Abstract
Detonation induction distances were determined in a 9-mm (i.d.) detonation tube at an initial pressure of 1 atm at ambient temperature for hydrogen-oxygen mixtures flowing at initial velocities ranging from 0-100 m/sec, and for methane-oxygen mixtures flowing at velocities from 0-30 m/sec. Some experiments with hydrogen-oxygen mixtures were conducted at 5 atm initial pressure. The induction distances for hydrogen-oxygen mixtures decrease linearly with the logarithm of the Reynolds number based on the initial linear gas velocity. Results show that the induction distance of the detonation wave propagating upstream is shorter than that of the wave propagating downstream. Induction distances in methane-oxygen mixtures were essentially constant over the range of flow velocities employed. Certain observations seem to indicate that higher turbulence levels in the initial gas flow cause an effective decrease in the quenching diameter.
Published Version
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