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Ignition, Transition, Flame Spread in Multidimensional Configurations in Microgravity.


pdf icon Ignition, Transition, Flame Spread in Multidimensional Configurations in Microgravity. (2499 K)
Kashiwagi, T.; Mell, W. E.; McGrattan, K. B.; Baum, H. R.; Olson, S. L.; Fujita, O.; Kikuchi, M.; Ito, K.

NASA Conference Publication 10194;

Microgravity Combustion Workshop, Fourth (4th) International. Proceedings. National Aeronautics and Space Administration, Lewis Research Center. NASA Conference Publication 10194. May 19-21, 1997, Cleveland, OH, 411-416 pp, 1997.

Keywords:

microgravity; combustion; flammability; flame spread; ignition; smoldering

Abstract:

Ignition of solid fuels by external thermal radiation and subsequent transition to flame spread are processes that not only are of considerable scientific interest but which also have fire safety applications. A material which undergoes a momentary ignition might be tolerable but a material which permits a transition to subsequent flame spread would significantly increase the fire hazard in a spacecraft. Therefore, the limiting condition under which flame cannot spread should be calculated from a model of the transition from ignition instead of by the traditional approach based on limits to a steady flame spread model. However, although the fundamental processes involved in ignition have been suggested there have been no definitive experimental or modeling studies due to the flow motion generated by buoyancy near the heated sample surface.