Supersonic combustion chamber plasma ignition device and method based on boundary layer air entraining

The invention discloses a supersonic combustion chamber plasma ignition device and method based on boundary layer air entraining, the device comprises a pre-combustion chamber, a bluff body stabilizer, an oil injection supporting rod, a plurality of sliding arc plasma exciters and a concave cavity, the pre-combustion chamber serves as a bypass and communicates with a supersonic combustion chamber through the concave cavity; one part of each sliding arc plasma exciter is arranged in the pre-combustion chamber, and the other part of each sliding arc plasma exciter is arranged in the concave cavity; air inlet channel boundary layer suction and supersonic combustion chamber ignition starting are combined, airflow and energy of a boundary layer are fully utilized, high-temperature fuel gas of a pre-combustion chamber is utilized, and ignition starting and stable combustion of the supersonic combustion chamber are further assisted through plasma excitation; repeatable ignition of the scramjet engine can be achieved