顶部节流条件下S型柔性立管内油气水三相流流型转变实验研究  

Experimental Study on Flow Pattern Transition of Oil-Gas-Water Three Phase Flow in S-Shaped Flexible Riser on the Effect of Topside Chocking

作　　者：李乃良[1] 郭烈锦[1] 李文升[1] 叶晶[1] 张西迎 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]中海石油(中国)有限公司湛江分公司,广东湛江524000

出　　处：《工程热物理学报》2011年第4期597-601,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金委创新群体基金项目(No.50821064);国家科技重大专项(No.2008ZX05026-004-002)

摘　　要：实验研究了集输-立管系统中,立管顶部节流条件下S型柔性立管内油气水三相流流型及其转变机理。发现,随着阀门开度的减小,S型柔性立管内依次会出现严重段塞流、类弹状流和类泡状流。背压的升高是促使流型发生转变的原因,升高的背压抵消了立管上游封闭气体的压力,从而抑制了立管内气相的运动速度。本文建立了节流过程中S型柔性立管内流型间转变的模型,与实验数据吻合良好。分析还表明,垂直上升管内得出的气液两相流型的PDF特征不能适用到S型柔性立管中。Flow patterns of oil-gas-water three phase flows in S-shaped riser and their transition mechanism on the effect of topside choking were studied in pipeline-flexible riser system.Three flow patterns i.e.typical severe slugging,slug-like flow,and bubble-like flow,were observed in flexible riser with decrease in valve opening.It＇s found backpressure increase accounts for the flow pattern transition.The increase in backpressure counteracts the pressure of gas trapped in downward pipeline,resulting suppression on the slug acceleration.Flow pattern transition model presented in this work agreed well with experimental data.Experimental results show PDF distribution characteristics of flow patterns in upward vertical pipe cannot be applied to S-shaped flexible riser.

关 键 词：油气水三相流 流型转变 节流 严重段塞流 柔性立管 

分 类 号：O359[理学—流体力学]