Experimental study on combustion parameters and temperature distribution of linear fire under different oxygen concentration in tunnel

Gang Xu; Guoqing Zhu; Rongliang Pan; Xin Liu

doi:10.1016/j.rineng.2021.100272

Results in Engineering (Sep 2021)

Experimental study on combustion parameters and temperature distribution of linear fire under different oxygen concentration in tunnel

Gang Xu,
Guoqing Zhu,
Rongliang Pan,
Xin Liu

Affiliations

Gang Xu: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; Institute of Public Safety and Fire Engineering, China University of Mining and Technology, Xuzhou, 221116, China
Guoqing Zhu: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; Institute of Public Safety and Fire Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Corresponding author. School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China.
Rongliang Pan: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; Institute of Public Safety and Fire Engineering, China University of Mining and Technology, Xuzhou, 221116, China; Department of Civil Engineering, Aalto University, FI-00076, AALTO, Finland
Xin Liu: Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, 221116, China; Institute of Public Safety and Fire Engineering, China University of Mining and Technology, Xuzhou, 221116, China

DOI: https://doi.org/10.1016/j.rineng.2021.100272
Journal volume & issue: Vol. 11
p. 100272

Abstract

Read online

Many cables are placed in the underground utility tunnel, which are with greater fire hazards. Once fire occurs in an enclosed tunnel, thermal radiation may ignite the adjacent cables, which will cause cable fire and further expanding of fire scale, and oxygen will be consumed over time. Thus, it's important to investigate cable fire under low oxygen concentration. In this paper, a fire experiment has carried out in a reduced-scale enclosed tunnel with different heights of linear fire near the side wall. The combustion parameters, as well as transverse temperature distribution and maximum ceiling temperature rise under different oxygen concentration are investigated. Based on oxygen consumption calorimetry, the combustion efficiency and heat release rate of each fire source can be obtained. And two formulas to predict transverse temperature distribution and temperature rise under ceiling are proposed based on dimensionless analysis. Results show that different combustion parameters changing under varies oxygen concentrations, two temperature peaks exist in the cross section and the highest temperature is directly above the fire source. Conclusions are given to provide references in fire protection work in utility tunnel.

Published in Results in Engineering

ISSN: 2590-1230 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology
Website: https://www.journals.elsevier.com/results-in-engineering

About the journal

Abstract

Keywords