Irregular and cellular wave structures in the combustion of porous media under conditions of natural gas infiltration

Abstract

The experimental results on the unsteady propagation of cellular waves during the infiltration-controlled combustion of a titanium powder layer are presented. The modes of frontal combustion of a porous medium with a nonuniform thermal structure that arise because of the loss of stability of the front under conditions of controlled gas transport into the exothermic reaction zone are examined. The conditions of transformation of an irregular combustion front into a cellular combustion wave are determined. The effects of the key thermal parameters of the heterogeneous system on the structure of the irregular and cellular fronts and on the characteristics of the oscillatory dynamics of their propagation are examined.