关键词: F l u e n t数值模拟,    ,  , 安全停输,    ,  , 径向温降

Abstract: The temperature drop in submarine oil pipeline during shutdown was simulated using Fluent software．The results show that the temperature drop is very quickly after the pipeline shutdown 0~20 h, mainly because the nature convection in the pipeline of the crude oil is relatively strong; the temperature drop becomes slowly after shutdown for 20 hours, which is less than 5 ℃, that’s because the temperature of the crude oil is close to the critical temperature, the viscosity of the crude oil increases and the wax crystal separates out, which reduces the intensity of natural convection. The initial temperature in oil pipeline and sea temperature have great effect on the temperature drop.

Key words: Fluent numerical simulation,    ,  Safe shutdown,    ,  Shutdown temperature drop