Structure for generating sliding arc and plasma igniter with structure

Abstract

The invention discloses a structure for generating a sliding arc and a plasma igniter with the structure. The plasma igniter comprises a structure which is arranged between a front incoming flow area and a tail ignition area and used for generating the sliding arc. The structure comprises a grounding electrode base installed on a center shaft, the air inlet end of the center shaft is sleeved with a turbine connected with the grounding electrode base, a plurality of grounding electrodes protruding outwards are distributed on the grounding electrode base located in a high-voltage electrode insulating seat, and a plurality of high-voltage electrodes protruding inwards are distributed on the high-voltage electrode insulating seat; and the high-voltage electrode insulating seat is mounted on an igniter shell through an insulating jacket. A rotary sliding arc ignition mode is adopted, and effective ignition can be achieved under the extreme conditions of a high altitude and a high speed; and the structure for generating the sliding arc is matched with the turbine, it can be guaranteed that incoming flow is placed in an electric field, the discharge efficiency can be effectively improved through rotation of the grounding electrodes, it is guaranteed that the incoming flow makes full contact with the arc, and therefore the ignition success rate is increased.

Description

technical field [0001] The invention relates to the technical field of plasma ignition, in particular to a structure for generating a sliding arc and a plasma igniter with the structure. Background technique [0002] Gliding arc plasma discharge is a plasma generation method between hot plasma and cold plasma, and has the characteristics of both hot plasma and cold plasma. This feature determines that the sliding arc plasma has a relatively high temperature and can be used in fields requiring high temperature effects such as ignition and combustion; moreover, most of its energy (75% to 80%) is consumed in the non-thermal equilibrium stage, and has a large amount of energy. High-energy electrons and good chemical selectivity, so sliding arc discharge also has important application value in plasma reforming and other fields. [0003] At present, the main sliding arc plasma discharge mostly adopts blade electrode and rotating sliding arc. Among them, the blade electrode is of...

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Problems solved by technology

[0005] The prior art discloses the application of sliding arc in plasma igniter, such as ① Chinese invention patent application number: 201911272687.3, name: multi-anode sliding arc plasma igniter and ignition method based on secondary flow in combustion chamber; ② China Invention patent application number: 201911272688.8, name: a multi-cathode sliding arc plasma igniter; ③ Chinese invention patent application number: CN201711225205.X, name: aero-engine plasma jet igniter based on self-entrained air; ④ Chinese utility model Patent application number: CN109057972A, name: a pre-combustion type aircraft engine plasma igniter; the above schemes all use plasma to assist ignition to achieve reliable ignition under harsh conditions, and the advantage is that it can improve the lean combustion of fuel during ignition Limit, the disadvantage is that the arc energy generated during ignition is not very sufficient and cannot be adjusted

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