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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Investigation of the droplet-carrying characteristics of the gas flow in multiphase pump valves
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Investigation of the droplet-carrying characteristics of the gas flow in multiphase pump valves

机译：多相泵阀中气流液滴的研究

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In high gas-bearing conditions, the oil phase-in the form of droplets- often enters the reciprocating multiphase pump via the valves. Understanding the droplet-carrying characteristics of the gas flow is important for determining the transport capacity and stability of multiphase pump valves. In this paper, the turbulent gas flow and droplet movement behaviors in three typical valves of the reciprocating multiphase pumps were studied mainly by the theoretical analysis, the numerical simulation of computational fluid dynamics (CFD) and the verification test of particle image velocimetry (PIV). The steady and transient droplet trajectories, concentration distributions, and passing capacities were comprehensively studied with different valve openings, Reynolds numbers, and two-phase slip conditions. The results show that the ball valve performs steadily during the transport of the small to large droplets, while the cone valve and the disk valve perform well when transporting the small droplets with d <= 250 mu m and the medium-sized droplets with 300 mu m <= d <= 600 mu m Under the initial conditions, respectively. Finally, the correlations of the volume mean diameter (d(vm)) of the droplets successfully passing through the cavities were proposed for the three valves. The results of this study are beneficial to help optimize and design new high-efficiency multiphase transport systems. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：在高燃气条件下，油相 - 液滴的形式 - 通常通过阀门进入往复式多相泵。理解气流的液滴特性对于确定多相泵阀的传送容量和稳定性是重要的。在本文中，主要通过理论分析研究了往复式多相泵的三个典型阀中的湍流气流和液滴运动行为，计算流体动力学（CFD）的数值模拟和粒子图像Velocimetry（PIV）的验证试验。通过不同的阀门开口，雷诺数和两相滑动条件综合研究了稳定和瞬态的液滴轨迹，浓度分布和传递能力。结果表明，球阀在将小液滴的运输过程中稳定地执行，而锥形阀和盘阀在用D <= 250 mu m和300μm的中型液滴输送小液滴时执行良好分别在初始条件下m <= d <= 600 mu m。最后，提出了三个阀的液滴的体积平均直径（D（Vm））的相关性。本研究的结果有利于帮助优化和设计新的高效多相运输系统。 （c）2020化学工程师机构。 elsevier b.v出版。保留所有权利。

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