变工艺水合物粒子浓度对两区影响的仿真研究

Influence of Hydrate Particle Concentration to Two Regions in Variable Transmission Process

在石油输油工艺设计优化问题的研究中,输油工艺的选取和水合物颗粒浓度对漩涡区、低速区的影响问题,影响输油工业的安全,必须加以研究。实验中水合物的生成温度和压力波动难以控制。传统的Langrian计算方法对计算颗粒的数量受到限制,阻碍了颗粒浓度与两区关系的研究。针对上述问题,提出采用CFD软件FLUENT,应用以颗粒动力学为基础的Euler-Euler模型对石油工业T形管内,不同集输方式、不同颗粒浓度的油品-水合物流动仿真计算。得到了漩涡区、低速区随集输工艺和颗粒浓度的变化规律,以及两区的分布情况,并对仿真结果进行分析。结果表明,计算所得流场符合管道内浆液流动规律,较好地仿真了两区随颗粒浓度变化,可以为工艺的选取和管道位置的保护提供依据和指导。

Study the optimization of oil transportation and the effect of hydrate particle concentration on vortex or low velocity zone which affects the oil industry safety. We used an Euler- Euler model based on particle dynamics under the stable premise and obtained the characteristics of two zones with different gathering processes when particle concentrations changes. The results indicate that the computational results conform the rules of slurry flow, and well simulated the characteristics of hydrate slurry. It can offer some reference for the shape design of gathering pipe and the protection points on the pipe.