Novel dielectric barrier discharge plasma exciter

Abstract

The invention discloses a novel dielectric barrier discharge plasma exciter, which adopts an extremely thin metal wire as an upper electrode, wherein the metal wire upper electrode is connected to thehigh voltage end of a high-frequency high-voltage power supply, and the surface of the metal wire upper electrode is smooth and burr-free, with uniform discharge, no tip discharge and uneasy breakingdown, which can effectively extend the service life of the plasma exciter. When mounting on a metal model, the metal model is directly used as a lower electrode, the metal film lower electrode is connected to the low-voltage end of the high-frequency high-voltage power supply, the extremely thin metal wire on the surface of the model has little influence on the surface of the model, and the exciter is mounted on the model of high-precision shape to avoid interference with the shape without affecting its aerodynamic performance. The voltage and frequency of the high-frequency high-voltage power supply are adjustable, the metal wire upper electrode and the metal film lower electrode are separated by an insulating dielectric layer, and the metal wire upper electrode keeps in a tight state during installation and is fixed by the insulating countersunk screw, which is simple and reliable in arrangement, and easy to install.

Description

technical field [0001] The invention relates to the technical field of plasma flow control, in particular to a novel dielectric barrier discharge plasma actuator. Background technique [0002] The dielectric barrier discharge plasma actuator has many characteristics such as simple design, no moving parts, easy installation, high energy consumption ratio, and fast response speed, which makes it attract more and more attention in the field of flow control. It has achieved very good results in many fields such as increasing lift and reducing drag, and airfoil separation flow. The dielectric barrier discharge plasma is mainly composed of exposed electrodes, buried electrodes and insulating dielectric layers, in which 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. High-frequency high-voltage alternating current is appl...

AI Technical Summary

Problems solved by technology

[0003] In the Chinese patent CN101784155B and the invention patent CN203554775U, a dielectric barrier discharge plasma actuator is disclosed. The exposed electrodes are all rectangular metal films. In practical applications, the upper and lower electrodes and insulating layers are attached to the surface of the model. Various models such as airfoil and wing surface shape have a great influence, and even affect 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

[0004] The existing published literature "Research Progress and Prospect of Plasma Flow Control [J]" (Acta Aeronautica Sinica, 2015, 36(2): 381-405) The dielectric barrier discharge plasma actuator introduced in this article is due to the use of metal thin film on the upper electrode. , the edge will inevitably have burrs, which will easily lead to tip discharge, and its service life is low, and the installation on the model will affect the surface shape of the model and affect the aerodynamic performance

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