The experimentally known phenomenon of spontaneous transition from slow conductive to fast penetrative (convective) burning in a confined gas-permeable explosive is discussed. A reduced quasilinear model, involving only the most essential physical ingredients, is formulated. A good qualitative agreement between theoretical and experimental dependencies is obtained. Similar to the previously studied case of an inert porous matrix filled with an explosive gas, the transition is triggered by a localized autoigni…
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