Detonation initiation from a deflagration wave interacting with fence-type obstacles

Experiments were performed in an 80 mm square channel to study the transition of a unique shock flame complex to detonation in stoichiometric hydrogen-oxygen mixture. The shock flame complex structures were generated at the end of the first 2.48 m smooth-walled channel, and deflagration-to-detonation transition (DDT) occurred in the following 0.63-m long test section with fence-type obstacles on bottom wall. High-speed schlieren, pressure sensors, and soot foils were used to identify the flame s