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.
A Computational Study on Flame-Solid Radiative Interaction in Flame Spread Over Thin Solid-Fuel
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division February 28, 2003; revision received March 17, 2004. Associate Editor: S. T. Thynell.
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Kumar , A., Tolejko , K., and T’ien, J. S. (March 17, 2004). "A Computational Study on Flame-Solid Radiative Interaction in Flame Spread Over Thin Solid-Fuel ." ASME. J. Heat Transfer. August 2004; 126(4): 611–620. https://doi.org/10.1115/1.1773196
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