摘要
利用Fluent建立隧道内油罐车运动火灾模型,模拟研究不同行驶速度下,隧道内油罐车发生火灾后的温度分布和烟气输运规律。结果表明,在行驶速度较慢时,隧道内会形成顶棚射流,羽流向运动前方扩散速度较快且温度较高,高温区的影响范围、烟气浓度及分布范围也较大。随着车速增大,顶棚射流的位置更加靠近运动前方,顶棚射流难以形成,油罐车后方形成卷吸的涡旋团流,高温区影响范围也在相对风流的作用下逐渐减小,烟气浓度在油罐车后方的某一位置出现突变。
The Fluent software is used to establish the motion fire model of the tank truck in the tunnel and the numerical simulation was made.The temperature distribution and smoke spread law of the tank truck in the tunnel after fire are mainly studied under different driving speeds.The results show that when the driving speed is low,the ceiling jet will be formed in the tunnel,the diffusion speed of the plume to the front of the movement is faster and the temperature is higher,the influence range of the high temperature zone,the smoke concentration and the distribution range are also larger.With the increase of speed,the position of the ceiling jet is also closer to the front of the movement,the ceiling jet is difficult to form,and the vortex mass flow is formed behind the tank truck.The influence range of the high temperature zone is also gradually reduced as to the wind flow,and the smoke concentration changes sharply at a certain position behind the tank truck.
作者
安伟光
广大庆
陈凡宝
An Weiguang;Guang Daqing;Chen Fanbao(School of Safety Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Jiangsu Key Laboratory of Fire Safety in Urban Underground Space,Jiangsu Xuzhou 221116,China)
出处
《消防科学与技术》
CAS
北大核心
2023年第6期742-746,共5页
Fire Science and Technology
基金
国家自然科学基金(51974298)。
关键词
隧道
油罐车火灾
数值模拟
温度分布
烟气蔓延
tunnel
oil tank fire
numerical simulation
temperature distribution
smoke spread
