Impact of external wind field on spread of luggage fire in high-speed rail carriage

doi:10.16265/j.cnki.issn 1003-3033.2020.12.020

Abstract

Abstract: In order to improve fire safety level and emergency rescue capabilities of high-speed trains, with a second-class carriage of Fuxing train as a prototype, parameters such as fire HRR, ceiling smoke temperature, smoke field temperature at human eye characteristic height, CO concentration and visibility were tested by model experiments and numerical simulations under different velocity of longitudinal winds outside carriage. Then, influence of wind environment on development characteristic of luggage fires in carriage and passenger evacuation safety was analyzed. The results show that when total HRR of luggage fire reaches 1 108 kW without influence of wind, fire flashover bursts out. And there is a critical value between 4 and 4.5 m/s. External wind will entrain fresh air and enhance development of fire when its speed is lower than critical value, and on the contrary, its smoke dissipation and cooling effect will be more significant, which further inhibits fire development. Meanwhile, wind exacerbates spread of smoke and decreases visibility, which is not conducive to evacuation of passengers from downwind

Key words: external wind field, high-speed railway carriage, luggage fire, heat release rate (HRR), visibility

CLC Number:

X932

LI Na, ZHANG Yan, HUA Yudong, ZHANG Peihong. Impact of external wind field on spread of luggage fire in high-speed rail carriage[J]. China Safety Science Journal, 2020, 30(12): 141-147.

References

[1] CHOW W K, LAM K C, FONG N K, et al. Numerical simulations for a typical train fire in China[J]. Modelling and Simulation in Engineering, 2011, 2011: 369470.
[2] 韦岩. 综合管廊断面形状及风速对火灾和排烟的影响研究[D]. 西安: 长安大学, 2019.
WEI Yan. Study on the influence of sectional shape and wind speed of utility tunnel on fire and smoke exhaust [D]. Xi'an: Chang'an University, 2019.
[3] 孙少华, 程家骥, 丛北华, 等. 强制通风对隧道起火影响的全尺寸试验研究[J].中国安全科学学报,2018,28(10): 56-61.
SUN Shaohua, CHENG Jiaji, CONG Beihua, et al. Full-scale experimental study on effects of forced ventilation on tunnel fire[J]. China Safety Science Journal, 2018,28(10): 56-61.
[4] 王明年, 田源, 于丽, 等. 基于隧道火灾蔓延下的车辆引燃时间预测研究[J].中国安全科学学报,2018,28(12): 46-51.
WANG Mingnian, TIAN Yuan, YU Li, et al. Prediction of vehicle ignition time based on fire spreading in tunnel. [J]. China Safety Science Journal, 2018,28(12): 46-51.
[5] 王升. 高速列车车厢内火灾燃烧特性研究[D].成都: 西南交通大学, 2017.
WANG Sheng. The research of fire combustion characteristics in high-speed train [D]. Chengdu: Southeast Jiaotong University, 2017.
[6] 田鑫, 苏燕辰, 席亚军, 等. 高速列车火灾疏散性能研究[J]. 城市轨道交通研究, 2017, 20(6): 66-69.
TIAN Xin, SU Yanchen, XI Yajun, et al. Research on the evacuation of high-speed train in fire disaster [J]. Urban Mass Transit, 2017, 20(6): 66-69.
[7] 钟茂华, 刘畅, 杨宇轩, 等. 地铁单面坡隧道列车火灾通风模式研究[J]. 中国安全生产科学技术, 2018, 14(12): 5-13.
ZHONG Maohua, LIU Chang, YANG Yuxuan et al. Study on ventilation mode for train fire in metro tunnel with single-side slope [J]. Journal of Safety Science and Technology, 2018, 14(12): 5-13.
[8] 徐志胜, 周庆, 徐彧, 等. 运行旅客列车隧道火灾模拟实验研究[J].中国安全科学学报, 2003, 13(7): 8-11.
XU Zhisheng, ZHOU Qing, XU Yu, et al. Study on simulated fire experiment of running passenger train in tunnel [J]. China Safety Science Journal, 2003, 13(7): 8-11.
[9] MO Shanjun, LI Zirong, LIANG Dong, et al. Analysis of smoke hazard in train compartment fire accidents base on FDS[J]. Procedia Engineering, 2013, 52: 284-289.
[10] 王云, 程堂明, 任永卫, 等. 基于FDS模拟的动车车厢火灾烟气迁移特性研究[J].中国安全生产科学技术,2012,8(7): 24-29.
WANG Yun, CHENG Tangming, REN Yongwei, et al. Study on smoke migration characteristics of EMU compartment fire based on FDS simulation [J]. Journal of Safety Science and Technology, 2012, 8(7): 24-29.
[11] LÖNNERMARK A, INGASON H, LI Yingzhen, et al. Fire development in a 1/3 train carriage mock-up [J]. Fire Safety Journal, 2017, 91(1): 432-440.
[12] 王爱武, 徐志胜, 游温娇, 等. CRH6高速列车火灾规模及影响因素研究[J]. 安全与环境学报, 2019, 19(4): 1 259-1 265.
WANG Aiwu, XU Zhisheng, YOU Wenjiao, et al. Analysis of the fire scale and the influential factors of CRH6 express train [J]. Journal of Safety and Environment, 2019, 19(4): 1 259-1 265.
[13] 陈俊敏,姚小林,阎刚, 等. CRH1型动车组一等座车厢火源热释放速率研究[J].中国安全生产科学技术, 2014, 10(1): 5-10.
CHEN Junmin, YAO Xiaolin, YAN Gang, et al. Study on heat release rate of first class compartment of CRH1 EMU train [J]. Journal of Safety Science and Technology, 2014, 10(1): 5-10.