Abstract: Soil temperature field changed periodically during seasons. During the long distance hot oil pipeline operation period, the pipeline operating properties would change under different soil temperature field. When setting the outlet oil temperature, Newtonian fluid, nonnewtonian fluid length and inlet oil temperature would change with different oil temperature. By aimulating the interactive temperature field between hot oil pipeline and soil temperature field how heat transfer from oil pipeline to soil was analyzed. By setting up mathematical model the change of hot oil fluid state and inlet oil temperature under different soil temperature fields was analyzed. According to the calculation results, the piping system operation conditions to realize the whole optimization could adjusted, this could also provide theoretical basis for oil transportation scheme.

Key words: Soil temperature field , Hot oil fluid state , Simulating , Mathematical model ,  Oil pipeline

摘要： 土壤温度场随季节呈周期性变化,在长输热油管道运行周期内,不同土壤温度场下的管道运行工况
不同。当设定出站油温时,管内牛顿流体、非牛顿流体油流长度及进站油温均随土壤温度发生变化。模拟热油管道
与周围土壤相互作用下的复合温度场,分析了管道在不同土壤温度场下的散热情况,建立数学模型并分析了不同土
壤温度场的管内热油流态分布及进站温度的变化。依据计算结果,调整出站油温可实现整体优化,为输油管道运行
投产提供理论依据。

关键词: 土壤温度场 , 热油流态 , 模拟 , 暋数学模型 , 输油管道