热油在不同孔隙度土壤中泄漏的温度场模拟  

Simulation of Temperature Field in the Soil With Different Porosities During Hot Oil Leakage

作　　者：史俊杰[1] 王岳[1] 马跃[1] 曹燕龙[1] 石龙[1] 

机构地区：[1]辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001

出　　处：《当代化工》2013年第1期66-69,共4页Contemporary Chemical Industry

基　　金：辽宁省自然科学基金资助项目(20082186)

摘　　要：针对热油在孔隙度不同的土壤中发生泄漏问题,利用CFD仿真模拟软件,建立土壤多孔介质的流固耦合的相变数学模型。模拟结果表明:泄漏前,管道周向温度场等温线呈现出扁圆形分布,热影响区温度由内到外依次降低,且不随土壤孔隙度的大小变化而影响管道周边的温度场分布;泄漏后,由于土壤孔隙度不同,热油在土壤中的扩散趋势和范围明显不同,以致土壤中热影响区域变化迥异。小孔隙度情况下,毛细作用占主导,渗透力较小区域会随着时间推移由周边区域弥补,最终发散现象不太明显;相比在大孔隙度下,毛细作用不明显,热油更易寻找阻力较小通道,加之后续热油推挤,随着时间延续发散现象愈加明显,等温线图愈加不规则。In view of the problem of hot oil leakage in the soil with various porosities,phase transition mathematical model of fluid-structure interaction in the soil as a kind of porous media was established by popular CFD simulation software.Simulation results show that： before leak,the oblate isothermal line distribution appears around the pipeline,the temperature decreases successively from interior to exterior,the soil porosity can＇t affect the temperature field of pipe surrounding.After leak,trends and scopes of the effect at the same time are various due to the difference of soil porosity.When the porosity is small,the effect is dominated by the capillarity,the dispersion phenomenon isn＇t obvious;In contrast,when porosity is bigger,the capillary effect is not obvious,but hot oil easily flows in the channel with little resistance by pushing of subsequent hot oil,so the dispersion phenomenon is more and more obvious along with time,and the isotherm figure is more irregular.

关 键 词：泄漏 土壤颗粒 模拟 多孔介质 等温线 

分 类 号：TE832[石油与天然气工程—油气储运工程]