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Numerical Investigation on the Influence of Different Transverse Fire Locations on Smoke Bifurcation Flow in Tunnel Fire
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[1]Zhong Committee,Duanmu Weike,Li Hualin,et al.Numerical Investigation on the Influence of Different Transverse Fire Locations on Smoke Bifurcation Flow in Tunnel Fire[J].Journal of Zhengzhou University (Engineering Science),2017,38(01):27-.[doi:10.13705/j.issn.1671-6833.2016.04.023]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 38 Number of periods: 2017 01 Page number: 27- Column: Public date: 2017-02-24
Title:
Numerical Investigation on the Influence of Different Transverse Fire Locations on Smoke Bifurcation Flow in Tunnel Fire
Author(s):
Zhong Committee1; Duanmu Weike2; Li Hualin2; Liang Tianshui2
1. School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, Henan 450001 ;2. State Key Laboratory of Construction Safety and Environment, Beijing 100013
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CLC:
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DOI:
10.13705/j.issn.1671-6833.2016.04.023
Abstract:
When a fire occurd in tunnel,the longitudinal ventilation was used for personnel evacuation and smoke extraction.The stratification of smoke layer would be destroyed under high ventilation velocity,and would lead to smoke bifurcation flow,which was harmful to evacuation.The numerical simulations were conducted to investigate the influence of transverse fire locations on smoke bifurcation flow.The phenomena of smoke bifurcation flow with different transverse fire locations were studied.The results showed that the bifurcation flow was symmetric when fire located in the central line of tunnel;and a S-shaped flow occursed in a near wall fire situation.The critical velocity of smoke bifurcation flow increased exponentially when fire source moved to the sidewall.
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