極超音速飛行体周りにおけるCO-O2-H2予混合気体の超音速燃焼に関する実験的研究

Hypersonic projectiles were fired into CO-O2 and CO-O2-H2 gas mixtures. For observation of combustion phenomena around the projectiles, we used a high-speed framing schlieren technique. When we used CO-O2 mixtures as combustible gases, no shock-induced combustion was observed. However, addition of a small amount of H2 into the CO-O2 mixtures enabled combustion. We experimentally investigated the dependence of combustion phenomena on the molar fraction of H2 in the combustible gases. The high-speed framing schlieren technique made it possible to observe and discuss unsteady shock-induced combustion phenomena.