Abstract
The results of a study of the space-time characteristics of the freely localized discharge created in air by a focused microwave beam and the microwave discharge on external surface of dielectric body being flown around of supersonic stream of air are presented. The ignition of supersonic flow of a propane-butane-air mixture with use of freely localized microwave discharge and surface microwave discharge was experimentally investigated. It was shown, that the microwave discharges result in a reliable ignition of hydrocarbon fuel. For finding-out of influence of different channels of energy transfer on ignition of combustible mixtures in supersonic flow the kinetical model was working out. The calculations demonstrate that at low initial gas temperature the induction time of H2-O2 mixture decreases on some times at taking into account of molecules dissociation and creation of radicals and active excited and charged particles under conditions of non-equilibrium gas discharge plasma. The numerical modelling of process of streamlining of different geometry bodies by supersonic airflow was fulfilled at various values of energy introduced into boundary layer.
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