Kinetic mechanisms for the initiation of supersonic combustion of a hydrogen-air mixture behind a shock wave under the excitation of molecular vibrations in initial reagents

Mechanisms for the initiation of autoignition in hydrogen-air mixtures in a supersonic flow behind a shock at temperatures ≤700 K when the H₂ and N₂ molecule vibration is selectively excited are considered. By exciting molecular vibration in the gases, one can initiate detonation combustion behind the shock front even at weak shocks at gas temperatures ≤500 K. It is established that even a small (<0.15%) amount of vibrationally excited ozone present in the reacting mixture may considerably shrink the induction zone.