摘要
冻土区埋地管道遇到的最常见问题是冻害破坏,研究埋地管道发生冻害及其科学有效的防止方法,首先应预测埋地管道周围冻土冻融过程中温度场的变化及温度场与水分场的变化关系。用有限单元法对埋地管道周围温度场进行了数值模拟,计算中考虑了土壤中水分迁移和相变对温度的影响,给出了不同时刻埋地管道周围温度分布。对计算结果分析表明,水分迁移和相变对土壤的传热有一定影响。
A freezing damage is a common problem that pipelines is buried in frozen underground area encounter. To study freezing damage and take scientific and effective measures to prevent freezing damage, it is necessary to predict the changes of the temperature field of frozen soils around underground pipelines in the frozen-thaw process, and the change relationship between the temperature field and moisture field. The temperature field of the soils around underground pipelines was numerically simulated by using finite elements method. The influence of moisture transfer and phase change on temperature was taken into consideration. The temperature distributions of the soils around pipeline at different time were given, and the results were analyzed. The results show that the moisture transfer and the phase change have definite effects on heat transfer of the soils, which should be considered in calculation.
出处
《辽宁石油化工大学学报》
CAS
2007年第1期40-43,46,共5页
Journal of Liaoning Petrochemical University
关键词
冻土
埋地管道
水分迁移
相变
数值模拟
Frozen ground, Underground pipelines, Moisture transfer
Phase change
Numerical simulation
