Nonuniqueness of stationary states in combustion of mixtures of zirconium and soot powders in hydrogen

This article attempts to clarify the question of the existence of the nonuniqueness of regimes accompanying the combustion of a three-component system of zirconium-carbon-hydrogen. Values of the rates and temperatures of combustion, as well as the phase composition of combustion products of mixtures of zirconium with soot for three different cases of ignition, are presented. The results indicate that all the compositions investigated burn in the low-temperature regime with the formation of zirconium hydrides. It is concluded that the theoretically predicted nonuniqueness of stationary regimes of combustion and the critical transition from the high-temperature regime to the low-temperature regime using ignition sources with different temperature can be observed experimentally in the combustion of zirconium-carbon-hydrogen systems.