Convective regime of filtration combustion of energetic materials in a cocurrent flow of their combustion products

The convective regime of filtration combustion of energetic materials in a cocurrent flow of their combustion products is studied using a model with e xtremely simplified kinetics and heat transfer, which shows instability of the process. It is shown that the more accurate "two-temperature" model des cribes a steady-state regime. In this regime, the gas temperature on the "h ot" boundary of the heating zone is well below the combustion temperature, and the solid-phase temperature is well below the temperature proposed in r ecent studies on this topic. It is pointed out that the "two-temperature" a pproach is unjustified and intragranular nonisothermicity must be taken int o account for convective regimes. It is shown that the "three-temperature" model, which takes into account this effect, does not give a stable steady- state solution.