Abstract

The authors study the detonation of two liquid hydrocarbon fuels, two oils, glycerine and two oxidizers--oxygen and air--in systems with bubbles where the detonation is initiated by the pressure exerted by a detonation wave propagating through the system. They use photography, oscillography, and mathematical simulation to assess the effects of viscosity, pressure, and hydrodynamics on the wave propagation and ignition process in the shock tube, and conclude that an increase in the initial bubble volume and initial pressure and a decrease in bubble diameter all tend to increase the detonation wave amplitude, whereas an increase in viscosity and a reduction in the ignition induction period work to reduce the amplitude. Detonation wave velocity was also found to be influenced by these parameters. The results held true for all systems studied and are therefore assumed to be general phenomena.

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