基于质量守恒定律、动量守恒定律和能量守恒定律,建立埋地热油管道管内原油耦合流动方程,采用控制容积法,对热油管道停输后的自然对流进行了耦合求解,得到了管内典型流动洋相与等温线的变化,并对冬季停输状态下的管内原油自然对流的形成发展进行了求解,得到了直观的变化过程。 Based on the law of conservation of mass, the law of conservation of momentum and the law of conservation of energy, the coupled flow equation of crude oil in buried geothermal oil pipeline is established. By using the control volume method, the natural convection after the shutdown of hot oil pipeline is coupled and solved. And the change of isotherms, and solved the formation and development of the natural convection of crude oil in the pipeline under the shut-down condition in winter, and obtained an intuitive process of change.