摘要
由于列车散热使得铁路隧道内空气温度升高,隧道热环境的恶化对列车安全运行及隧道内设备的可靠性带来一定的影响,隧道内热环境的模拟研究对铁路发展具有重要意义。文章通过建立隧道内空气温度非稳态模拟计算模型进行分析,重点考虑了隧道围岩内渗流对空气温度的影响;采用有限体积法对方程进行离散,用Matlab工具编写隧道内空气温度模拟计算程序;分别在不同的渗流作用系数下,对单线铁路隧道内空气温度进行模拟计算。分析得出,渗流对隧道内空气温度具有较大的影响,在隧道内热环境模拟中,特别是对于中长期模拟计算中不能忽略渗流的影响作用。
Heat emission of passing trains raises the air temperatures in a tunnel which will deteriorate the safety operation of passing trains and the reliability of tunnel equipment.Thereupon the thermal environment simulation of tunnels is of great significance for the development of railways.A transient simulation model of air temperatures in a tunnel has been built in this paper with special consideration of the impact of the seepage water around the tunnel.Finite volume method was used when discreting the energy equations,a program for simulating air temperatures in a tunnel was compiled by using Matlab tool.For different coefficients of seepage,air temperatures in a single tunnel were simulated by using the program.The analysis revealed that seepages have great influence on air temperatures in the tunnel;the influence of seepages can not be ignored for the simulation of thermal environment in the tunnel,especially for long-term simulation.
出处
《现代隧道技术》
EI
北大核心
2011年第1期46-50,56,共6页
Modern Tunnelling Technology
基金
博士点基金(20090184110021)
国家自然科学基金面上项目(50978220)
关键词
铁路隧道
温度
渗流
模拟计算
Railway tunnel
Temperature
Seepage
Simulation calculation
