High-Altitude Explosion Properties of the Hydrogen-Oxygen System in Vented Tanks
One of the problems which concerns the man-rating of a vehicle such as the Saturn is the evaluation of the explosion or detonation hazard arising in the interstage from the presence of liquid and/or solid hydrogen and oxygen. This situation can arise because of leakage, engine chill-down and conditioning or rupture of feed lines, etc. at altitudes above 60,000 ft. Results of a previous program have already been reported  in which the effect of ambient pressure, mixture ratio, ignition source and confinement on the ignition and reaction phenomena of the condensed phase hydrogen-oxygen system were studied.
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