空间科学学报2012，Vol.32Issue(3)：383-390,8.
不同重力条件下水平管内气液两相流流型及空隙率分布的数值模拟
Numerical Study on Flow Patterns and Void Fraction Distribution in Gas-liquid Two-phase Flow in Horizontal Pipe Under Different Gravities
摘要
Abstract
Based on the VOF（Volume of Fluid） method,a three-dimensional unsteady mathematical model is developed to study the gas-liquid two-phase flow in horizontal pipe under different gravities of 10^-4 go,0.17go,0.38 go and 1 go（go = 9.8m·s^-2）.The flow patterns and their transitions are numerically investigated by the developed model and the void fraction distribution and oscillation are presented.The results indicate that the characteristics,such as flow patterns,void fraction,and slip ratio,of gas-liquid two-phase flow under different gravities can be well predicted by the developed model.Under the same two-phase superficial velocity,the gas phase accumulates and coalescences in the upper part of horizontal pipe with increasing gravity,resulting in the transition of flow patterns. In addition,with increasing gravity,the slip ratio increases while the peak and frequency of section void fraction oscillation decrease.However,due to that the increasing two-phase superficial velocity enhances the inertia force of two-phase flow,the gravity effects are weakened.关键词
气液两相流/不同重力条件/流型/空隙率/滑速比/VOFKey words
Gas-liquid two phase flow/Different gravity/Flow pattern/Void fraction/Slip ratio/VOF(Volume of Fluid)分类
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刘向东,陈永平,张程宾,施明恒,郝英立..不同重力条件下水平管内气液两相流流型及空隙率分布的数值模拟[J].空间科学学报,2012,32(3):383-390,8.基金项目
高等学校博士学科点专项科研基金资助 （）
