输气管道低洼处积液携带特性实验研究  

Experimental Study on the Carrying Characteristics of Effusion in Low-lying Segments of Gas Transmission Pipelines

作　　者：蔡跃跃 饶永超 王树立 葛昊 梁俊 孙毅 

机构地区：[1]江苏省油气储运技术重点实验室 [2]常州大学石油工程学院

出　　处：《油气田地面工程》2018年第10期10-15,共6页Oil-Gas Field Surface Engineering

基　　金：国家自然科学基金资助项目(51574045)

摘　　要：输气管道在一定的温度和压力条件下产生的凝析液以及本身自带的液态水会造成管道内积液,特别是在弯管低洼处,由于重力作用产生回流使积液问题更加严重。以自行设计的输气管道积液携带装置为实验平台,起旋装置为扭带,空气和自来水为实验工质,利用高速相机观察并分析在有无螺旋流条件下弯管低洼处积液的气液界面波动特点和携带规律,研究了流速、扭率、积液量等因素对弯管处积液携带效率的影响。研究结果表明:随着表观流速的增加,气液界面波动越来越大,当达到携带临界流速时积液被携带走,且流速越大携带效率越高;有旋流动时产生的湍动能较大,更易使气液界面失稳产生波动,且积液携带效率更高;相比无旋流动时,有旋流动各阶段的临界流速比较小;各阶段临界流速还和积液量有关,积液量越少,各阶段临界流速越大;有螺旋流情况下比无旋流情况下界面波动大,波峰间距更小。The condensate liquid produced under certain temperature and pressure as well as its own liquid water can cause the accumulation of liquid in the pipeline.Especially in bends and low areas,backflow due to gravity makes the fluid accumulation problem more serious.The self-designed carrying device for effusion of gas transmission pipelines is taken as the experimental platform,the rotating device as the bond,the air and water as the experimental medium.The fluctuation characteristics and carrying laws of the gas-liquid interface in low-lying and fluid-accumulation areas under the condition of spiral flow are observed and analyzed by using the high-speed camera,and the effects of flow rate,twist rate and effusion volume on the effusion carrying efficiency in bends are studied.The research results show that with the increase of apparent velocity,the fluctuation of the gas-liquid interface is increasing,and when the critical velocity is reached,the effusion is carried away,and the higher the velocity is,the higher the efficiency is;the turbulent kinetic energy produced by spiral flow is larger and more prone to the instability of the gas-liquid interface,and the effusion carrying is more efficient;compared with the non-spiral flow,the critical velocity in each phase of the spiral flow is smaller than that of the non-spiral flow;the critical velocity of each stage is also related to the volume of fluid accumulation,and the smaller the volume of fluid accumulation,the greater the critical velocity at each stage;in the case of spiral flow,the interface fluctuation is larger than that of the non-spiral flow,and the distance between the peaks is smaller.

关 键 词：输气管道 积液 螺旋流 界面波动 流速 

分 类 号：TE973[石油与天然气工程—石油机械设备]