FLAME PROPAGATION IN POROUS-MEDIA WETTED WITH FUEL

Some specific features of flame propagation over a gas mixture with a very low value of enthalpy have been studied experimentally in an evap orative-diffusive regime in various porous media. The combustion wave is shown to propagate steadily in a high-porosity medium wetted with n -octane at velocities of 3-10 cm/sec. We have also studied the effect of the volumetric heat capacity and thermal conductivity of the materi al of a porous medium on the velocity and characteristics of flame pro pagation both in a high-velocity regime for high-enthalpy gas mixtures and in a low-velocity regime for low-enthalpy ones. The existence con ditions of an evaporative-diffusive regime have been considered.