深埋施工隧道非稳态传热与风流热工参数反演

doi:10.16265/j.cnki.issn1003-3033.2023.10.0024

中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (10): 167-175.doi: 10.16265/j.cnki.issn1003-3033.2023.10.0024

深埋施工隧道非稳态传热与风流热工参数反演

黄敏华¹(), 王海桥¹, 陈世强¹^,²^,^**(), 朱辉², 韩巧云¹, 刘东³

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

收稿日期:2023-04-20 修回日期:2023-07-25 出版日期:2023-11-24
通讯作者:
**陈世强(1978—),男,贵州遵义人,博士,教授,主要从事地下通风安全及其装备节能研究。E-mail: shiqiangchen@hnust.edu.cn。
作者简介:
黄敏华 (1992—),男,湖南郴州人,博士研究生,工程师,主要从事地下工程空气调节及热湿传递理论等方面的研究。E-mail: huangm_h@163.com。
王海桥教授
陈世强教授
朱辉教授
基金资助:
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)

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

HUANG Minhua¹(), WANG Haiqiao¹, CHEN Shiqiang¹^,²^,^**(), ZHU Hui², HAN Qiaoyun¹, LIU Dong³

¹ School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan Hunan 411201, China
² School of Building Environment and Energy Engineering, Guilin University of Aerospace Technology, Guilin Guangxi 541004, China
³ Guangxi Communications Investment Group Co., Ltd., Nanning Guangxi 530025, China

Received:2023-04-20 Revised:2023-07-25 Published:2023-11-24

摘要/Abstract

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。

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

Abstract:

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 duration τ>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.

Key words: deep buried construction tunnel, unsteady heat transfer, air flow, thermal parameter, temperature and humidity, thermal environment, heat and moisture transfer

黄敏华, 王海桥, 陈世强, 朱辉, 韩巧云, 刘东. 深埋施工隧道非稳态传热与风流热工参数反演[J]. 中国安全科学学报, 2023, 33(10): 167-175.

HUANG Minhua, WANG Haiqiao, CHEN Shiqiang, ZHU Hui, HAN Qiaoyun, LIU Dong. Thermal parameter inversion of unsteady heat transfer and air flow in deep buried construction tunnel[J]. China Safety Science Journal, 2023, 33(10): 167-175.

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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 and air flow in deep buried construction tunnel

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