Abstract. Detonation and deflagration initiation under focusing conditions in a lean hydrogen-air mixture was experimentally investigated. The experiments were carried out in a shock tube equipped with the laser schlieren system and pressure transducers. Two-dimensional wedges (53° and 90°), semi-cylinder and parabola, were used as the focusing elements. The peculiarities of mild and strong ignition inside the reflector cavity were visualized. A hydrogen-nitrogen mixture was taken for comparison between reactive and inert mixture. It was found that mild ignition inside the reflector cavity can lead to detonation initiation outside the cavity. Schlieren pictures of the process were obtained and the dependence of the distance of detonation initiation on Mach number of the incident shock wave was established.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Author information
Authors and Affiliations
Additional information
Received 30 August 1999 / Accepted 23 February 2000
Rights and permissions
About this article
Cite this article
Gelfand, B., Khomik, S., Bartenev, A. et al. Detonation and deflagration initiation at the focusing of shock waves in combustible gaseous mixture. Shock Waves 10, 197–204 (2000). https://doi.org/10.1007/s001930050007
Issue Date:
DOI: https://doi.org/10.1007/s001930050007