集输管道油气水三相流型识别数值模拟

油气水三相介质具有的不同物理化学性质,使得其混合物在时间和空间上存在一个相态与分布均不确定的混合界面。采用多相流VOF模型研究了集输管道内油气水三相混输过程,并对其流型进行识别,通过研究初始含气率对流型的影响,得到工程实际中常见的泡状流和塞状流,进而分析了流速对泡状流中气泡分布的影响。结果表明：对于泡状流,气泡的分布与液体流速直接相关,流速越低,气泡的分布越不均匀;模拟结果与相关理论吻合较好,可为工程实际提供一定的理论指导。

Numerical simulation of three-phase flow patterns identification of oil-gas-water in gathering pipeline

Three-phase medium of oil-gas-water has different physical and chemical properties, the mixture from it produces a mixing interface with uncertain phase states and distribution in time and space. This paper studies the oil-gas-water three phase blending process within pipe by means of VOF model and identifies its flow pattern. The impact of initial GVF on flow pattern is researched and the bubble flow and plug flow, common in engineering practice, are found, and further, the impact of flow velocity on bubbles in bubble flow is analyzes. The results show that as for bubble flow, the distribution of bubbles has direct relation with liquid velocity, the lower the flow velocity is, the more uneven the distribution of bubbles is. Simulation results are well fitted with related results, which can provide a certain theoretical guidance to engineering practice.