A PROGRAM TO ADVANCE THE TECHNOLOGY OF FIRE EXTINGUISHMENT (HYDROGEN-OXYGEN).
Abstract:
The second years effort for first years work see ASD-TDR-62-526 included the study of 1 suppression of gaseous hydrogen-oxygedetona tions, 2 methods for controlling liquid hydrogen combustion, and 3 extinguishment of liquid hy dro-gen-metal slurry fires. Of several gaseous inhibitors for 6238 by volume mixtures of hydrogen and oxygen, isobutene was found to be the best from evaluations of several low-molecu lar-weight alkanes and alkenes, acetylene, methyl halogenides, chlorine, and pentacarbonyl iorn. Isobutene was effective at a concentration of 1. Confined liquid hydrogen combustion was effective ly suppressed by air-halogenated hydrocarbon mix tures with 13-65 of inhibitor. It was also shown that effective concentrations can be predicted from standard flammability data. Con fined liquid hydrogen combustion was extinguished by either powdered solids or liquid agents. Po tassium bicarbonate and halogenated hydrocarbons were most effective of the substances studied. Minimum amounts for extinguishing fires of liquid hydrogen buring at a rate of 1hr ranged from 0.5 to 0.8 gram. Author