周晓宇, 龚剑, 刘强, 曾涛, 方早, 徐文娟, 戴玛. 地铁车厢起火时不同排烟模式下烟气流动分析[J]. 南昌航空大学学报(自然科学版), 2017, 31(3): 84-89. DOI: 10.3969/j.issn.1001-4926.2017.03.014
引用本文: 周晓宇, 龚剑, 刘强, 曾涛, 方早, 徐文娟, 戴玛. 地铁车厢起火时不同排烟模式下烟气流动分析[J]. 南昌航空大学学报(自然科学版), 2017, 31(3): 84-89. DOI: 10.3969/j.issn.1001-4926.2017.03.014
ZHOU Xiao-yu, GONG Jian, LIU Qiang, ZENG Tao, FANG Zao, XU Wen-juan, DAI Ma. Smoke Flow Analysis Under Different Exhaust Mode in Case a Fire Occurs in a Subway Carriage[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(3): 84-89. DOI: 10.3969/j.issn.1001-4926.2017.03.014
Citation: ZHOU Xiao-yu, GONG Jian, LIU Qiang, ZENG Tao, FANG Zao, XU Wen-juan, DAI Ma. Smoke Flow Analysis Under Different Exhaust Mode in Case a Fire Occurs in a Subway Carriage[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(3): 84-89. DOI: 10.3969/j.issn.1001-4926.2017.03.014

地铁车厢起火时不同排烟模式下烟气流动分析

Smoke Flow Analysis Under Different Exhaust Mode in Case a Fire Occurs in a Subway Carriage

  • 摘要: 为研究地铁火灾烟气的合理防治,针对地铁车厢发生火灾并停靠在站台的情况,建立了地铁车厢及站台的物理模型,设置站台和隧道的送风及排烟口位置以及其他尺寸参数,开展了3种不同排烟组合模式下烟气流动的数值模拟,分析比较了其烟气能见度、温度场和CO2浓度场的模拟结果,并提出了最优排烟组合方案。结果表明:同时打开站台和隧道的排烟装置将烟气排出,这样留在站台的烟气量相对较小,周围温度相对较低,同时车厢和站台的CO2浓度较低,对逃生过程中的视觉和呼吸系统影响较小。因而同时开启隧道和站台排烟装置的模式,产生的排烟效率最高、排烟效果最佳,是最优方案。研究结果为地铁火灾烟气的防治提供了理论依据,为地铁内人员的疏散提供了保障。

     

    Abstract: The reasonable prevention and control of smoke in subway fire was investigated in case of fire and docking at the platform. The physical model of the subway car and platform, the ventilation and smoke exit position of the platform and tunnel, and other parameters set up were set up. The numerical simulation of smoke flow under three different smoke exhaust modes is carried out. The simulation results of smoke visibility, temperature field and CO2 concentration field are analyzed and compared and the optimal smoke exhaust combination scheme is put forward. The results show that the smoke can be discharged simultaneously if the smoke exhaust device of the platform and tunnel are put on. Smoke concentration is thus relatively low and the ambient temperature is low, while the concentration of CO2 in the carriage and the platform is low and the impact on the vision and respiratory system in the process of escape is relatively less. Therefore, the mode of simultaneously opening smoke exhaust device at the tunnel and platform is the optimal plan, which results in the highest smoke exhaust efficiency and provides the best smoke exhaust effect. The results provide a theoretical basis for the prevention and control of smoke in subway fire and provide a guarantee for evacuation of subway personnel.

     

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