初始引火源燃烧特征对动车车厢轰燃的影响研究  

Study on influence of combustion characteristics of initial ignition source on flashover in EMU carriage

作　　者：邢文典 王明年[1,2] 李琦 XING Wendian;WANG Mingnian;LI Qi(School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu Sichuan 610031, China;College of Architecture and Urban-Rural Planning, Sichuan Agricultural University, Dujiangyan Sichuan 611830, China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [3]四川农业大学建筑与城乡规划学院,四川都江堰611830

出　　处：《中国安全生产科学技术》2018年第5期36-42,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51578458);中国铁路总公司科技研究开发计划重大课题(2014G004-C)

摘　　要：为了研究动车组发生火灾时车厢内火焰不断蔓延、火势不断增大导致车厢内轰燃的情况,并得到引起车厢轰燃的临界初始引火源热释放速率及所需燃烧持续时间,采用火灾动力学三维模拟软件FDS模拟其燃烧过程,分析在持续燃烧和非持续燃烧2种状态下不同热释放速率的初始引火源引起的动车组车厢轰燃情况。结果表明:引起动车组车厢轰燃的临界初始引火源热释放速率值为160 k W,燃烧持续时间临界值为1 470 s。随着初始引火源热释放速率的增大,车厢发生轰燃的时间变短,两者之间存在乘幂函数关系;且发生轰燃所需的火源燃烧持续时间也随之缩短,两者之间同样存在乘幂函数关系。根据动车组车厢内常见初始引火源特征,明确了不同行李物品作为初始引火源对动车组车厢发生轰燃的危险性。To study the situation that when the fire occurs in the carriage of electric multiple units（ EMU）,the fire may spread and increase continually and lead to the flashover in the carriage,thus obtain the critical heat release rate（ HRR） and burning duration of the initial ignition source needed to cause the carriage＇s flashover,the combustion process was simulated by using Fire Dynamics Simulator（ FDS） software,and the flashover situation of the EMU carriage caused by the initial ignition sources with different HRR under two states of continuous combustion and non-continuous combustion was analyzed.The results showed that the critical HRR of the initial ignition source causing the flashover of the EMU carriage was 160 k W,and the critical burning duration was 1470 s. The greater the HRR of the initial ignition source,the shorter the time of flashover,and there was a power function relationship between them. According to the characteristics of common initial ignition sources in the EMU carriages,the danger of different passenger luggage as the initial ignition source for the flashover of the EMU carriage was determined.

关 键 词：初始引火源 热释放速率 燃烧持续时间 动车组车厢 轰燃 

分 类 号：X924.4[环境科学与工程—安全科学] TU242.2[建筑科学—建筑设计及理论]