A kind of air cooling device and plasma generator for plasma generator

Abstract

The present invention relates to an air-cooled device and a plasma generator for a plasma generator. The air-cooling device comprises an air-cooling device body and a mounting cavity for mounting a discharge tube of a plasma generator. The air-cooling device body comprises an inner shell and an outer shell. The mounting cavity is surrounded by an inner wall surface of the inner shell. A cavity isarranged between the outer shell and the inner shell, and the cavity forms a cooling air cavity; At least one air inlet hole for supply that cooling gas into the cool gas chamber is arranged on the housing, one end or both ends of the inner shell and the air-cooling device body are provided with a plurality of jet holes for discharging the cooling gas in the cooling gas chamber, The opening axes of the plurality of jet holes are respectively arranged at different angles with respect to the axial direction of the mounting chamber, so that the cooling gas discharged from the plurality of jet holes can be discharged to different positions of the discharge tube at different angles. The air cooling device of the invention has high cooling efficiency and uniform cooling, and can ensure efficientand stable operation of the plasma generator.

Description

technical field [0001] The invention belongs to the technical field of plasma wind tunnel tests, and in particular relates to an air cooling device for a plasma generator and the plasma generator. Background technique [0002] The principle of high-frequency induction heating equipment (such as a plasma generator) is based on the phenomenon of Faraday electromagnetic induction. The high-frequency alternating current output by the high-frequency power supply is used to generate an alternating magnetic field, and the thermal effect of the induced eddy current generated by the alternating magnetic field To heat the workpiece, it has the advantages of high heating efficiency, fast speed and good controllability. The key to this heating process is the conductivity of the workpiece to be heated. When the workpiece is a solid, it is usually a conductor such as metal, which has good electrical conductivity; when the workpiece is a gas, the gas will first be ionized under the action ...

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Problems solved by technology

However, these two cooling devices for plasma generators have a certain magnetic hysteresis due to the water in the double-layer quartz tube or the copper cage and the water in the copper cage, which will consume a part of the power supply and reduce the plasma generation. In addition, the double-layer quartz tube structure or copper cage structure increases the gap between the induction coil and the load gas, weakens the coupling between the two, increases the equivalent impedance, and reduces the tunable range of the system

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