城际铁路隧道坡度对火灾温度及临界通风速率的影响

Influence of Intercity Railway Tunnel Slope on Fire Temperature and Critical Ventilation Rate

城际铁路客运系统可能存在的火灾危险性越来越受到关注,采用FDS模拟软件研究了CRH6型动车组着火时的温度分布情况,分析了隧道坡度对动车火灾烟气蔓延、临界通风速率的影响及相应工况下的温度分布和CO浓度分布情况,以期为城际铁路隧道火灾时的通风速度选择、人员的安全疏散时机及消防人员救援的时间判断提供一定的建议。

Intercity railway passenger transport systems and the possible fire risk are gaining increasing attention.FDS simulation software is used to study the temperature distribution of CRH6 electric vehicle. Analysis is made to study the influence of tunnel slope on the spread of the smoke and the critical ventilation velocity and the distribution of temperature and the concentration of carbon monoxide in the corresponding working conditions. The objective of the article is to provide some advices on the choice of ventilation speed for intercity railway tunnels,the time of safe evacuation of personnel and the time of firefighters’ rescue.