摘要
为了合理预测土壤温度变化,确定地铁环控系统冷热负荷,在考虑气固耦合传热、地下水渗流以及双洞温度场叠加等因素的基础上,提出了三维地铁隧道土壤温度预测模型.利用有限差分法对该模型进行数值离散,并采用Fortran语言编写求解程序.为了使网格划分方便,计算域采用适体坐标系、地下水运动方程以及传热方程在两套网格上进行离散差分,从而避开了适体坐标中插值的困难.利用建立的数值模型对假定条件下地铁土壤温度进行求解,分析了各种因素对土壤温度分布以及土壤吸热量变化的影响.实验结果表明,地下水热迁移以及双洞叠加效应对土壤温度均有较大影响,在地铁环控设计中应该考虑土壤蓄热作用.
In order to forecast reasonably the soil temperature and then determine the cooling and heating load of metro environment control system,the three-dimensional prediction model of soil temperature around metro tunnel was proposed with considering such factors as flow/structure coupled heat transfer,groundwater seepage,and superposition of double tunnel temperature field.The finite difference method was used for the numerical discretization of the model,and a solution program was written in FORTRAN language.The body-fitted coordinate system was used in the computational domain to divide the grids conveniently.The groundwater-motion equation and heat-transfer equation were applied in performing the discrete difference on two sets of grids to avoid the difficulty of interpolation in the body-fitted coordinate system.With the established numerical model,the soil temperature around the metro tunnel was solved under the assumed conditions,and the influence of various factors on the soil temperature distribution and soil heat absorption quantity was analyzed.The experimental results show that the water-heat transfer and double tunnel superposition effect have greater influence on the soil temperature.And the heat-storage effect of soil should be considered in the metro environment-control design.
出处
《沈阳工业大学学报》
EI
CAS
2011年第2期234-240,共7页
Journal of Shenyang University of Technology
基金
上海科委基金资助项目(07dz12022)
关键词
地铁隧道
气固耦合传热
地下水渗流
水热迁移
数值传热
地铁热环境
土壤温度
适体坐标系
metro tunnel； flow/structure coupled heat transfer； groundwater seepage； water-heat transfer； numerical heat transfer； metro thermal environment； soil temperature； body-fitted coordinate system；
