高海拔特长铁路隧道火灾烟气分布特性数值模拟研究  

Numerical Simulation Study on Smoke Distribution of Fire in High-altitude Super-long Railway Tunnels

作　　者：张念[1,2] 谭忠盛[2] 

机构地区：[1]太原科技大学交通与物流学院,山西太原030024 [2]北京交通大学土木建筑工程学院

出　　处：《中国安全科学学报》2013年第6期52-57,共6页China Safety Science Journal

基　　金：太原科技大学博士科研启动基金资助(20122040);铁道部科技研究开发计划重点课题项目(KCD09002531)

摘　　要：海拔对火灾的燃烧有重要影响,为得到高海拔特长铁路隧道火灾烟气分布特性,采用现场实测与数值模拟相结合的方法,建立高海拔隧道火灾燃烧数学模型,并采用试验数据验证了其合理性。在此基础上,以高海拔特长铁路隧道———关角隧道(32.645 km)为工程实例,建立关角铁路隧道火灾燃烧数学模型,研究高海拔特长铁路隧道内火灾条件下烟气的温度和浓度分布特性。通过研究得到高海拔特长铁路隧道火灾烟气在人眼特征高度处的分布规律,建议以420 s作为高海拔特长铁路隧道火灾人员可用安全疏散时间的参考值。The altitude affects the fire combustion characteristic. To get smoke distribution of fire in high-altitude super-long railway tunnels, a high-altitude tunnel fire numerical model was bulk. Its rational- ity was verified. A high-altitude super-long railway tunnel-the Guanjiao tunnel （32. 645 kin） in China was taken as an engineering example. Guanjiao railway tunnel fire burning mathematical model was built, and temperature and concentration distribution characteristics of the smoke under the high-altitude super-long railway tunnel fire were studied. Through research, it gives distribution characteristics of the smoke at the height of the eye and the reference value of the personnel available safe evacuation time is suggested to be 420 s under the high-altitude super-long railway tunnel fire.

关 键 词：高海拔 特长铁路隧道 隧道火灾 数值模拟 烟气分布 

分 类 号：X932[环境科学与工程—安全科学]