【摘要】 基于启动波速理论提出一种新的胶凝原油管道启动模型。该模型用于模拟胶凝原油管道初始启动过程中的压力和流量变化,最终给出管道的启动压力及启动时间。结果表明:随着启动波前锋的推进,管道入口流量逐渐减小,管道沿线的压力逐渐增长,但由于启动波前锋上游管段内凝油结构的裂解,管道沿线的压力梯度逐渐趋于平缓。管道内径越大,启动压力越小,启动时间越短;管道壁厚越大,启动压力越大,启动时间越短。受管道弹性及凝油可压缩性的影响,胶凝原油管道的启动压力远小于4(τy0+τy1)L/D。更多还原

【Abstract】 A new start-up model of pipeline for compressible gelled crude oil was put forward based on the start-up wave velocity.This model can be conveniently used to simulate the initial transient pressure and flow rate during the start-up of pipeline applying centrifugal pump,and finally predict the start-up pressure and time.The results show that with the advancement of start-up wave front,the flow rate at pipeline inlet gradually declines,and the pressure along pipeline gradually increases.Because of the breakdown of upstream gel structure of the start-up wave front,the pressure gradient along pipeline tends to be gentle.With the increase of inside diameter,the start-up pressure and time of pipeline decrease.With the increase of wall thickness,the start-up pressure of pipeline increases,yet the start-up time decreases.Thanks to the elasticity of pipeline and the compressibility of gelled crude oil,the start-up pressure is far lower than 4(τy0+ τy1) L/D.更多还原