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

Fei Tang, Peng Hu, Jianping Zhang, Jennifer Wen

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8 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)4569-4577
JournalProceedings of the Combustion Institute
Issue number3
Publication statusPublished (in print/issue) - 5 Aug 2020

Bibliographical note

Funding Information:
This work was supported jointly by National Nature Science Funds of China under Grant No. 51776060 and Fundamental Research Funds for the Central Universities (Grant No. PA2019GDQT0014 ).

Publisher Copyright:
© 2020 The Combustion Institute. Published by Elsevier Inc.


  • Aspect ratio
  • Ceiling jet
  • Channel fire
  • Heat flux
  • Wall fire


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