EXPERIMENTAL STUDIES ON SUPERSONIC COMBUSTION PHENOMENA OF CO-O-2-H-2PREMIXED GASES AROUND HYPERSONIC PROJECTILES

Hypersonic projectiles were fired into CO-O-2 and CO-O-2-H-2 gas mixtu res. For observation of combustion phenomena around the projectiles, w e employed a highspeed framing schlieren technique. When we used CO-O- 2 mixtures as combustible gases, no shock-induced combustion was obser ved. However, addition of a small amount of H-2 into the CO-O-2 mixtur es enabled combustion. We experimentally investigated the dependence o f combustion phenomena on the molar fraction of H-2 in the CO-O-2-H-2 gas mixtures. The high-speed framing schlieren technique made it possi ble to observe and discuss unsteady shock-induced combustion phenomena .