摘要
针对冷热原油顺序输送工艺,在已有混油理论基础上,建立冷热原油顺序输送混油计算的数学模型,采用有限容积法进行数值求解,并对竖直弯管内的混油特性进行分析研究。结果表明:重力作用方向与管道轴向的角度变化及流速分布变化是影响竖直弯管内混油特性的主要因素;在水平管段,重力方向与管道轴向垂直,导致混油浓度在径向分布不对称,而在竖直管段,重力方向与管道径向垂直,密度大的油品在上方时,混油量相对较大;在弯头及其后面直管内流速分布发生较大变化,高速区发生偏移,致使混油增强,混油前峰形状发生变化并且后行油品在径向的高含量区发生偏移。
According to the process of batch pipelining of cold and hot crude oils,a mathematical model for contaminated oil of batch pipelining of cold and hot crude oils was established based on current contamination theory.And the mathematical model was numerically solved by finite volume method.The characteristics of contaminated oil in vertical bend pipe were numerically simulated and analyzed.The results show that the change of the angle between gravity direction and pipe＇s axial direction and the change of velocity distribution are the main factors influencing the characteristics of contaminated oil in vertical bend pipe.In horizontal straight pipe section,gravity direction is vertical to axial direction,which leads to the asymmetric distribution of contaminated concentration in the radial direction.While in vertical pipe section,gravity direction is vertical to radial direction and the contaminated oil volume is relatively large when the heavy oil is on the upper side.At bend and in the straight pipe after the bend,velocity distribution changes a lot and the high velocity area migrates.It leads to more contaminated oil,and the change of the shape of contaminated oil front and the migration of high concentration of posterior oil in the radial direction.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第3期125-129,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
辽宁省教育厅项目(2009R37)
关键词
冷热原油顺序输送
混油
弯管
有限容积法
数值模拟
batch pipelining of cold and hot crude oils
contaminated oil
bend pipe
finite volume method
numerical simulation
