首页|隧道区间内运行列车车顶火灾特性研究

隧道区间内运行列车车顶火灾特性研究

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

tunnel train firemoving fireflame shapetempera-ture distribution

樊新阳、唐飞、黄亚军、胡隆华

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中国科学技术大学 火灾科学国家重点实验室,安徽 合肥 230026

隧道列车火灾 运动火源 火焰形态 温度分布

2024

消防科学与技术
中国消防协会

消防科学与技术

CSTPCD北大核心
影响因子:0.846
ISSN:1009-0029
年,卷(期):2024.43(9)