Abstract

One of the fundamental problems to be studied on a Pulse Detonation Engine (PDE) is the deflagration to detonation transition (DDT). For the development of the PDE, it is essential to shorten a distance of detonation transition that is called a detonation induction distance (DID). We carried out an experimental study of DDT in a narrow channel with height of 1-5mm by using pressure and soot track records in oxyhydrogen mixtures. Detonation limits was discussed according to height of tube and equivalence ratio. According to pressure history and soot track record, detonation velocity, DDT process and DID was discussed. Over driven detonation and attenuated detonation was observed in the narrow channel. DID that measured by soot track record applied to experimental formula for oxygen and hydrogen system.

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