Flame Propagation in Porous Media Wetted with Fuel in an Oxygen-Rich Gas Phase

Flame propagation over a liquid fuel film on a solid substrate was experimentally studied under conditions where the liquid vapor pressure is below the lean limit and the solid consists of grains of a porous medium. The flame propagated at a speed of the order of the normal flame speed of the homogeneous stoichiometric mixture. The effects of the characteristic element size of the porous medium and the oxygen concentration in the gas phase on flame speed in porous media wetted with $$n$$ -butanol were experimentally investigated.