输油管道弯管固液两相流流动特性数值模拟

Simulation on the flowing characteristics of solid-liquid two-phase flow in bends of oil pipeline

为了除去输油管道弯管低洼处的泥沙颗粒杂质,利用Fluent进行数值模拟,研究油流流速、弯管上倾角、颗粒粒径对泥沙颗粒运动规律的影响,利用Origin对模拟数据进行拟合处理,分别得到油流流速、颗粒粒径、弯管上倾角与压力梯度的函数关系式。结果表明:随着油流流速增快、弯管上倾角增大、颗粒粒径减小,管道压力梯度增大;油流流速与压力梯度的函数关系式斜率最大,说明油流流速对弯管压力梯度的影响最大。此外,对上倾角与压力梯度、颗粒层迁移速度之间的关系进行了分析,在所研究的模拟工况下,应选取小于30°的弯管上倾角。(图4,参25)

In order to eliminate sediment particles at the low point of the bend of oil pipeline,numerical simulation was conducted by Fluent to study the effects of oil flowing velocity,bend’s updip angle and particle size on the movement laws of sediment particles.Then,the simulation data was fitted by Origin,and the function relations of oil flowing velocity,bend’s updip angle and particle size to pressure gradient were established.It is shown that the pressure gradient of pipeline increases with the increase of oil flowing velocity and updip angle and the decrease of particle size.The slope of the function relation between oil flowing velocity and pressure gradient is the biggest,so the effect of oil flowing velocity on bend’s pressure gradient is the greatest.Finally,the relationships of updip angle vs.pressure gradient and particle moving speed were analyzed.It is recommended to set the bend’s updip angle less than 30°under the simulated conditions of this study.(4 Figures,25 References)