密封式防积液短节设计及其携液效果分析  

Design of A Sealed Anti-Effusion Short Joint and Analysis of Its Liquid-carrying Effect

作　　者：徐建宁[1] 赵义鹏 李万钟[1] 朱端银[1] Xu Jianning;Zhao Yipeng;Li Wanzhong;Zhu Duanyin(School of Mechanical Engineering,Xi an Shiyou University)

机构地区：[1]西安石油大学机械工程学院

出　　处：《石油机械》2022年第11期119-125,132,共8页China Petroleum Machinery

基　　金：校企合作项目“东海含水气藏海上柱塞气举工艺技术研究”(ZX2021CGCF1353)。

摘　　要：涡流工具在输气管线中因端面流体碰撞和间隙流失会引起螺旋流强度不够,进而导致在起伏段携液效果不佳。针对该现象,设计了一种带有导流锥的密封式防积液短节。分别建立了光滑管线、有涡流工具管线和有密封式防积液短节管线的有限元模型,使用计算流体力学的方法对3种模型的流场速度、静压和含液体积分数及其各自的变化规律进行了分析和对比。研究结果表明:防积液短节的导流锥和密封式螺旋流道可有效减少流体碰撞和间隙流失,其引发的螺旋流强度比涡流工具更高,所在管线的流体轴向速度和切向速度得到了提升;管线的静压分布和上倾段液相回流现象得到了改善,气液分界面更加明显,携液距离增加,流型转变更彻底,证明密封式防积液短节比涡流工具具备更佳的携液效果。研究结果可为密封式防积液短节的开发及应用提供一定的理论依据。In the gas pipeline,vortex tools will cause insufficient spiral flow strength due to end-face fluid collision and gap loss,which will lead to poor liquid-carrying effect in the undulating sections of the pipeline.For this phenomenon,a sealed anti-effusion short joint with diversion-cone was designed.The finite element models of smooth pipeline,pipeline with vortex tools and pipeline with sealed anti-effusion short joints were established respectively.The flow field velocity,static pressure and liquid volume fraction of the three models and their respective variation rules were analyzed and compared by using computational fluid dynamics.The results show that the diversion-cone and the sealed spiral channel of the anti-effusion short joint can effectively reduce the fluid collision and gap loss,and its spiral flow intensity is higher than that of vortex tool.The fluid axial velocity and tangential velocity in the pipeline are increased.The static pressure distribution of the pipeline and the phenomenon of liquid backflow in the updip section are improved.The gas-liquid interface is more obvious,the liquid-carrying distance is increased,and the flow pattern is changed more thoroughly.Therefore,the sealed anti-effusion short joint has better liquid-carrying effect than vortex tools.The study results can provide a theoretical basis for the development and application of sealed anti-effusion short joints.

关 键 词：输气管线 涡流工具 密封式防积液短节 螺旋流强度 携液效果 导流锥 螺旋流道 

分 类 号：TE832[石油与天然气工程—油气储运工程]