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Simulation of Flow Characteristics of Gas-water Slug Flow in Horizontal Pipes

Author: SongZuo
Tutor: DongFeng
School: Tianjin University
Course: Detection Technology and Automation
Keywords: Gas - Water Slug flow Flow characteristics Numerical simulation FLUENT
CLC: TB126
Type: Master's thesis
Year: 2010
Downloads: 93
Quote: 2
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Abstract


The gas-liquid two-phase flow is the widespread mobility patterns in the natural world and the industrial production process. Air-water slug flow is an important part of the gas-liquid two-phase flow, due to the complexity of the flow state, multi-parameter changes accurately predict slug flow characteristics and parameters has been the focus of scientific research at home and abroad with difficulty. Slug Flow Characteristics at home and abroad mainly in field experiments and theoretical analysis, and has made great progress, and modern computational fluid dynamics technology as a means of research is still a minority. This article from the mechanism of two-phase flow using numerical simulation technology, horizontal tube gas-water two-phase flow characteristics of the slug flow. The main work done as follows: 1. Starting from the mechanism of Slug Flow in FLUENT software to complete the the horizontal pipe gas-water two-phase slug flow in a two-dimensional non-steady-state simulation, slug flow formation process gas holdup and bomb unit, The velocity, pressure and turbulent viscosity distribution. Default section at the speed of change of the observed velocity relationship derived the bomb unit within the membrane area and bomb area, characteristics and fluctuations repeatability study slug stray bullet unit structure. By analysis with the position change of the trend of the pressure on the shells unit area drop Cause inductive voltage drop based on this formula. Extract the slug flow characteristics for further study slug flow development process flow state and numerical information, slug flow study \the distribution of the initial position, summed up the change in a positive correlation between the initial position with the obvious changes in the length of the pipe, the pipe diameter and the inlet water superficial velocity, inverse relationship with changes in the inlet gas superficial velocity. 3 according to different inlet velocity distance elastic length distribution of the initial position at the same distance, and the pipeline at the different observing liquid projectile length distribution, the length of the drawn liquid bomb with inlet gas superficial velocity increases, 300D of the distribution of the length of the straight pipe length, any location within the pipeline at the liquid bomb requires at least approximate normal distribution with the entrance of water relative to the apparent speed decreases slug flow is fully developed, and the maximum liquid bombs average length of about liquid 2 times the length of the projectile conclusion.

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CLC: > Industrial Technology > General industrial technology > Engineering and basic science > Engineering Mechanics > Engineering Fluid Mechanics
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