气液混输管线间歇流动压降研究  

Study of the Pressure Drop During Gas-Liquid Intermittent Flow in a Horizontal Pipeline

作　　者：李志彪[1] 许晶禹[2] 吴应湘[2] 

机构地区：[1]中国石油天然气股份有限公司规划总院,北京100083 [2]中国科学院力学研究所,北京100080

出　　处：《管道技术与设备》2011年第1期4-8,共5页Pipeline Technique and Equipment

基　　金：国家自然科学基金项目(10902114)

摘　　要：间歇流动是水平混输管线的主要流动形式,压降是两相流动中的关键参数之一,对间歇流动压降进行了详细的实验研究和理论研究。实验工作是利用水-空气和油-空气作为介质在长约30 m、内径分别为50 mm和25 mm的管线上完成的。实验发现液相黏度越大,两相流动压降越大。气相表观速度或液相表观速度的增加都会使压降增大,但增加液相表观速度时压降增大幅度更大。管径对两相流动压降有很大的影响,这种影响与液相表观速度和液相黏度有关。液相表观速度越大,管径影响越大;液相黏度越小,管径影响越大。用常用的Lockhart-Martinelli模型进行了验证,该模型用于水-空气流动时比较准确,但对于油-空气流动,该模型计算结果偏差较大。提出了分相流模型的改进模型,该模型能更好地计算油-空气间歇流动压降。Intermittent flow is a most common flow pattern in a horizontal transportation pipeline and pressure drop is one of the essential parameters in twophase flow.In this work,intermittent flow pressure drop has been studied experimentally and theoretically.Experiments were carried out in 30 meterlong horizontal pipes of 50 mm i.d.and 25 mm i.d.respectively by using water-air and oil-air as the media.It is shown that the pressure liquid velocity.The effect of the superficial liquid velocity on the pressure drop is greater than that of the superficial gas velocity.The pipe＇s diameter also has a large effect on the intermittent flow pressure drop and this effect is determined by liquid viscosity and velocity.Furthermore,the Lochkart-Martinelli model can be used to estimate the pressure drop for water-air two-phase intermittent flow.But for oil-air two-phase flow,this model has a noticeable deviation regarding the results of computation.The improved separtated-phase model can estimate the oil-air two-phase flow pressure drop exactly.

关 键 词：混输管线 间歇流动 压降 Lockhart-Martinelli模型 分相流模型 

分 类 号：TE8[石油与天然气工程—油气储运工程]