Effect of heating on the structure and existence limits of the combustion front in two-layer specimens

The thermal and concentration structures of the combustion front in two-layer specimens are studied using the methods of mathematical modeling. The combustion limits are determined for various thermal effects and thermophysical characteristics of the layers on the basis of heat losses. Increasing the temperature of the medium in which a specimen is placed is shown to be an effective method of controlling the combustion process. It is established that, for the values of the determining parameters used in the calculations, increasing the temperature by one characteristic interval $T_{env,1} = T_{in} + RT^2_{b,1}/E$ ($T_{in}$ is the initial temperature of the specimen and $T_{b,1}$ is the combustion temperature of the undiluted layer) increases the critical value of the heat-loss coefficient by more than twentyfold.