水平管中段塞流的发展特性  

EVOLUTION OF SLUG FLOW IN HORIZONTAL PIPES

作　　者：吕宇玲[1] 何利民[1] 洪启林 罗小明[1] 

机构地区：[1]中国石油大学储运与建筑工程学院,山东东营257061 [2]华东管道设计研究院,江苏徐州221008

出　　处：《工程热物理学报》2008年第6期967-970,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50676109)

摘　　要：气液两相段塞流是液塞和长气泡在空间和时间上的交替,在流动过程中表现出发展特性。本文对段塞流单元中的液塞、长气泡的速度和长度以及长气泡的合并沿流动方向的特性进行了分析.结果表明:液塞速度分布符合正态分布,液塞与长气泡的平均速度在同一点是相等的,它们随离管道入口距离的增加而缓慢增加.液塞长度分布符合对数正态分布,液塞的平均长度基本保持不变,而长气泡的平均长度则增加.长气泡长度增加是因为气体膨胀的结果,气泡的合并率由液相折算速度和离管道入口的距离决定.Slug flow is an alternation in space and time of long bubbles and liquid slugs. The evolution of slug flow was investigated in 40 m long, 50 mm i.d. horizontal pipes. The results indicate that the distribution of liquid slug velocities could be well fitted by normal distributions, mean velocity of both slugs and bubbles are equal in each test sections. They increase slightly with the distance from inlet. The effect comes from pressure drop, which tends to decrease the gas density and to increase gas superficial velocity. The distribution of liquid slug lengths obeys log-normal distribution. The mean slug length remains nearly constant in contrast to the mean bubble length increasing slightly. The increase in bubble length results mainly from gas expansion. The rate of coalescence depends On both the liquid flow rate and the distance from inlet.

关 键 词：段塞流 液塞 长气泡 发展特性 合并 

分 类 号：O359[理学—流体力学]