Ignition and unstable regimes of gasless combustion of a disk-shaped sample

The effect of ignition conditions and the parameters of the melting of the inert component on unstable combustion modes was studied numerically using a model for the solid-state combustion of a disk. It is shown that the shape of the heated zone initiating combustion of the disk, determines the number and trajectories of zones of self-propagating combustion zone. The effect of the phase transition on the combustion characteristics is the more pronounced the closer the phase transition temperature to the combustion temperature. In this case, the combustion front takes the shape of a ring.