The effects of sidewall constraint on temperature distribution of fire-induced thermal flow under an arc-ceiling

5th Asia Conference on Mechanical and Materials Engineering

机械制造;材料科学

Zhou, Tiannian^1 ; Rong, Jianzhong^2 ; Wang, Jian^1

State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui

230026, China^1

Sichuan Fire Research Institute of Ministry of Public Security, Chengdu, Sichuan

610036, China^2

关键词: Centerlines;    Constraint effects;    Cross-sectional structures;    Fire locations;    Thermal flows;    Tunnel model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/241/1/012038/pdf
DOI  :  10.1088/1757-899X/241/1/012038

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A numerical study with varying transverse fire locations based on a semicircle tunnel model was carried out and it was used to further compare with the rectangular model in the published literature, aimed to investigate the influence of cross-sectional structure on temperature distribution under the ceiling. Results demonstrate that the reduction in temperature along the tunnel centerline under the flat ceiling is greater than that under the arc-ceiling. In addition, the influence of constraint effect of sidewall under the arc-ceiling is more significant than the flat ceiling because the flame would attach the ceiling when the fire is near the sidewall.