低含液率多相管路平均持液率

The experimental study on average holdup in multiphase pipelines with low loads of liquids was conducted on a large multiphase flow loop.The average holdup increased with increasing liquid load and decreased with increasing gas velocity, and also depended on the undulation of pipeline and flow patterns in the pipeline. The effects of eight dimensionless parameters on average holdup were seriated with grey relational degree analysis so as to find the most important factors affecting the average holdup in multiphase pipelines with low loads of liquids. An average holdup correlation based on low liquid loads was also developed and the correlation related the most important three factors including superficial gas velocity number(N_ gw), superficial liquid velocity number(N_ lw) and liquid Reynolds number(Re_l) to the average holdup.Finally the correlation was tested with the field data and the result was satisfying.

基于正交试验设计的管线积液规律研究

为研究不同起伏类型天然气集输管线积液形成的主要因素,应用正交试验设计分析倾角、入口温度、出口压力、气液比、管道直径及流量对平均持液率的影响,分析“Ⅴ”型与“∧”型起伏管线的平均持液率变化规律,并确定影响平均持液率的主控因素,选出最优水平组合。结果表明:两种类型的起伏管线平均持液率变化基本重合。对于“Ⅴ”型起伏管线,持液率的影响程度依次是倾角、出口压力、管道直径、气液比、流量、入口温度;而对于“∧”型起伏管线,对持液率影响最小的是流量。两种不同类型的起伏管线均在A_(4)B_(5)C_(1)D_(5)E_(1)F_(5)时平均持液率最小。

水平管气液两相流清管瞬态过程试验研究

利用内径为80mm,全长为350m的室外大型多相流试验环道进行了气液两相流的清管通球试验,介绍了清管试验环道装置和流程以及多相流数据采集系统,测得了通球时的集液量、清管时间、清管球运行速度变化规律,计算得到了清管时的平均持液率,分析了各流动参数和沿线各点的压力、压差变化规律。