深埋施工隧道非稳态传热与风流热工参数反演  

Thermal parameter inversion of unsteady heat transfer andair flow in deep buried construction tunnel

作　　者：黄敏华 王海桥 陈世强 朱辉[2] 韩巧云 刘东 HUANG Minhua;WANG Haiqiao;CHEN Shiqiang;ZHU Hui;HAN Qiaoyun;LIU Dong(School of Resource,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China;School of Building Environment and Energy Engineering,Guilin University of Aerospace Technology,Guilin Guangxi 541004,China;Guangxi Communications Investment Group Co.,Ltd.,Nanning Guangxi 530025,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]桂林航天工业学院能源与建筑环境学院,广西桂林541004 [3]广西交通投资集团有限公司,广西南宁530025

出　　处：《中国安全科学学报》2023年第10期167-175,共9页China Safety Science Journal

基　　金：国家自然科学基金资助(42202321);湖南省自然科学基金资助(2023JJ50106);交通运输部交通运输行业重点科技项目(2021-MS5-126);湖南省研究生科研创新项目立项(CX20231053)。

摘　　要：为改善深埋施工隧道热环境,掌握风流流经隧道过程中的热湿变化规律,采取现场实测与理论推导的方法,构建风流-围岩非稳态传热模型,依托现场实测数据对模型进行验证;基于上述理论模型,数值反演通风参数,量化通风时长、断面风速、送风温湿度对隧道环境温湿度和综合换热系数(CHTC)的影响规律,得到有效通风降温临界时间和断面临界风速。研究结果表明:当通风时长τ大于900 h时,CHTC不随通风时长的变化而变化,在该通风时域内通风不能达到降温效果;当断面风速u小于0.22 m/s时,等温线和等相对湿度线密集,在此流速区间内,气流温度梯度和湿度梯度变化显著,温差和浓度差引起的热湿传递较强,此时增大送风量,有利于降低隧道环境温湿度。In order to improve the thermal environment of the deep-buried tunnels,and master the thermal and humidity variation law during the flow of air through the tunnel,the unsteady heat transfer model of air flow and surrounding rock was constructed by the method of field measurement and theoretical deduction,and the model was verified by the field measurement data.Based on the above theoretical model,the influences of ventilation duration,wind speed in the tunnel section and supply air temperature and humidity on the ambient temperature and humidity of the tunnel and the comprehensive heat transfer coefficient(CHTC)were quantified,and the critical time of effective ventilation and cooling and section critical wind speed were obtained by numerical inversion.The results show that when the ventilation durationτ>900 h,the CHTC does not change with the ventilation time;it indicates that the cooling effect cannot be achieved in the ventilation time domain.In the range of u<0.22 m/s,isotherm and isolative humidity line are dense,indicating that the temperature gradient and humidity gradient of the airflow change significantly in this flow velocity section,and the heat and humidity transfer caused by temperature difference and concentration difference is strong.At this time,increasing the air supply volume is conducive to reducing the ambient temperature and humidity of the tunnel.The research results provide an important theoretical basis for the ventilation and cooling of deep-buried construction tunnels.

关 键 词：深埋施工隧道 非稳态传热 风流 热工参数 温湿度 热环境 热湿传递 

分 类 号：X951[环境科学与工程—安全科学]