Abstract: It is very important to forecast the heat drop of the crude oil in the pipeline and the change of soil temperature field around underground pipeline for majoring pipeline construction and drawing up science and reasonable crude oil transportation craft. For increasing the accuracy of estimate, the various influencing factor of outside pipeline environment and inside pipeline oil temperature etc was considered. The drop of the crude oil in the pipeline and the temperature field of soil around different embedded depth pipeline in the process of hot crude oil transportation was numerically simulated by using heat transfer model with finite elements method, the drop of the oil in the pipeline and the soil temperature distributions around pipeline at different time were obtained in different embedded depth. Through the calculation results, different embedded depth of underground pipeline and oil-line time influence inside pipeline oil temperature. When majoring pipeline construction and drawing up the craft of hot crude oil transportation, the effect should be considered.

Key words: Underground pipeline , Heat drop , Soil temperature field , Numerical simulation

摘要： 优化管道建设和制定科学合理的热油输送工艺,需要准确预测埋地热油管道运行过程中管内油品温
降和土壤温度场变化情况。提高预测的准确性,在计算过程中要充分考虑管外环境和管内油品温度等多种因素的
影响。用有限元法对不同埋深的热油管道输送过程中管内油品温降和土壤温度场进行了数值计算,得出了不同埋
深管道在不同时刻管内油品温度变化和管道周围土壤温度的分布情况。通过对计算结果分析表明,管道埋深、输油
时间等对管内油品温度变化有很大影响,优化管道建设和制定科学合理的热油输送工艺要充分考虑其影响。

关键词: 埋地热油管道 , 温降 , 土壤温度场 , 数值模拟