车窗多模式破裂对城际列车火灾发展的影响  

Effect of the multi-mode window broken on the fire development in the inter-city train

作　　者：陈涛[1] 李耀庄[1] 徐志胜[1] 孔杰 CHEN Tao;LI Yao-zhuang;XU Zhi-sheng;KONG Jie(School of Civil Engineering,Central South University,Hu.nan Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《消防科学与技术》2018年第10期1423-1427,共5页Fire Science and Technology

基　　金：中国铁路工程总公司重大专项项目(2016K36-A)

摘　　要：综合考虑机械和温度控制两种车窗破裂模式,设置车厢中部和端部两组火灾工况,研究车窗破裂对CRH6型城际列车火灾发展规律的影响。火源功率设置为2 MW,车窗破裂温度阈值为600℃,机械控制开口时间设置为300 s。结果显示:机械开口对车厢中部火灾最大热释放速率的影响不大,但是会影响车窗破裂部位分布,从而影响车厢内温度场分布,双侧机械开口的对流冷却作用会降低车厢端部的最大火灾热释放速率;车厢中部火灾达到最大热释放速率的时间比端部火灾快15.7%;火灾发生300 s后,车窗破裂个数随时间变化曲线与热释放速率曲线非常相似。Considering the two window breaking mode of mechanical and temperature comprehensively,two groups of experiments which fire source located at the middle and one end of the train were set and the effect of the window broken on the fire development of inter-city train was researched.The combustion source power was 2 MW,the time of the window broken under mechanical mode was 300 s and temperature of window broken under temperature mode was 600℃.The result showed that the impact of the mechanical openings on the heat release rate of a fire which located at the middle of the train is negligible,but it can affect the distribution of the broken window and thus influence the distribution of the temperature field;the convection and cooling effect of the doubleside mechanical openings can lower the maximum heat release rate of the one end fire.The time for the middle fire to reach the largest heat release rate was 15.7%faster than the one end fire.The curve of the broken window number over time is very similar to heat release rate curve 300 s after the ignition.

关 键 词：城际列车 车窗破裂 热释放速率 温度场变化 

分 类 号：X951[环境科学与工程—安全科学] U266.2[机械工程—车辆工程]