The experimental study on the flame extension length and maximum temperature of ceiling jet flame in the curved tunnel

被引：0
作者：
Gao, Yang [1 ]
Fang, Yuhao [1 ]
Gong, Lunlun [1 ]
Yang, Shenlin [2 ]
Tao, Changfa [1 ]
Xu, Wei [3 ]
机构：
[1] Hefei Univ Technol, Sch Automot & Transportat Engn, Hefei 230009, Anhui, Peoples R China
[2] Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Anhui, Peoples R China
[3] Naval Logist Acad, Tianjin 300450, Peoples R China
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2025年 / 161卷
基金：
中国国家自然科学基金;
关键词：
Curved tunnel fire; Ceiling jet flame; Flame extension length; Maximum temperature; DIFFUSION FLAMES; HEIGHT;
D O I：
10.1016/j.tust.2025.106571
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper investigated the extension length and maximum temperature of ceiling jet flame with different fire source locations within the curved tunnel. A series of experiments were conducted in a 1:15 reduced-scale tunnel with four different bending radians. Two nozzle diameters (2 and 4 mm) and four fire source positions were considered, while the propane was used as the fuel gas. The experimental results reveal distinct extension characteristics of ceiling jet flame in both the transverse and longitudinal directions. Dimensionless correlations for the transverse and longitudinal extension length of ceiling jet flame have been developed. Additionally, the variation in maximum temperature under different tunnel bending radians was analyzed based on the flame geometry model, which leads to the establishment of theoretical model for predicting the maximum temperature.
引用
收藏
页数：12
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