摘要
为了探究高温高湿铁路隧道围岩与内部风流的换热本质,设计搭建了模拟隧道实验平台,并利用模拟软件基于相似理论建立了隧道内通风传热模型。在数值模拟与实验模拟结果吻合的基础上,分析了干燥与含裂隙多孔潮湿隧道内原岩温度、入口风流温度、入口风流速度对不稳定换热系数和换热量的影响。结果表明:含裂隙多孔潮湿围岩的不稳定换热系数随着入口风流温度的升高、入口风流速度的增大及原岩温度的升高而增大;干燥围岩不稳定换热系数几乎不受原岩温度和入口风流温度的影响,随着入口风流速度的增大而增大;在其他参数相同的情况下,含裂隙多孔潮湿围岩的不稳定换热系数和换热量比干燥围岩大,故在对含裂隙铁路隧道内环境进行研究时,必须考虑裂隙水、渗流水的影响。
In order to explore the heat transfer essence between the surrounding rock and the internal airflow in the high-temperature and high-humidity railway tunnels,an experimental platform for simulated tunnels is designed and built,and a ventilation and heat transfer model in the tunnel is established according to the similarity theory by using simulation software.Based on the consistency between the numerical simulation results and the experimental simulation results,the effects of the virgin rock temperature,inlet airflow temperature and velocity on the unstable heat transfer coefficient and heat transfer in the dry tunnels and the fractured porous and humid tunnels are analysed.The results show that the unstable heat transfer coefficient of fractured porous and humid surrounding rocks increases with the increase of inlet airflow temperature and velocity,and virgin rock temperature.The unstable heat transfer coefficient of dry surrounding rocks is almost not affected by the virgin rock temperature and inlet airflow temperature,and increases with the increase of inlet airflow velocity.When other parameters are the same,the unstable heat transfer coefficient and heat transfer of fractured porous and humid surrounding rocks are greater than those of dry surrounding rocks.Therefore,when studying the environment of fractured railway tunnels,the influence of fracture water and seepage water must be considered.
作者
冯国会
杨州
孙佳琳
黄凯良
任师萱
Feng Guohui;Yang Zhou;Sun Jialin;Huang Kailiang;Ren Shixuan(Shenyang Jianzhu University,Shenyang)
出处
《暖通空调》
2026年第1期180-186,共7页
Heating Ventilating & Air Conditioning
基金
国家自然科学基金重点项目(编号:52038009)。
关键词
高温高湿隧道
铁路
裂隙水
风流
多孔潮湿围岩
不稳定换热系数
换热量
隧道通风
high-temperature and high-humidity tunnel
railway
fracture water
airflow
porous and humid surrounding rock
unstable heat transfer coefficient
heat transfer
tunnel ventilation
