NEW RESULTS IN THE THEORY OF FILTRATION COMBUSTION

Approximative analytical as well as numerical techniques have been used to study the propagation of a heterogeneous chemical transformation autowave in a dissociating system with filtration of a gas mixture containing an active reaction component. The interaction of heat and reaction waves combined with dissociation results in a complex two-front combustion wave structure with two reaction zones. For simple situations, practically important wave characteristics are estimated analytically. It is shown that filtration combustion of dissociating systems can concentrate energy in the reaction zone by transport gases from the hot product region to the reaction zone. This is referred to as the superadiabatic effect. In contrast to nondissociating system, in which the superadiabatic effect causes a temperature rise in the reaction zone, in dissociating system it causes a decrease in the depth of conversion to product.