周丹;李慎宇;王哲;陈涛;

• 1:中南大学交通运输工程学院轨道交通安全教育部重点实验室

摘要(Abstract)：

为了探究隧道坡度对地铁列车发生火灾时烟气蔓延特性的影响，采用计算流体力学软件Fluent,对精细化地铁列车模型在坡度隧道内携火源运动情况下的流场速度、烟气逆流规律进行了数值模拟，并通过火灾动模型试验验证了数值模拟方法的准确性。结果表明：列车运行过程中发生火灾时，活塞风主导了烟气的运动，随着活塞风不断衰减，烟气最终会发生逆流；坡度对隧道内烟气蔓延规律的影响主要体现在列车减速停车后，当列车静止一段时间，即t≥100 s时，隧道拱顶下方烟气流速峰值随坡度增大而增大，但烟气浓度峰值随坡度增大而减小，并且隧道坡度越大，烟气的逆流时刻越晚，逆流速度越小，上游的浓度也越低。

关键词(KeyWords)： 安全工程;隧道坡度;地铁列车;活塞风;流速;浓度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(U1534210)

作者(Authors): 周丹;李慎宇;王哲;陈涛;

DOI: 10.13637/j.issn.1009-6094.2020.1591

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