管道CCl_3F水合物浆流动特性的数值模拟  

Numerical simulation on flow behaviors of CCl_3F hydrate slurry in pipelines

作　　者：魏丁[1] 王武昌[1] 李玉星[1] 赵鹏飞[1] 宋光春[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院

出　　处：《油气储运》2016年第8期828-832,共5页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金资助项目"水合物颗粒聚集动力学及流动安全研究";51006120;高等学校博士学科点专项科研基金资助项目"天然气水合物生长动力学及快速形成机理研究";20110133110004

摘　　要：为了研究CCl_3F(R11)水合物浆在水平管内的流动特性,建立了CFD/Fluent数值模型。对比模拟得到的压降与实验压降可知,相对误差均在20%以内,表明该模型可行。通过模拟分析管内水合物颗粒流动特性发现,控制流速可以有效防止水合物阻塞。同时,深入模拟研究了R11水合物颗粒在管内流动的沉积特性,结果表明:流速对R11水合物的沉积特性影响较大,当平均流速达到一定值时,水合物颗粒体积分数对其沉积特性影响不大,将该流速视为管道安全运行的最小流速。通过分析水合物浆的其他关键参数(颗粒密度、颗粒粒径及管径)对管道安全运行最小流速的影响,得出水合物颗粒粒径对管道安全运行最小流速的影响较大,水合物颗粒密度及管径对管道安全运行最小流速的影响较小。In this paper, a CFD/Fluent model was established to simulate the flow behaviors of CCI3F （R11） hydrate slurry in horizontal pipelines. The simulated pressure drop is in good agreement with the experimental data, with relative errors less than 20%. Simulation analysis was performed on the flow behaviors of hydrate particles inside pipelines, and the results indicated that hydrate plugs could be avoided effectively by controlling the flow velocity. And based on simulation, the deposition characteristics of R11 hydrate particles are more influenced by flow velocity. When the mean velocity reaches a certain value, the deposition characteristics of hydrate particles are little impacted by their volume fraction, and the mean velocity is defined as the minimum flow velocity for safe operation of pipelines. The effect of other key parameters of hydrate slurry on the minimum flow velocity was also investigated, including particle density and diameter, and pipe diameter. Results show that the minimum flow velocity is more affected by the hydrate particle diameter, but less by the hydrate particle density and the pipe diameter. （8 Figures, 3 Tables, 10 References）

关 键 词：CCl3F(R11)水合物浆 CFD/Fluent 数值模拟 流动特性 沉积特性 

分 类 号：TE832[石油与天然气工程—油气储运工程]