管内低温两相弹状流特性试验研究——弹状气泡长度分布  

Experimental Study on the Cryogenic Two-Phase Slug Flow Characteristic in a Tube——Taylor Bubble Length Distribution

作　　者：王淑华[1] 张华[1] 王经[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《上海交通大学学报》2009年第8期1289-1292,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50476015);国家高技术研究发展计划(863)项目资助(2006AA09Z333)

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气泡进行了试验观测,试验所用管内径为18 mm,长为1.0 m,管路与水平方向的夹角范围为45°～90°,并对获得的气泡长度进行统计分析,研究弹状气泡长度的变化规律.结果表明：在各种倾斜角度下,弹状气泡平均长度随着x/D（D为管内径）的增加而增大;垂直管内,标准偏差随着x/D的增加而增大;倾斜管内,当倾斜角度大于45°时,随着x/D的增加,先增大而后减小.在相同x/D下,随着倾斜角度的减小,平均弹状气泡长度先增大而后减小,在60°处最大.当管微倾斜时,气泡聚合加快;当倾角达到45°时,气泡的聚合又减小.The length distribution of nitrogen Taylor bubble was experimentally studied in different axial position of cryogenic upward inclined tube by using high speed motion analyzer. The experimental tube is 0. 018 m in ID and 1.0 m in length. The range of the inclination angle is 45°～90° from the horizontal. Sta- tistical method was employed to analyze the data of Taylor bubble length. The results show that the mean length of Taylor bubble increases with x/D at all angles. The standard deviation increases with x/D in vertical tube, and it increases first, and then decreases in inclined tube when the inclination angle is greater than 45°. The Taylor bubble mean length increases first, and then decreases with the decrease of the inclined angle, the maximum is at 60° position. This result shows that Taylor bubbles are easy to coalesce when the tube is inclined, but the coalescence lessens at inclined angle of 45°.

关 键 词：弹状气泡 长度分布 低温 统计方法 

分 类 号：O359.1[理学—流体力学]