Large eddy simulation on the effect of smoke exhaust openings arrangement on the smoke spread in tunnel fires

被引：5

作者：

Wang, Qiang ^{[1
]}

Tang, Fei ^{[2
]}

Li, Lian-jian ^{[2
]}

Zhang, Xiao-chun ^{[3
]}

Fan, Chuan-gang ^{[2
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Peoples R China

[2] Hefei Univ Technol, Sch Transportat Engn, Hefei 230009, Peoples R China

[3] Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

2015 INTERNATIONAL CONFERENCE ON PERFORMANCE-BASED FIRE AND FIRE PROTECTION ENGINEERING (ICPFFPE 2015) | 2016年 / 135卷

关键词：

Tunnel fires; Exhaust openings arrangement; Smoke control; Temperature distribution; CFD SIMULATIONS; VENTILATION; JET;

D O I：

10.1016/j.proeng.2016.01.135

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper reveals effect of smoke exhaust openings arrangement on the smoke spread performance in the tunnel fire of semi-transverse smoke extraction mode. Results show that the smoke back-layering can be significantly affected by the upstream openings arrangement in tunnel fires. As the more exhaust openings added to upstream, the smoke back-layering length becomes stronger and smoke spread rate remarkably increase. Moreover, the maximum smoke temperature above the fire source also remarkably increase due to combined effect of longitudinal air flow and the amount of smoke exhaust increased in upstream from the fire. Consequently, the fire risk to the blocked occupants and the tunnel structure increase in upstream. This research can contribute to the design of fire safety facilities and management of fire emergency in tunnels with similar conditions. (C) 2016 The Authors. Published by Elsevier Ltd.

引用

页码：309 / 315

页数：7

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