Citation

Li N, Zhang Y, Hua Y, Zhang P. China Saf. Sci. J. 2020; 30(12): 141-147.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.12.020

PMID

unavailable

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. © 2020 China Safety Science Journal. All rights reserved.

Language: zh