湿天然气在上倾管道的气液两相流动特性研究

Study on Gas-Liquid Two-Phase Flow Characteristics of Wet Natural Gas in Uplift Section

利用VOF (Volume of Fluid)模型模拟了湿天然气在上倾管道的气液两相流动特性。讨论了管道内气体入口流速对气液两相流动特性的影响。结果表明,当管道内气体入口流速较低时,由于气液界面的切应力小于液相在上倾段的重力分力,因此气体无法将液体携带至管道上倾段。随着气速的增加,气液界面的切应力逐渐增大,气液界面开始出现波纹,气体逐渐将液体携带并完全平铺于管道上倾段。

In this paper, the VOF( Volume of Fluid) model is used to simulate the gas-liquid two-phase flow characteristics of wet natural gas in uplift of pipelines. The influence of gas inlet velocity on the flow characteristics of gas-liquid two-phase flow is discussed. The results show that when the gas inlet velocity in the pipeline is low, the shear stress at the gas-liquid interface is less than the gravity component of the liquid phase at the uplift of pipelines, so the gas cannot carry the liquid to the uplift of pipelines. With the increase of gas velocity, the shear stress at the gas-liquid interface gradually increases, and ripples begin to appear at the gas-liquid interface.