摘要
为研究不同位置裂隙水流-传热对高放废物处置库近场温度的影响,采用3DEC建立数值模型,分析位于巷道上方远处和近处单裂隙水流,以及位于巷道上、下方近处两裂隙水流对处置库近场温度分布的影响.结果发现:裂隙水流传热对处置库近场温度分布的影响显著,裂隙水流吸热降温以及传热作用使膨润土温度比裂隙水静止时低;裂隙水流离巷道越近,对热量向其另一侧岩体传导的阻滞能力越强,致使裂隙水流上游和下游区域的传热面积越大,并且裂隙水流吸热降温以及传热作用越强,膨润土温度比远裂隙时低;巷道下方增加裂隙水流后,两条裂隙水流对热量向其两侧岩体传导的阻滞能力进一步增强,致使裂隙水流上游和下游区域的传热面积进一步增大,膨润土温度比单裂隙时高;裂隙水流距巷道由远及近,导致裂隙水的最高温分布由上游区域发展到下游区域,而巷道下部裂隙水流对巷道上部裂隙水温影响较小.
In order to study the influence of fracture water flow and heat transfer at different locations on the near-field temperature of the HLW,the 3DEC numerical model was used to simulate the influence of single fracture water flow far from and near above the roadway,and that of dou ble fracture water flow near the roadway on the near-field temperature of the HLW.The results show:Fracture water flow and heat transfer have significant influences on the near-field temperature of the HLW.Since the fracture water flow could absorb heat,leading to cooling and heat transfer,the temperature of the bentonite is lower than that when the fracture water is still.The closer the fracture water is to the roadway,the stronger the resistance to heat transfer to the rock mass on the other side is,resulting in larger heat transfer area in the upstream and downstream areas of the fracture water flow.Besides,the stronger the heat absorption and cooling effect are,the bentonite temperature is far more lower than that when the fracture is far away.After the fracture water flow is increased below the roadway,the blocking ability of the double fracture water flow to heat conduction to the rock mass on both sides of the roadway is further enhanced,which broaden the heat transfer area in the upstream and downstream areas of the fracture water flow,and makes the bentonite temperature higher than that when there is just single fracture.When the fracture water flows far to near to the roadway,the highest temperature of fracture water move from the upstream area to the downstream area;The fracture water flow in the lower part of the roadway has little influence on the fracture water temperature in the upper part of the roadway.
作者
高俊义
项彦勇
吴乔
杨红霞
GAO Junyi;XIANG Yanyong;WU Qiao;YANG Hongxia(School of Architecture and Civil Engineering,Yan'an Shanxi 716000,China;Network Information Center,Yan’an University,Yan’an Shanxi 716000,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2019年第4期37-44,共8页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
延安大学博士科研启动项目(YDBK2018-08）
高等学校博士学科点专项科研基金(20120009110022)~~
关键词
高放废物处置库
不同位置裂隙
水流-传热
数值分析
high level radioactive waste repository
fracture at different location
water flow and heat transfer
numerical analysis
