Abstract
The mechanism of mathane-air combustion on the surface of a porous ceramic plate was studied by experimental testing and analysis of a simplified theoretical model based on one-dimensional flow of methane-air mixture and the overall chemical reaction rate.
The effects of such parameters as thickness of porous ceramic plates, equivalence ratio of mixed-gas and heat load on the combustion characteristics were examined.
A thicker plate achieves higher surface temperature as premixed gas is preheated on the porous ceramic plate. The combustion zone is closest to the porous ceramic plate with equivalence ratio Φ = 1.2. The surface temperature has peak value at a certain heat load. It is observed that combustion begins just off the porous ceramic plate, and the flame is kept less than 1 mm from the surface. The position is influenced by the combustion conditions. These phenomena can be explained by a theoretical model and such aspects of the combustion mechanism as temperature profile of premixed gas and porous plate and chemical reaction on the plate are made clear.
