Numerical investigation on the effect of ambient pressure on smoke movement and temperature distribution in tunnel fires

被引：116

作者：

Ji, Jie ^{[1
,2
]}

Guo, Fangyi ^{[1
]}

Gao, Zihe ^{[1
]}

Zhu, Jiping ^{[1
]}

Sun, Jinhua ^{[1
]}

机构：

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

[2] Univ Sci & Technol China, Inst Adv Technol, Hefei 230088, Anhui, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2017年 / 118卷

基金：

中国国家自然科学基金;

关键词：

Ambient pressure; Tunnel fire; Smoke movement; Temperature distribution; NATURAL VENTILATION; VERTICAL SHAFTS; MAXIMUM TEMPERATURE; AIR ENTRAINMENT; JET FAN; SIMULATION; FLOW; VELOCITY; SYSTEMS; PLUME;

D O I：

10.1016/j.applthermaleng.2017.03.026

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A series of simulations are conducted in a full scale road tunnel to explore the effect of ambient pressure on smoke movement and temperature distribution in tunnel fires. Once a tunnel fire occurs, beyond the radial and transition stage, the smoke gradually transforms into the one-dimensional spread stage where the characteristic of smoke movement is important for the safe evacuation and smoke control. Firstly, based on the transverse temperature difference and dimensional analysis, the range of one-dimensional spread stage for different conditions is analyzed. Secondly, the variation of longitudinal smoke temperature with ambient pressure is explained. Taking the temperature rise at the starting position of one-dimensional spread stage as a reference, a uniform correlation of longitudinal smoke temperature extended to low pressure conditions is proposed. Finally, the correlation is compared with previous experimental results at normal pressure. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：663 / 669

页数：7

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