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Combustion Behavior Due to Hydrogen Leakage Under Porous Combustibles of Ceiling
Technical Paper
2009-08-0468
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
The hydrogen concentration during combustion was investigated under the ceiling with porous combustibles. The results indicated that the steady-state hydrogen concentration at ceiling surface was the highest in the ceiling material regardless of the hydrogen flow rate. When the hydrogen concentration was about 10-20% at ceiling surface, instabilities of the propagating flame front might be repeated in the layer just under the ceiling surface for a while, and the material becomes easily burned starting from the point with the concave portion in the porous combustibles of the ceiling. The cause of instabilities of a propagating flame front was considered from the relation between the temperature and the hydrogen concentration.