基于OpenFOAM的竖直管内气-液-水合物流动特性研究  

Investigation of Gas-Liquid-Hydrate Flow Characteristics in Vertical Pipe Based on OpenFOAM

作　　者：周洪利 王春生[1] ZHOU Hong-li;WANG Chun-sheng(School of Petroleum Engineering,Northeast Petroleum University)

机构地区：[1]东北石油大学石油工程学院

出　　处：《化工机械》2023年第1期67-75,共9页Chemical Engineering & Machinery

基　　金：国家自然科学基金项目(21076043)。

摘　　要：针对天然气水合物开采过程中涉及的复杂气液固三相流动问题,基于群体平衡模型,提出了新的水合物颗粒聚并破碎模型组合,同时考虑了气泡的聚并破碎行为,运用开源CFD软件OpenFOAM对建立的模型进行求解验证。考察了入口流速、气相和水合物颗粒体积分数对竖直管内气-液-水合物流动特性的影响。结果表明:所建立的模型准确有效,各相的浓度分布、气泡的平均粒径径向分布和水合物颗粒平均粒径大小受水合物颗粒体积分数的影响很大,压力损失梯度随着流速的增加先减小后增大,存在特定工况下的最优流速,气相体积分数的增加会让管内流体的压力损失梯度明显减小。Aiming at the complicated gas-liquid-solid flow involved in the exploitation of natural gas hydrate, a new combination of hydrate particle coalescation-breakage model was proposed based on the population balance model and the coalescation-breakage behavior of bubbles was considered. The model was solved and verified with OpenFOAM in the CFD software, including the investigation of the effects of inlet velocity, gas phase and hydrate particle volume fraction on gas-liquid-hydrate flow characteristics in vertical tubes. The results show, the established model is accurate and effective, and the concentration distribution of each phase, the radial distribution of the average particle size of bubbles and the average particle size of hydrate particles are most affected by the volume fraction of hydrate particles. The pressure loss gradient decreases first and then increases with the increase of the flow rate, and there is an optimal flow rate under certain conditions. With the increase of gas volume fraction, the pressure loss gradient decreases obviously.

关 键 词：天然气水合物 竖直管 多相流 群体平衡模型 OPENFOAM 

分 类 号：TE311[石油与天然气工程—油气田开发工程]