多工况下氢能源汽车隧道内火灾温度场研究  

Research on the temperature field of hydrogen energy vehicle tunnel fire under multiple operating conditions

作　　者：刘栋 叶继红 Liu Dong;Ye Jihong(School of Mechanics and Civil Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China)

机构地区：[1]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《消防科学与技术》2024年第3期344-350,共7页Fire Science and Technology

基　　金：江苏省基础研究计划自然科学基金项目(BK20220025)。

摘　　要：为了研究隧道内氢能源汽车分别沿上、下、前、后4个方向释放氢气并立即引燃后产生的温度场,使用Fluent软件对氢气释放并立即点燃后产生的温度场进行数值模拟仿真,分析了氢气泄漏方向和隧道通风速度对射流火焰最高温度以及高温区分布的影响,为隧道内通风速度的设定以及隧道内壁防火设计提供科学依据。结果表明:在氢能源汽车沿上、下、前、后4个方向释放氢气工况下,增大隧道纵向通风速度对降低射流火焰最高温度作用有限,但可显著减小高温区体积,从而减少射流火焰高温区对隧道各壁面造成的损伤。因此,在隧道设计阶段,建议适当增大隧道纵向通风速度,最佳通风速度为5.0~8.0 m/s;也可以考虑在隧道最右侧增加应急车道,以增大隧道壁面与车辆间的安全距离,进而保护隧道结构和车辆人员安全。This article takes the scenes of hydrogen energy vehicles releasing hydrogen in four different directions and immediately igniting it in a tunnel as the research objects.Fluent software is used to numerically simulate the temperature field generated after hydrogen is released and immediately ignited.The influence of hydrogen leakage direction and tunnel ventilation speed on the maximum temperature of jet flame and the distribution of high temperature zone is analyzed,providing scientific basis for the setting of ventilation speed in the tunnel and the fire prevention design of the inner walls of the tunnels.The results show that under these four working conditions,increasing the longitudinal ventilation speed of the tunnel has a limited effect on reducing the maximum temperature of the jet flame,but it can significantly reduce the volume of the hightemperature zone,thereby reducing the damage caused to the tunnel walls by the hightemperature zone of the jet flame.Therefore,in the tunnel design stage,it is recommended to increase the longitudinal ventilation speed of the tunnel appropriately,with the optimal ventilation speed of 5.0~8.0 m/s.It is also possible to consider adding an emergency lane on the far right side of the tunnel to increase the safe distance between the tunnel walls and vehicles,thereby protecting the tunnel structure and the safety of vehicle personnel.

关 键 词：氢能源汽车 氢气泄漏 隧道火灾 温度场 

分 类 号：X913.4[环境科学与工程—安全科学] TM912[电气工程—电力电子与电力传动]