Relay-race combustion of heterogeneous systems

The structure of a combustion front in a multilayer system is analyzed taking into account radiative heat transfer in the gas interlayer. The effect of radiative heat loss on the structure and characteristics of the relay-race transformation regime is studied. The characteristics of the front and the transformation dynamics of the elements of the discrete system are determined. For the case of heat loss to the ambient medium, it is shown that the steady-state regimes are nonunique – high-temperature and low-temperature relay-race combustion fronts are detected. The absolute instability of the low-temperature regime and the dynamics of establishment of the high-temperature regime are studied in computational experiments under unsteady conditions. It is established that there is a critical heat loss above which there is flame extinction. The change in the thermokinetic characteristics during the process is analyzed, and it is shown that during combustion superadiabatic temperatures are reached.