摘要
本文对垂直低温两相流弹状汽泡的上升速度运用高速摄像机进行了可视化实验研究,对所采集的实时图像进行处理。在Moissis等和Takatoshi弹状汽泡上升速度经验公式的基础上,通过对弹状汽泡的上升速度的分析,提出了圆管内弹状汽泡的上升速度的拟合公式,分析研究其变化规律,为进一步探求圆管内液氮弹状汽泡的生成机理提供依据。
Nitrogen bubble rising velocity in bottom of circular pipe has been studied by virtual experiment with high-speed camera.The obtained images are processed systematically.Based on Cole's and Mendelson's empirical formula of bubble rising velocity,fitting formula of nitrogen bubble rising velocity in bottom of circular pipe has been acquired through analyzing nitrogen bubble rising velocity.Through this experiment,we research rising velocity's change law,which is the spade work to study propagation mechanism of nitrogen slug bubble in circular pipe.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第z1期197-200,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金的资助(No.50476015)
关键词
高速摄像机
液氮汽泡
上升速度
图像处理
拟合公式
high-speed camera
nitrogen bubble
rising velocity
image process
fitting formula
