Impact of structural factors on unsteady combustion modes of gasless systems

Based on the two-temperature, two-velocity time-dependent model of gasless combustion, taking into account structural transformations related to the force action of the gas filtering in the pores and vitrification and volume variation of the condensed phase during the chemical transformation, self-oscillatory combustion modes are studied. Structural transformations are shown to have a pronounced effect on the propagation pattern of combustion waves and can either stabilize or destabilize combustion. The major structural parameters appreciably affecting combustion-wave stability are the initial porosity, particle size, and pressure.