天然气液烃输送管道非平衡汽液相变及两相流动研究进展  

Research Progress on Non-equilibrium Two-phase Flow in Natural Gas Liquid Transmission Pipelines

作　　者：贾文龙 罗强 李长俊 JIA Wen-long;LUO Qiang;LI Chang-jun(School of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500

出　　处：《科学技术与工程》2018年第22期165-173,共9页Science Technology and Engineering

基　　金：国家自然科学基金(51404206)资助

摘　　要：天然气液烃(NGL)的主要成分是乙烷、丙烷、丁烷等低碳烷烃。在压力瞬变工况下,储运设备中的NGL汽液相变过程很难在瞬间达到热力学平衡状态,由此引发非平衡、非稳态的汽液两相流动。综述了NGL非平衡汽液相变机理及传热传质速率计算方法、非平衡汽液两相管流数学模型与数值模拟方法的研究进展。指出应着重开展以下三方面的研究:第一是采用实验和理论相结合的方法,探究NGL非平衡汽液相变的微观机理,建立汽液相间非稳态传热传质模型;第二是考虑非稳态传热传质过程与管道压力、温度、流速等参数之间的耦合作用,基于流体力学理论和非平衡态热力学理论,建立伴随非平衡汽液相变的NGL输送管道两相流动数学模型,研究模型的数值求解方法;第三是开发NGL输送管道仿真软件,揭示NGL汽液两相管流参数变化规律,为NGL输送管道的设计、运行和管理提供理论和技术支撑。The natural gas liquid(NGL)mainly is composed of light alkanes,such as ethane,propane,butane etc.In transmission pipelines,vapor-liquid change of the NGL cannot instantaneously reach the thermodynamic equilibrium state,which indicates the presence of the non-equilibrium and unsteady two-phase flow in pipelines.Research progress regarding the topics including mechanism of non-equilibrium vapor-liquid phase change,methods of predicting heat and mass transfer rates between vapor and liquid phases,and numerical simulation methods for the non-equilibrium two-phase pipe flow are reviewed.In the future,the following three aspects are suggested to be researched:①use the experimental and theoretical methods to research the micro-mechanism of the vapor-liquid phase change,and to build corresponding unsteady state heat transfer and mass transfer models between vapor and liquid phases;②build the numerical simulation model for the non-equilibrium two-phase pipe flow based on the fluid mechanical and non-equilibrium thermodynamic methods,and research numerical solution methods for the developed model;③develop the simulation software for NGL transmission pipelines,and use the developed software to predict the flowing parameters of two-phase NGL transmission pipelines.Achievements will contribute to improvements in the design,operating and management of NGL pipelines.

关 键 词：天然气液烃 管道 汽液两相流 非平衡态热力学 研究进展 

分 类 号：TE832[石油与天然气工程—油气储运工程]