水平管内气液两相流中气泡滑移速度的数值模拟

Numerical Simulation of Bubble Slip Velocity in Gas-Liquid Two-Phase Flow Within Horizontal Pipe

基于多相流Euler模型,采用Fluent软件对水平管道内的气液两相流进行数值模拟,在水和气体初始速度相同的情况下,考察气泡直径、气泡体积分数和流体流速对气泡滑移速度的影响。模拟结果表明,气泡直径、气泡体积分数和流体流速对气泡滑移速度都有影响,其中流体流速的影响较大;在气泡直径小于等于0.10 mm,或气泡体积分数大于等于10%,或流体流速大于等于0.10 m/s时,对气泡滑移速度的影响可忽略;与水和气泡的速度相比,气泡滑移速度很小,可忽略不计。

Based on Euler model, gas-liquid two-phase flow in horizontal pipe was numerically simulated by using Fluent software. Under the same initial velocities of the gas and the liquid, the effects of the bubble diameter, the bubble volume fraction and the fluid velocity on the bubble slip velocity were investigated. The simulation results showed that all the three factors had effects on the bubble slip velocity, among which that of the fluid velocity was the greatest. Under the condition of the bubble diameters less than 0. 10 mm or the bubble volume fraction more than 10% or the fluid velocity more than 0.10 m/s, the bubble slip velocity might be ignored. In relation to the velocities of the water and the gas, the bubble slip velocity was very small and might be ignored.