向上倾斜管中气液两相流流型实验研究与数值模拟

发布时间：2018-05-31 19:04

本文选题：向上倾斜管道 + 气液两相流　；参考：《东北石油大学》2015年硕士论文

【摘要】：在油田现场,严格意义上的水平管道和垂直管道很少,研究倾斜管道更具实际意义。在倾斜管道中,随着温度和压力的变化,气液两相混合流动是非常普遍的现象,而时间和空间上均不确定的相界面,给气液两相流研究带来极大的困难。本文采用室内实验和数值模拟相结合的方法,研究向上倾斜管道中气液两相流的流型,认识流型特征和形成机制,为计算气液两相流在倾斜管道中压力梯度和持液率等其它相关参数提供理论基础。本文的主要研究内容包括以下几个方面:本文根据两相流基本理论,介绍气液两相流基本参数计算方法以及倾斜管中气液两相流的流型和判别方法,为后面研究气液两相流的流型提供理论基础。在多相流实验管路系统中,设计向上倾斜管道中气液两相流的实验方案和流程,进行气液两相流流型实验研究,识别气液两相流的流型,描述向上倾斜管中气液两相流的流动特征,并绘制气液两相流流型图,分析管道倾斜角对流型转变的影响。并利用COMSOL Multiphysics软件,选用非稳态求解器,对向上倾斜管中气液两相流中不同时刻的体积分数进行数值模拟研究,判别气液两相流的流型,分析气相折算速度、液相折算速度和管道倾角对流型的影响。气液两相流的流型研究是两相流流动规律和机理研究的核心问题,直接影响到其它问题的分析研究。因此,开展气液两相流流型数值模拟与实验研究,具有十分重要的理论和实际意义。在理论上,可为研究两相流摩擦阻力、界面含气率和压降等参数的准确计算提供理论基础;在工程上,可为管道运行压力设计提供依据,确保管道运行的安全性和经济性。
[Abstract]:In oil field, there are few horizontal and vertical pipelines in strict sense, so it is more practical to study inclined pipelines. In inclined pipes, with the change of temperature and pressure, the gas-liquid two-phase mixed flow is a very common phenomenon, and the uncertain phase interface in time and space brings great difficulties to the study of gas-liquid two-phase flow. In this paper, the flow pattern of gas-liquid two-phase flow in an upward inclined pipe is studied by means of laboratory experiments and numerical simulation, and the characteristics and formation mechanism of the flow pattern are recognized. It provides a theoretical basis for calculating the pressure gradient and liquid holdup of gas-liquid two-phase flow in inclined pipes. The main research contents of this paper are as follows: according to the basic theory of two-phase flow, this paper introduces the calculation method of basic parameters of gas-liquid two-phase flow and the flow pattern and discriminating method of gas-liquid two-phase flow in inclined tube. It provides a theoretical basis for the later study of the flow pattern of gas-liquid two-phase flow. In the multiphase flow experimental pipeline system, the experimental scheme and flow chart of gas-liquid two-phase flow in upward inclined pipe are designed, and the experimental study of gas-liquid two-phase flow pattern is carried out to identify the gas-liquid two-phase flow pattern. The flow characteristics of gas-liquid two-phase flow in an upward inclined tube are described, and the flow pattern diagram of gas-liquid two-phase flow is drawn. The numerical simulation of volume fraction at different times in gas-liquid two-phase flow in upward inclined tube is carried out by using COMSOL Multiphysics software, and the flow pattern of gas-liquid two-phase flow is distinguished, and the gas phase conversion velocity is analyzed. The effect of liquid conversion velocity and pipe inclination convection pattern. The study on the flow pattern of gas-liquid two-phase flow is the core problem in the study of the law and mechanism of two-phase flow, which has a direct impact on the analysis and study of other problems. Therefore, the numerical simulation and experimental study of gas-liquid two-phase flow patterns are of great theoretical and practical significance. Theoretically, it can provide a theoretical basis for the accurate calculation of friction resistance, gas holdup and pressure drop of the interface, and provide a basis for the design of pipeline operating pressure in engineering to ensure the safety and economy of pipeline operation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE832

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