隧道区间内运行列车车顶火灾特性研究  

Study on the roof fire characteristics of running train in a tunnel

作　　者：樊新阳 唐飞[1] 黄亚军 胡隆华[1] Fan Xinyang;Tang Fei;Huang Yajun;Hu Longhua(State Key Laboratory of Fire Science,University of Science and Technology of China,Anhui Hefei 230026,China)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《消防科学与技术》2024年第9期1286-1291,共6页Fire Science and Technology

基　　金：国家重点研发计划课题(2022YFC3005201)。

摘　　要：为探究地铁区间隧道高速运行列车车顶火灾特性,构建缩尺寸隧道列车模型,开展移动火灾试验,设置不同列车运行速度及火灾热释放速率,并结合数值模拟,揭示隧道高速(20~150 km/h)运行列车车顶火灾发展特征参数演化的规律。试验结果表明:车顶最高温度随列车运行速度增加而呈现先增加后减小的趋势,其中,最大温差达205℃;此外,随着列车运行速度的增加,竖直火焰高度逐渐降低,水平火焰长度呈现出先增后减的变化趋势,临界运行速度随着热释放速率的增大而增加,并通过数值模拟验证了这一火灾行为。结合缩尺寸试验研究,构建了隧道运行列车车顶火灾水平火焰长度的分段预测模型。In order to study the fire development characteristics of high-speed running train roof fires in subway tunnel,a series of moving fire experiments were conducted on a constructed down-scaled tunnel train model,setting up different train running speeds and heat release rates,and full-scale numerical simula-tions were combined to reveal the evolution law of the fire charac-teristics of high-speed train roof fires in a tunnel(20~150 km/h).The experimental results show that the maximum temperature on the train roof shows a trend of increasing and then decreasing with the increase of train running speed,in which the maximum tem-perature change reaches 205°C;Moreover,with the increase of train running speed,the vertical flame height gradually decreases,and the horizontal flame length shows a trend of increasing and then decreasing,and the critical running speed increases with in-creasing heat release rate,which is verified by numerical simula-tion.Combined with the scaled-down experimental study,a seg-mented prediction model of the flame length of the roof fire of the running train in the tunnel was proposed.

关 键 词：隧道列车火灾 运动火源 火焰形态 温度分布 

分 类 号：X913.4[环境科学与工程—安全科学] U458.1[建筑科学—桥梁与隧道工程]