Thermal Structure of the Filtration Combustion Wave of CaH2 in a Flow of a SiF4 + H2 Mixture

The head and wake waves of filtration combustion of calcium hydride in a flow of a mixture of silicon tetrafluoride and hydrogen at silicon tetrafluoride weight fractions of 0.8, 0.85, 0.9, and 0.98 were studied. The spatial profiles of the combustion waves were constructed. With their aid, the thermal structure of the head and wake waves was found, and the width of each zone in the combustion wave for different compositions of the gas phase was determined. With increasing concentration of the reagent gas in the flow, the reaction zone width increases in the head wave and decreases in the wake wave. The structure of the head wave corresponds to the intermediate combustion wave, and the structure of the wake wave, to the normal combustion wave.