Parameters of detonation of hydrogen-air mixtures with partly dissociated components

Numerical data on chemically equilibrium parameters of detonation of a stoichiometric hydrogen-air mixture and the same mixture with partly dissociated components are reported. It is found that the dissociated components (hydrogen, oxygen, and nitrogen atoms) produce a significant effect on the system parameters, especially on reduction of the critical energy of detonation initiation. As the fraction of atomic nitrogen in the hydrogen-air system increases, its explosion hazard also increases, and the initiation energy becomes even smaller than the critical energy of detonation initiation in the hydrogen-oxygen mixture. The system parameters for heated air are analyzed.