A Computational Study on Flame-Solid Radiative Interaction in Flame Spread Over Thin Solid-Fuel
A detailed, two-dimensional, laminar, flame spread model over a thin solid is solved in both a normal gravity downward spread configuration and in a microgravity quiescent atmosphere configuration. The radiation transfer equation is solved using discrete ordinates methods. While flame radiation play...
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Veröffentlicht in: | Journal of heat transfer 2004-08, Vol.126 (4), p.611-620 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A detailed, two-dimensional, laminar, flame spread model over a
thin solid is solved in both a normal gravity downward spread configuration and
in a microgravity quiescent atmosphere configuration. The radiation transfer
equation is solved using discrete ordinates methods. While flame radiation plays
only a secondary role in normal gravity spread, it is crucial in microgravity.
By using the solid fuel total emittance and total absorptance as parameters,
systematic computations have been performed to isolate the roles of flame
radiative loss to the ambient, absorption of flame radiation by the solid and
solid emission. Computations show that depending on the values of the solid
radiation parameters, trend reversals in spread rate and extinction limits
between flames in normal gravity and in microgravity can occur. |
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ISSN: | 0022-1481 1528-8943 |
DOI: | 10.1115/1.1773196 |