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 language | English |
|---|---|
| Title of host publication | Fire Safety Science |
| Subtitle of host publication | Proceedings of the Third International Symposium |
| Publisher | CRC Press |
| Pages | 197-206 |
| Number of pages | 10 |
| ISBN (Electronic) | 9781135378516 |
| ISBN (Print) | 1851667199, 9780203973493 |
| DOIs | |
| Publication status | Published - 2006 Jan 1 |
| Externally published | Yes |
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Keywords
- Asymptotic
- External radiation
- Unsteady
- Upward flame spread
ASJC Scopus subject areas
- Engineering(all)
- Arts and Humanities(all)
Cite this
Unsteady-state upward flame spreading velocity along vertical combustible solid and influence of external radiation on the flame spread. / Hasemi, Yuji; Yoshida, Masashi; Nohara, Akinori; Nakabayashi, Takuya.
Fire Safety Science: Proceedings of the Third International Symposium. CRC Press, 2006. p. 197-206.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Unsteady-state upward flame spreading velocity along vertical combustible solid and influence of external radiation on the flame spread
AU - Hasemi, Yuji
AU - Yoshida, Masashi
AU - Nohara, Akinori
AU - Nakabayashi, Takuya
PY - 2006/1/1
Y1 - 2006/1/1
N2 - 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.
AB - 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.
KW - Asymptotic
KW - External radiation
KW - Unsteady
KW - Upward flame spread
UR - http://www.scopus.com/inward/record.url?scp=84949806580&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84949806580&partnerID=8YFLogxK
U2 - 10.4324/9780203973493
DO - 10.4324/9780203973493
M3 - Chapter
AN - SCOPUS:84949806580
SN - 1851667199
SN - 9780203973493
SP - 197
EP - 206
BT - Fire Safety Science
PB - CRC Press
ER -