Device and method for controlling radio frequency jet flow length through auxiliary discharge

Abstract

The present invention discloses a device and a method for controlling radio frequency jet flow length through auxiliary discharge. The device is a dielectric barrier discharge plasma reactor and comprises a discharge cavity filled with discharge gases, one end of the discharge cavity is provided with an air inlet, the other end of the discharge cavity is provided with an air outlet, the dischargecavity is provided with a high-voltage electrode, a grounding electrode and a radio-frequency electrode in order in a gas flow direction. The method comprises the steps of: inletting the discharge gases into the discharge cavity through the air inlet, the radio-frequency electrode is connected with a radio-frequency alternating current to allow the discharge gases to generate plasma jet between the grounding electrode and the radio-frequency electrode, and the high-voltage electrode is connected with a high-voltage source to generate the plasma jet between the high-voltage electrode and grounding electrode. The device and the method for controlling radio frequency jet flow length through auxiliary discharge can effectively add the radio-frequency discharge intensity and the length of the radio frequency jet and can change the intensity of the pulse plasma so as to achieve change of the length of the radio frequency jet.

Description

technical field [0001] The invention relates to the technical field of atmospheric pressure glow discharge, in particular to a method for atmospheric pressure pulse coordinated radio frequency glow jet discharge. Background technique [0002] The plasma jet is a kind of plasma generated in a small discharge space, and the plasma is driven by various excitation sources to reach the external open space through the nozzle. Compared with the traditional plasma, the plasma jet has the following characteristics and advantages: [0003] (1) The plasma jet device under atmospheric pressure is simple, does not need to draw a vacuum, and can generate plasma with uniform discharge under atmospheric pressure. [0004] (2) Plasma close to room temperature can be generated in an open space, instead of being confined in a narrow discharge space like traditional atmospheric pressure plasma generation methods (such as capacitive coupling discharge, etc.). [0005] The plasma generated at t...

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Problems solved by technology

[0006] Traditional RF plasma jets are usually composed of single or double electrodes, and the RF jet distance generated at the nozzle is short, which limits the effect of RF jets

In most cases, the method of increasing the length of the plasma jet is by increasing the flow rate of the discharge gas, which consumes a large amount of carrier gas

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