Pulse detonation engine with its high efficiency, high specific impulse, thrust become an important development direction of military aircraft power system, detonation initiation and maintenance very difficult, how fast and effectively detonate stable pulse detonation wave is fully developed Pulse detonation engine one of the most important key technologies. In recent years, plasma ignition and auxiliary - an auxiliary combustion at home and abroad have been widely studied.

  Assisted chemical reaction mechanism for the study of plasma combustion, numerical simulation of hydrogen - oxygen gas mixture in the ac excitation dielectric barrier discharge process, consider including O +, 2O +, + 2H, H + 4 specific positive charged particles, electrons, O- , 17 kinds of components 2O-, 3O-, OH-, H-6 种 negatively charged particles, as well as O, O2, O3, H2, H, OH, H2O 7 kinds of representative neutral particles, etc., 47 kinds of the reaction, in order to analyze the discharge Time and space characteristics of the product and the gas pressure.

  The results showed that: O and H atoms in plasma-assisted combustion is the main active ingredient, 2O +, OH and OH- also have some impact; O atom density throughout the discharge cycle changes little, H atom density varies with time difference of two orders of magnitude above; as the pressure decreases, ionization degree after O and H atoms first increases and then decreases, 0.8P0 (P0 = 1.01325 × 105Pa) the highest; from the high voltage electrode to the ground electrode, the ionization of O atoms decreases, H atom ionization degree after the first increases and then decreases, the maximum value near the center of the discharge area.

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