Abstract
Collapses of detonation configurations due to interaction with the Prandtl-Meyer expansion and behavior of disturbances in regions losing the characteristic fish-scale pattern were experimentally observed, using a channel with two rectangular blockages and an equimolar gas mixture of oxygen and acetylene. As optical measurement methods, pulse laser schlieren photography was utilized for wavefront structures of detonations or existing various disturbances, and open-shutter photography was used for comprehensive propagation behavior based on emission trajectories of triple shock waves. It was found that at the initial pressure of 13KPa, reestablishment of detonation was obtained after passing through the second blockage arranged in the channel.
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