Flame characteristic and ceiling temperature distribution under the effect of curved sidewall

Zhen-huan Liang; Guo-qing Zhu; Hao-nan Liu; Xiang Zhou

Case Studies in Thermal Engineering (Sep 2019)

Flame characteristic and ceiling temperature distribution under the effect of curved sidewall

Zhen-huan Liang,
Guo-qing Zhu,
Hao-nan Liu,
Xiang Zhou

Affiliations

Zhen-huan Liang: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou, 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, 221116, China; Corresponding author. Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China.
Guo-qing Zhu: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou, 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, 221116, China
Hao-nan Liu: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou, 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, 221116, China
Xiang Zhou: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou, 221116, China; Fire Research Institute, China University of Mining and Technology, Xuzhou, 221116, China

Journal volume & issue: Vol. 14

Abstract

Read online

This experimental study focused on fire source combustion characteristics and the distribution law of fire temperature field in the utility tunnel caused by side wall constraint effect. The oil pans are placed at 0 m, 0.15 m, 0.3 m, 0.45 m from the side wall and the center of the model to study the influence of the side wall of the utility tunnel on the flame height, flame shape and temperature distribution of the ceiling. The flame height increases with the fire source gradually approaching the side wall from the center line. According to the flow path of the fire plume, the effective height of the ceiling is corrected. It is found that the longitudinal attenuation of temperature in the center of the ceiling shows a power exponential attenuation law. The temperature distribution under the tunnel ceiling near the fire source area is asymmetrical. When the distance from the fire source center to the side wall increases to 0.4 m and the longitudinal distance increases to 1.2 m, the temperature distribution tends to be symmetrical. Keywords: Side wall constraint, Flame height, Maximum temperature rise, Temperature distribution

Published in Case Studies in Thermal Engineering

ISSN: 2214-157X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/case-studies-in-thermal-engineering/

About the journal