不同通风条件下车厢火灾烟气运动的数值模拟研究  

Numerical Simulation of Smoke Movement in Train Compartment Fire Under Different Ventilation Conditions

作　　者：覃道枞 郭兵 周健 陈小开[1] QIN Daocong;GUO Bing;ZHOU Jian;CHEN Xiaokai(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《工业安全与环保》2020年第10期29-33,共5页Industrial Safety and Environmental Protection

摘　　要：运用火灾动力学软件FDS模拟计算了不同通风条件下列车车厢内部烟气扩散流动的情况,对比分析了不同通风模式下,列车车厢内部空气温度与能见度随火灾时间的变化规律。结果表明:机械排烟和开启火源附近两侧外窗相比仅两端门开启时有利于烟气能较早的排出,但随着时间的推移,外窗和机械排烟口的排烟作用逐渐减小,火灾后期机械排烟效果较差。The fire dynamics software FDS was used to simulate and calculate the diffusion flow of smoke in the train compartment under different ventilation conditions.The variation of the air temperature and visibility inside the train compartment with the extension of the fire time was compared and analyzed under different ventilation modes.The results show that,compared with the opening of the external windows on both sides near the fire source,the mechanical smoke exhaust effect of the external windows and the mechanical smoke exhaust port decreases gradually with the passage of time,but the mechanical smoke exhaust effect is poor in the later stage of the fire.

关 键 词：FDS模拟 温度 能见度 机械排烟 

分 类 号：U298.4[交通运输工程—交通运输规划与管理]