Effects of buoyancy induced roof ventilation systems for smoke removal in tunnel fires

被引：71

作者：

Harish, R. ^{[1
]}

Venkatasubbaiah, K. ^{[1
]}

机构：

[1] Indian Inst Technol Hyderabad, Dept Mech Engn, Hyderabad 502205, Andhra Pradesh, India

来源：

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2014年 / 42卷

关键词：

Tunnel fire; Roof vents; Fire spread; Natural ventilation; ROAD TUNNEL; LONGITUDINAL VENTILATION; NATURAL VENTILATION; CRITICAL VELOCITY; POINT EXTRACTION; VERTICAL SHAFT; FLOW; TEMPERATURE;

D O I：

10.1016/j.tust.2014.03.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The present article highlights the performance of natural roof ventilation systems and its effects on tunnel fire flow characteristics. Numerical analysis is performed using Large Eddy Simulations (LES) to predict fire growth rate and smoke movement in tunnel with single and multiple roof openings. The smoke venting performance of ceiling vents are investigated by varying the vent size and fire source locations. The critical parameters such as mass flow rate through ceiling openings, smoke traveling time and fire growth patterns are presented. The ceiling openings are effective in transferring hot gases and reduces the longitudinal smoke velocity. The heat source and ceiling vent locations significantly affects the vent performance and smoke behavior in tunnel. The present results are in good agreement with the experimental results available in literature. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：195 / 205

页数：11

共 35 条

[1] Studies on buoyancy driven two-directional smoke flow layering length with combination of point extraction and longitudinal ventilation in tunnel fires [J].

Chen, L. F. ;

Hu, L. H. ;

Tang, W. ;

Yi, L. .

FIRE SAFETY JOURNAL, 2013, 59 :94-101

[2] On the bidirectional flow across an atrium ceiling vent [J].

Chow, W. K. ;

Li, J. .

BUILDING AND ENVIRONMENT, 2011, 46 (12) :2598-2602

[3] Oscillating behaviour of fire-induced air flow through a ceiling vent [J].

Chow, W. K. ;

Gao, Y. .

APPLIED THERMAL ENGINEERING, 2009, 29 (16) :3289-3298

[4] On smoke control for tunnels by longitudinal ventilation [J].

Chow, WK .

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 1998, 13 (03) :271-275

[5] Experimental study of air entrainment mode with natural ventilation using shafts in road tunnel fires [J].

Fan, C. G. ;

Ji, J. ;

Gao, Z. H. ;

Han, J. Y. ;

Sun, J. H. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2013, 56 (1-2) :750-757

[6] Numerical simulation of turbulent plume spread in ceiling vented enclosure [J].

Harish, R. ;

Venkatasubbaiah, K. .

EUROPEAN JOURNAL OF MECHANICS B-FLUIDS, 2013, 42 :142-158

[7]

Harish R., 2013, 13 INT C FIR SCI ENG, P175

[8]

Hong W, 2004, 6 AS OC S FIR SCI TE, P28

[9] Experimental and numerical studies on longitudinal smoke temperature distribution upstream and downstream from the fire in a road tunnel [J].

Hu, L. H. ;

Huo, R. ;

Wang, H. B. ;

Yang, R. X. .

JOURNAL OF FIRE SCIENCES, 2007, 25 (01) :23-43

[10] Effects of the ventilation duct arrangement and duct geometry on ventilation performance in a subway tunnel [J].

Huang Yuan-dong ;

Gong Xiao-lu ;

Peng Yue-jiao ;

Lin Xiao-yu ;

Chang-Nyung, Kim .

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2011, 26 (06) :725-733

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