摘要
以竖直倾斜弯管内流动的天然气水合物浆液作为研究对象,运用Fluent软件进行数值模拟,并通过FBRM实验进行验证。主要研究了天然气水合物浆液在管道内流动、水合物颗粒体积分数的变化导致水合物颗粒不断聚集情况,因此研究了不同流速、不同管径对天然气水合物颗粒体积分数产生的影响,并对其影响稳定流动的情况进行分析。研究结果表明:低流速下,受到浮力的影响,水合物颗粒会在进入弯管前的直管段处在管道上方聚集,在弯管处体积分数达到峰值;管径不变的情况下,流速越低,弯管处水合物体积分数越大,聚集范围也越大;流速不变情况下,管径越大,水合物体积分数在整个流动过程中变化越剧烈,弯管处水合物体积分数越大,聚集的风险越高;模拟的结果与实验的误差约为11%。模拟结果能够对水合物浆液输送提供理论支持。
Taking natural gas hydrate slurry flowing in a vertically inclined elbow as a research object,numerical simulation was performed by using Fluent software,and simulation results were verified by FBRM experiments.The natural gas hydrate slurry flowing in the pipeline was mainly studied as well as the hydrate particles continuous accumulation caused by the change of the volume fraction of hydrate particles.Therefore,the effect of different flow rates and different pipe diameters on the volume fraction of natural gas hydrates was studied.The effect of the volume fraction of natural gas hydrates on the steady flow was also analyzed.The research results showed that:at low flow rates,under the effect of buoyancy,hydrate particles accumulated above the pipe at the straight pipe section before entering the bend,and the volume fraction peaked at the bend;When the pipe diameter was constant,the lower the flow rate,the larger the hydrate volume fraction at the bend,and the larger the range of aggregation;Under the same flow rate,the larger the pipe diameter,the more drastic the hydrate volume fraction change in the flow process,the larger the hydrate volume fraction at the bend,the higher the risk of aggregation;The error between the simulation result and the experiment result was about 11%.The simulation results can provide theoretical support for hydrate slurry transportation.
作者
杨蕊
刘德俊
王鹤超
YANG Rui;LIU De-jun;WANG He-chao(School of Petroleum and Natural Gas Engineering,Liaoning Shihua University,Fushun 113001,China;China Petroleum Pipeline Engineering Co.,Ltd.Southeast Asia Project Department,Langfang 065000,China)
出处
《当代化工》
CAS
2020年第11期2597-2601,共5页
Contemporary Chemical Industry
基金
辽宁省自然基金项目(项目编号:20180550370)
关键词
水合物浆
数值模拟
颗粒体积分数
竖直弯管
Hydrate slurry
Numerical simulation
Volume fraction of particles
Vertical elbow
作者简介
杨蕊(1992-),女,内蒙古自治区赤峰市人,在读硕士,研究方向:水合物浆液输送。E-mail:yr1020@sina.cn。
