变化规律。结果表明:相同的倾斜角下,弹状汽泡平均长度随着x/D的增大而增大。在相同的x/D下,随着倾斜角度的减小弹状汽泡平均长度先增大后减小,在60°处最大。液弹长度的整体分布规律同弹状汽泡长度分布规律有明显差异。对于各种倾斜角度下,平均液弹长度随着x/D的增大而增大;同一x/D下,随着倾斜角度的减小,平均液弹长度先增大后减小,在60°处最大,说明管子从竖直倾斜后,有助于汽泡的聚合,使液弹长度增大,在45°角处,汽泡聚合减小使液弹长度减小。该文为进一步研究低温两相弹状流特性提供了依据。
The length distributions of Taylor bubble and liquid slug had been experimental studied in different axial position of cryogenic upward inclined pipe by using high speed motion analyzer. Statistical method was employed to analyze the experimental data. The results showed that the mean length of Taylor bubble was increasing with x/D at all angles. At given x/D, the Taylor bubble mean length increased first, and then decreased with inclined angle decreased, maximum at 60%. In general, there was great difference between liquid slug length distribution mode and Taylor bubble length distribution mode. The mean length of liquid slug was increasing with x/D at all angles. The liquid slug mean length increased first, and then decreased with inclined angle decreased, maximum at 60%at given x/D. This result showed Taylor bubbles were easier to coalescence with inclined angle decreased, but coalescence lessening at 45%. These conclusions provide a basis for further study of cryogenic slug flow characteristic.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第7期1167-1170,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50476015)
国家高技术研究发展计划(863)项目(No.2006AA09Z333)
关键词
弹状汽泡
液弹
长度分布
低温
统计方法
Taylor bubble
liquid slug
length distribution
cryogenic
statistical method
