Critical ventilation velocity for tunnel fires occurring near tunnel exits

被引：39

作者：

Tsai, Kuang-Chung ^{[1
]}

Lee, Yee-Ping ^{[2
]}

Lee, Shin-Ku ^{[3
]}

机构：

[1] Natl Kaohsiung First Univ Sci & Technol, Dept Safety Hlth & Environm Engn, Kaohsiung 811, Taiwan

[2] Nanya Inst Technol, Dept Civil & Environm Engn, Jhongli 32091, Taoyuan County, Taiwan

[3] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 701, Taiwan

来源：

FIRE SAFETY JOURNAL | 2011年 / 46卷 / 08期

关键词：

Tunnel fire; Critical ventilation velocity; Ceiling jets;

D O I：

10.1016/j.firesaf.2011.08.003

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Ventilation is an effective method for controlling smoke during a tunnel fire. The "critical ventilation velocity" u(cr) is generally defined as the minimum velocity at which smoke is prevented from spreading against the longitudinal ventilation flow in tunnel fire situations. This study conducted small-scale experiments to investigate u(cr) for situations when tunnel fire occurs near tunnel exits. The model tunnel was 4 m long, 0.6 m wide and 0.6 m tall, and the fires were located at 0.5 m, 1.0 m and 1.5 m from the tunnel exit. 6.3 x 6.3 cm(2) and 9.0 x 9.0 cm(2) square asoline fuel pans were used as fire source. Results show that u(cr) decreases as the fire approaches the tunnel exit. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：556 / 557

页数：2

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