西安石油大学学报（自然科学版）2011，Vol.26Issue(6)：66-69,82,5.
饱和含水冻土区埋地管道水热耦合数值模拟
摘要
Abstract
When the crude oil pipeline creeses frozen soil area,the thawing of the frozen soil results in the heterogeneous deformation of the pipeline foundation and influences the pipeline security. The water-thermal coupling model for porous frozen-soil media was established by finite volume method,and SIMPLER algorithm is used to solve this model. In the model,the surface temperature varies periodically in every year. The temperature fields in the soil around crude oil pipelines without any thermal insulation layer and with two kinds of thermal insulation layers of the same thickness of different materials in spring, summer and winter are simulated. The results show that the heat flux density in the frozen soil also varies periodically with the fluctuation of soil temperature. In the running process of the pipeline,the frozen soil around the pipeline without thermal insulation layer thaws dramatically,in which there is a great heat flux density with great amplitude fluctuation. Among two kinds of thermal insulation material layers of 40 mm thickness, polyurethane foam insulation layer has preferable thermal insulation performance. Therefore,the crude oil pipeline in the permafrost region should overlay with the thermal insulation material of small thermal conductivity coefficient,which can greatly reduce the thawing depth and ensure the security of pipeline running.关键词
冻土区:埋地管道/保温层/水热耦合/数值模拟Key words
frozen soil area/buried oil pipeline/thermal insulation layer/water-thermal coupling/numerical simulation分类
能源科技引用本文复制引用
付俊鹏,马贵阳..饱和含水冻土区埋地管道水热耦合数值模拟[J].西安石油大学学报（自然科学版）,2011,26(6):66-69,82,5.基金项目
辽宁省自然科学基金项目"冻土区埋地管道周围土壤水热力耦合问题研究"(编号:20082186) （编号:20082186）
