Abstract: Due to the oilgaswater threephase flow is extremely complex, the threephase hybrid interface is weak of stability, different delivery conditions exist a variety of flow patterns. Using the VOF model simulation, the mock object was oilgaswater threephase flow in mutation tube, studying the fluid flow in pipe when the parameters(volume gas fraction, oil viscosity and velocity) was different, thus it gotten the corresponding phase distribution nephogram. Through analyzing the results showed that the gas volume fraction and velocity had great effect on mutiphase flow pattern. The effect of crude oil viscosity on flow patterns was not very obvious. The size of the pipe diameter also affected the flow pattern.

Key words: The mutation pipe, VOF model, Oilgaswater there phase flow, Model to simulate, Flow pattern

摘要： 油气水三相流动极其复杂, 三相之间的混合界面稳定性较弱, 因此在不同的输送条件下存在多种流型。使用 VOF模型, 以突变管段内油气水三相流为模拟对象, 在气体体积分数、 原油黏度及流动速度等参数不同的条件下, 对流体在管内的流动进行了模拟, 得到了相应的相分布云图。研究结果表明, 气体体积分数及流速对多相
流流型具有很大的影响, 而原油的黏度对流型的影响不是很明显。

关键词: 突变管段, VOF模型, 油气水三相流动, 模型模拟, 流型