Microheterogeneous mechanism of gasless combustion

A model for gasless combustion is considered, based on the assumption that the medium consists of reaction cells whose exchange with heat proceeds much more slowly than heat transfer in each cell. For various reaction rates and kinetic laws, temperature dependences of the burning rate are calculated and compared with available experimental data. Thermal and concentration structures of the combustion wave are revealed. Existence domains and stability boundaries of microheterogeneous and quasihomogeneous modes of gasless combustion are established, depending on the preexponent and activation energy of the chemical reaction. The effect of abrupt acceleration of the reaction at a critical point (for instance, at a phase-transition point) on the combustion pattern is analyzed.