Dielectric barrier discharge plasma exciter and system

A dielectric barrier discharge and plasma technology, applied in the direction of plasma, electrical components, etc., can solve problems affecting the performance and life of insulating media, destroying actuators, etc., to improve flow control performance, optimize control parameters, and high wall jet velocity Effect

Inactive Publication Date: 2014-12-03
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although increasing the input voltage can increase the velocity of the wall jet, but too high input voltage will affect the performance and life of the insulating medium, and even destroy the exciter

Method used

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  • Dielectric barrier discharge plasma exciter and system

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Effect test

Embodiment 1

[0022] This preferred embodiment provides a dielectric barrier discharge plasma actuator. Such as figure 1 As shown, the actuator at least includes a dielectric body 1 made of insulating material, a first electrode 11 disposed on the surface of the dielectric body 1 , and a second electrode 12 and a third electrode 13 disposed inside the dielectric body 1 . The first electrode 11 , the second electrode 12 and the third electrode 13 are parallel to each other. Under the action of high-frequency high-voltage alternating current between the first electrode 11 and the second electrode 12, the gas discharge generates high-density plasma, and the ions in the plasma obtain a tangential velocity under the strong tangential electric field formed by the third electrode 13, Ions transfer energy to gas molecules through collisions, thereby increasing the wall jet velocity. The above-mentioned high-density plasma preferably has a density higher than 1012 cm-3.

[0023] Among them, the f...

Embodiment 2

[0032] This preferred embodiment provides a dielectric barrier discharge plasma actuator, the structure of which is basically the same as that of the first preferred embodiment. The exciter at least includes a dielectric body made of insulating material, a first electrode arranged on the surface of the dielectric body, and a second electrode and a third electrode arranged inside the dielectric body. The first electrode, the second electrode and the third electrode are parallel to each other. Wherein, the first electrode and the second electrode constitute the first segment, and the second electrode and the third electrode constitute the second segment.

[0033] The difference is: the configuration of the power supply is dual power supply with the same frequency and opposite phase. The first electrode is connected to the first AC voltage source, the third electrode is connected to the second AC voltage source, and the first AC voltage source and the second AC voltage source ha...

Embodiment 3

[0036] This preferred embodiment provides a dielectric barrier discharge plasma actuator, the structure of which is basically the same as that of the first preferred embodiment. The exciter at least includes a dielectric body made of insulating material, a first electrode arranged on the surface of the dielectric body, and a second electrode and a third electrode arranged inside the dielectric body. The first electrode, the second electrode and the third electrode are parallel to each other. Wherein, the first electrode and the second electrode constitute the first segment, and the second electrode and the third electrode constitute the second segment.

[0037] The difference is: the configuration of the power supply is dual power supply and dual frequency. The first electrode is connected to a first AC voltage source with high frequency, the third electrode is connected to a second AC voltage source with a frequency lower than the first AC voltage source, and the second elec...

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Abstract

The invention discloses a dielectric barrier discharge plasma exciter and system, belongs to the field of a plasma exciter and is designed to solve the problem of low wall jet speed of a conventional device. The dielectric barrier discharge plasma exciter at least comprises a medium body, a first electrode arranged on the surface of the medium body, and a second electrode and a third electrode which are arranged in the medium body, wherein the first electrode, the second electrode and the third electrode are parallel mutually; high-density plasma can be produced between the first electrode and the second electrode; and the third electrode is used for improving the wall jet speed. The dielectric barrier discharge plasma exciter system comprises at least two groups of same exciters above. The dielectric barrier discharge plasma exciter and system can carry out independent control and organic unification on production and pneumatic excitation of plasma, so that the flow control performance of the plasma exciter is improved; and the dielectric barrier discharge plasma exciter and system are wide in application range, and are especially suitable for the field of flow control of the a wing / an engine.

Description

technical field [0001] The invention relates to a dielectric barrier discharge plasma exciter and a dielectric barrier discharge plasma exciter system composed of at least two identical exciters. Background technique [0002] The dielectric barrier discharge plasma actuator is a cutting-edge active fluid control technology, which can effectively improve the aerodynamic characteristics of the wing and power plant, and achieve the purpose of increasing lift / reducing drag. [0003] The main structure of the basic unit of the existing dielectric barrier discharge plasma actuator is a double-electrode single-stage dielectric barrier discharge structure. Specifically, it includes two metal electrodes arranged in parallel, one electrode is embedded in a dielectric with good insulation performance, and the electrode is grounded; the other electrode is arranged on the surface of the insulating material and exposed to the ambient atmosphere, and AC high voltage is input through the el...

Claims

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Application Information

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IPC IPC(8): H05H1/24
Inventor 李江王光秋
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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