Critical roof opening longitudinal length for complete smoke exhaustion in subway tunnel fires

被引：20

作者：

He, Kun ^{[1
]}

Cheng, Xudong ^{[1
]}

Zhang, Shaogang ^{[2
]}

Yang, Hui ^{[1
]}

Yao, Yongzheng ^{[1
]}

Peng, Min ^{[1
]}

Cong, Wei ^{[1
]}

机构：

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

[2] Shanghai Maritime Univ, Coll Ocean Sci & Engn, Shanghai 201306, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2018年 / 133卷

基金：

中国国家自然科学基金;

关键词：

Critical opening longitudinal length; Complete smoke exhaustion; Smoke control; Temperature distribution; URBAN ROAD TUNNEL; NATURAL VENTILATION; VERTICAL SHAFTS; TEMPERATURE; SIMULATION; GASES; MODEL; FLOW;

D O I：

10.1016/j.ijthermalsci.2018.07.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A series of experiments were conducted to investigate the smoke exhaustion in a subway tunnel under natural ventilation with a wide roof opening (its width is equal to tunnel width) based on a 1/10 reduced-scale tunnel model. The effect of the roof opening longitudinal length on the smoke exhaustion was addressed both theoretically and experimentally. The results indicated that there existed a critical opening longitudinal length which allows a complete smoke exhaustion under fire conditions. The critical opening longitudinal length was related to the tunnel aspect ratio and the distance between fire source and roof opening. A theoretical model was also developed to predict the critical opening longitudinal length for subway tunnel. The research outcomes of this study provide a technical guide for the future subway tunnel design.

引用

页码：55 / 61

页数：7

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