Unsteady-state upward flame spreading velocity along vertical combustible solid and influence of external radiation on the flame spread

Yuji Hasemi, Masashi Yoshida, Akinori Nohara, Takuya Nakabayashi

Research output: Chapter in Book/Report/Conference proceedingChapter

6 Citations (Scopus)

Abstract

An asymptotic solution of flame spreading velocity along a vertical combustible solid is derived on the basis of previous experimental relations on the heat transfer from the flame to the surface. From the comparison of this with the steady-state solution, it was found that spontaneous flame spreading velocity starting from arbitorary initial conditions falls within relatively narrow range. Measurements of flame spread along vertical PMMA slabs with and without external radiation were conducted to verify the solution, which have revealed considerable acceleration of flame spread due to external radiation. Application of the theory to the evaluation of this influence has resulted in 30~40% overestimate of flame spreading velocity. This error is attributed to the higher pyrolysis temperature in the experiments than reference value and the dripping of molten fuel which was not considered in the model.

Original languageEnglish
Title of host publicationFire Safety Science
Subtitle of host publicationProceedings of the Third International Symposium
PublisherCRC Press
Pages197-206
Number of pages10
ISBN (Electronic)9781135378516
ISBN (Print)1851667199, 9780203973493
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes

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Keywords

  • Asymptotic
  • External radiation
  • Unsteady
  • Upward flame spread

ASJC Scopus subject areas

  • Engineering(all)
  • Arts and Humanities(all)

Cite this

Hasemi, Y., Yoshida, M., Nohara, A., & Nakabayashi, T. (2006). Unsteady-state upward flame spreading velocity along vertical combustible solid and influence of external radiation on the flame spread. In Fire Safety Science: Proceedings of the Third International Symposium (pp. 197-206). CRC Press. https://doi.org/10.4324/9780203973493