基于离心法引发的气液两相环状流的数值模拟及流量测量研究

Gas-liquid Two-phase Annular Flow Numerical Simulation and Flow Rate Measurement Based on Centrifuge Method

用数值模拟方法研究了水平管内气液两相流经过旋流叶片这种离心原件的流动特点。入口为段塞流,空气为主相,水为次相。研究在离心力作用下给气液相分布和流型转变带来的影响。模拟结果表明段塞流经过离心原件后流型转变为环状流;且环状流的液膜相对比较均匀。实验引进了3D打印技术,试制了旋流叶片,并开展了气液两相流实验研究,采用多普勒流速仪测量,通过对液膜速度分布曲线积分即可获得液相质量流量。实验取得了良好的结果,误差基本都在10%以内。实现了管内相分离和流量的非介入式测量,为气液两相流计量提供了指导意义。

Using numerical simulation classify the flow features of gas-liquid flow induced by the swirl vane,the flow pattern is slug flow,air is the primary phase and water is the secondary phase. The effect of centrifugal force was investigated on distribution of gas and liquid phase and transition of flow pattern. Slug flow become annular flow pattern and the liquid film is inform. 3D printing technology was used to make the swirl vane and carry out the gasliquid two-phase flow experiments. Ultrasound Doppler velocimetry was used to measure the liquid mass flow rate.And the relative error were within 10%. Realized phase-isolation in the horizontal pipeline and non-invasive measure of mass flow rate,these have directived significance to gas-liquid two-phase metering.