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Heat fluxes under the ceiling induced by wall fires with various burner aspect ratios in a channel

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Tang, Fei, Hu, Peng, Zhang, Jianping and Wen, Jennifer X. (2020) Heat fluxes under the ceiling induced by wall fires with various burner aspect ratios in a channel. Proceedings of the Combustion Institute . doi:10.1016/j.proci.2020.05.029 (In Press)

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Official URL: https://doi.org/10.1016/j.proci.2020.05.029

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Abstract

A detailed experimental investigation of wall fires in a channel was conducted to study the heat fluxes under the ceiling. Various burner aspect ratios and fire heat release rates were employed to simulate different wall fire scenarios. The effect of source-ceiling height was also examined. The results show that the distribution of heat flux under the ceiling from fires on rectangular burners was significantly influenced by the burner aspect ratio. As the burner aspect ratio increased, the heat flux under the ceiling at a given position perpendicular to the side wall increased. It was found that the existing heat flux correlation developed for a square burner could not capture such influence as it did not include the burner aspect ratio. A new predictive model based on the equivalent burner diameter concept was proposed incorporating the burner aspect ratio and was shown to predict well the heat flux for all the cases with different heat release rates, burner aspect ratios and source-ceiling heights. The model was also validated against available data in the literature which were not used in its derivation. Further analysis was also conducted for the temperature contours constructed from the temperature measurements under the ceiling.

Item Type: Journal Article
Subjects: T Technology > TH Building construction
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Heat -- Transmission, Flame spread, Fires
Journal or Publication Title: Proceedings of the Combustion Institute
Publisher: Elsevier Inc.
ISSN: 1540-7489
Official Date: 2020
Dates:
DateEvent
2020Published
5 August 2020Available
31 May 2020Accepted
Date of first compliant deposit: 5 August 2020
DOI: 10.1016/j.proci.2020.05.029
Status: Peer Reviewed
Publication Status: In Press
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
5177606[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
PA2019GDQT0014Fundamental Research Funds for the Central Universitieshttp://dx.doi.org/10.13039/501100012226

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