Study on critical length for simulation in tunnel fires

被引：6

作者：

Wang, Zhengyang ^{[1
,3
]}

Jiang, Xuepeng ^{[1
,2
,3
]}

Tang, Fei ^{[4
]}

Li, Jian ^{[5
]}

机构：

[1] Wuhan Univ Sci & Technol, Sch Resource & Environm Engn, Wuhan 430081, Hubei, Peoples R China

[2] Hubei Prov Ind Safety Engn Technol Res Ctr, Wuhan 430081, Hubei, Peoples R China

[3] Wuhan Univ Sci & Technol, Inst Fire Safety Technol, Wuhan 430081, Hubei, Peoples R China

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

[5] China Acad Safety Sci & Technol, Inst Traff Safety Technol, Beijing 100012, Peoples R China

来源：

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2021年 / 115卷

基金：

中国国家自然科学基金;

关键词：

Tunnel fire; Critical length for simulation; Heat release rate; Tunnel cross-section; CRITICAL VENTILATION VELOCITY; BACK-LAYERING LENGTH; NATURAL VENTILATION; TEMPERATURE DISTRIBUTION; SMOKE TEMPERATURE; GAS TEMPERATURE; AMBIENT-PRESSURE; VERTICAL SHAFT; PREDICTION; DISTANCE;

D O I：

10.1016/j.tust.2021.104013

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Reasonable simulation length is of great significance to improve the computational efficiency. However, few research about the critical length for simulation have been conducted. In this study, critical length for simulation in tunnel fires was investigated numerically and theoretically. Through analyzing the variation of smoke layer temperature and smoke mass flow rate under different tunnel length, a criterion for selecting critical length is presented. Effect of tunnel cross-section and heat release rate on the critical length for simulation will be clarified. The linear growth relationship between the nondimensionless critical length L* and nondimensionless heat release rate Q* was obtained. This model perform good agreement with the full-scale tunnel fire test values of predecessors.

引用

页数：12

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