Experimental investigation of maximum temperature and longitudinal temperature distribution induced by linear fire in portals-sealed tunnel

Rong-liang Pan; Guo-qing Zhu; Pu-fan Wang; Xiang Zhou; Zhen-huan Liang; Hao-nan Liu; Gang Xu

Case Studies in Thermal Engineering (Feb 2021)

Experimental investigation of maximum temperature and longitudinal temperature distribution induced by linear fire in portals-sealed tunnel

Rong-liang Pan,
Guo-qing Zhu,
Pu-fan Wang,
Xiang Zhou,
Zhen-huan Liang,
Hao-nan Liu,
Gang Xu

Affiliations

Rong-liang Pan: 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
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; Corresponding authors. Jiangsu Key Laboratory of Fire Safety in Urban Underground Space(China University of Mining and Technology), Xuzhou, 221116, China.
Pu-fan Wang: 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
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
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
Gang Xu: 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. 23
p. 100804

Abstract

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A set of experimental tests were conducted to investigate the maximum gas temperature rise and longitudinal temperature distribution beneath the centerline ceiling in a portals-sealed arched tunnel, taking fuel tank central angle location along the sidewall (expressed by effective ceiling height) and linear fire size into account. A linear fuel tank burner, placed on the arched sidewall of the tunnel, was utilized to simulate the fire source. A new empirical formula was proposed to predict the maximum excess temperature beneath the ceiling in a portals-sealed tunnel fire, based on dimensional analysis. The experimental results show that the non-dimensional maximum excess temperature has an exponential decaying relationship with non-dimensional fuel tank length. A predecessor's equation is modified to present the longitudinal temperature distribution beneath the centerline of arced-ceiling in a portals-sealed tunnel fire, which is consists of the sum of two exponential equations. The comparison of longitudinal temperature distribution between fire in portals-sealed tunnel and natural ventilation tunnel was conducted. The study is expected to provide some references for actual tunnel fire-fighting.

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/

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