FORMATION OF DETONATION WAVES IN FLOWING COMBUSTIBLE GASEOUS MIXTURES.
Final rept. for 1 Dec 62-31 Jan 65,
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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Detonation induction distances were measured in hydrogen-oxygen and methane-oxygen mixtures flowing at various velocities through a 9 stainless steel tube, 9 mm inside diam. The linear flow velocities of the gas mixture ranged from 0-100 msec in hydrogen-oxygen mixtures. Some experiments were conducted at 5 atm initial pressure. Experiments with methane-oxygen mixtures were carried out at 1 atm only the initial velocities of these mixtures ranged from 0-30 msec. It was found that the formation of detonation waves in flowing combustible gaseous mixtures is dependent upon the initial pressure and the intensity of turbulence present in the gases. As the initial pressure is raised, the effect of turbulence becomes less pronounced. Higher turbulence levels cause an effective decrease in the quenching diam as indicated in these experiments. Higher flow rates for a methane-oxygen mixture 50 per cent fuel insure positive ignition and positive measurement of flame propagation rates. Author