Dielectric barrier discharge plasma exciter with mesh-shaped structure

Abstract

The invention discloses a dielectric barrier discharge plasma exciter with a mesh-shaped structure, which is characterized in that an exciter electrode is of a mesh-shaped structure woven by superfinemetal wires, and the metal wire mesh electrode is connected with the high-voltage end of a high-voltage power supply; the surface of the metal wire mesh electrode is smooth without burrs, the electrode discharge area range is large, the discharge is uniform, breakdown is not prone to happening, and the service life of the dielectric barrier discharge plasma exciter can be effectively prolonged. When the dielectric barrier discharge plasma exciter is mounted on a metal pattern die, the metal film electrode is directly connected with a low-voltage end of the high-voltage power supply. The influence of the extremely fine metal wires on the surface of the metal pattern die on the surface of the pattern die is very small, and the mounting of the exciter on the high-precision pattern die can effectively improve the flow control efficiency of the plasma exciter, and the interference of the plasma exciter on controlled flow is reduced. The voltage and the frequency of the high-voltage power supply are adjustable. The metal wire mesh electrode and the metal film electrode are separated through an insulating dielectric layer, the metal wire mesh electrode is kept in a tightened state duringmounting and fixing, the fixing mode is simple, and the mounting is easy.

Description

technical field [0001] The invention relates to the technical field of plasma flow control, in particular to a dielectric barrier discharge plasma exciter with a mesh structure. Background technique [0002] Dielectric barrier discharge (DBD) can form stable plasma and is widely used in plasma flow control. The dielectric barrier discharge plasma actuator has the characteristics of simple structure, convenient installation, high energy consumption ratio, and fast response speed, which has attracted more and more attention in the field of flow control. Good results have been achieved in many fields of airfoil separation flow. The dielectric barrier discharge plasma is mainly composed of exposed electrodes, buried electrodes and insulating dielectric layers, wherein the exposed electrodes are exposed to the air, the buried electrodes are wrapped in the insulating medium, and the exposed electrodes and the buried electrodes are separated by the insulating dielectric layer. Ap...

AI Technical Summary

Problems solved by technology

[0004] Invention patent CN101784155B and patent CN203554775U disclose a dielectric barrier discharge plasma exciter. The exposed electrodes are rectangular metal films. In practical applications, the upper and lower electrodes and insulating layers are pasted on the surface of the model. For example, the shape of the airfoil and the surface of the wing has a great influence, and even affects its aerodynamic performance.

In addition, when pasting the upper and lower electrodes, the unavoidable small burrs on the edge will generate tip discharge, which is very prone to breakdown and cause damage to the plasma DBD exciter and cannot work normally

[0005] In practical applications, the use of exposed and hidden electrodes and insulating layers attached to the surface of the airfoil has a great impact on various airfoils and wing surface shapes, especially affecting its aerodynamic performance, and because the discharge excitation area is limited to hidden The area above and near the metal thin film electrode has a limited range of flow control, so there is an urgent need for a new type of plasma actuator that can realize plasma flow control in a large area without changing the aerodynamic shape of the aircraft.

Existing dielectric barrier discharge plasma actuators use metal thin films, which have a short service life and are prone to tip discharges at the edges. Installation on the model will affect the surface shape and aerodynamic performance of the model, and the plasma excitation area is small.

Images