Abstract: In batch transportation of finished oil products, mixed oil would be produced by adjacent batch oil. The cases of 30°, 45°,60° or 90° for the joint line of the variable diameter part and the straight pipe of the variable diameter pipe were calculated by the CFD software. The conclusion show the relationship and the change law between the angle of the joint of the variable diameter part and the length were researched. The results show that with the angle increased, the mixed oil segment length decreased in the sudden expansion pipe and the opposite conclusion in the reducer, which was coincided with engineering basic phenomenon.

Key words: Batch transportation of products, Mixed oil, CFD software, Simulation calculation, Variable diameter pipe

摘要： 在进行成品油顺序输送时,相邻批次的油品会产生一定量的混油。通过CFD软件,针对变径管变径
部分连接线与直管段的角度分别为30°、45°、60°、90°的几种情况进行模拟计算,研究了变径管变径部分连接线与直
管段的角度与混油段长度的关系及变化规律。结果表明,使用突扩管时,随着变径管变径部分连接线与直管段角度
的增加混油段长度在逐渐减小;使用渐缩管时,随着变径管变径部分连接线与直管段角度的增加混油段长度在逐渐
变长。这一结果与工程现象基本吻合。

关键词: 成品油顺序输送 ,  , 混油 , CFD软件 , 模拟计算 , 变径管