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Device and method for increasing induced jet velocity of surface DBD exciter

A technology of jet velocity and exciter, applied in the field of plasma technology and aerodynamics, can solve the problems of low velocity, not reaching the jet velocity, not satisfying drag reduction and circulation control, etc. The effect of increasing the jet velocity

Inactive Publication Date: 2019-09-10
AIR FORCE UNIV PLA
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Problems solved by technology

[0003] At present, the speed induced by the DBD exciter is not high, less than 10m / s
At home and abroad, studies have been carried out on the structure optimization of DBD actuators and power waveform optimization. The current DBD induction velocity has not yet reached the jet velocity required for actual aircraft / wing flow control, especially at low angles of attack. Requirements for airfoil drag reduction and circulation control

Method used

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  • Device and method for increasing induced jet velocity of surface DBD exciter
  • Device and method for increasing induced jet velocity of surface DBD exciter
  • Device and method for increasing induced jet velocity of surface DBD exciter

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0031] Pneumatic excitation by plasma pulse discharge is a new excitation method that uses high-voltage pulse power to realize gas discharge and generate charged particles; under the action of electric field force, the charged particles move directional and produce temperature and pressure changes, thereby exerting effective disturbance on the flow field. In the case of 10ns pulsed high-voltage discharge, when the pulsed electric field increases from 10kV / cm to 40kV / cm, the decay time of the plasma increases from tens of nanoseconds to several microseconds according to the measurement results of light radiation. level; macroscopically, it is manifested as a significant increase in the induction speed. However, combined with the general laws of current research in the field of flow control, the current induced jet velocity cannot achieve extensive and effec...

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Abstract

The invention provides a three-electrode-layout DBD exciter. The three-electrode-layout DBD exciter is composed of a high-voltage electrode (1), a ground electrode (2), a third electrode (3) and a blocking dielectric layer (4). Based on this, the invention provides a device for increasing an induced jet velocity of a surface DBD exciter. The device comprises a short pulse high-voltage high-frequency plasma power supply (5), the three-electrode-layout DBD exciter and a bias high-voltage direct-current power (6). The invention further provides a method for increasing the induced jet velocity ofthe surface DBD exciter. According to the method, the plasma induced jet velocity is remarkably increased, and the discharge induced near wall jet can reach more than 10m / s.

Description

technical field [0001] The invention relates to the fields of dielectric barrier discharge plasma technology and aerodynamics, in particular to a method for increasing the jet velocity induced by a surface DBD actuator. Background technique [0002] Since the 1990s, plasma flow control technology, as a new concept of active flow control technology, has good advantages and potential in improving the aerodynamic characteristics of aircraft and engines. Its main features are: rapid response, no moving parts, excitation Wide frequency band and easy arrangement of excitation devices. At present, the most widely studied in the world is the aerodynamic excitation of surface dielectric barrier discharge (DBD) plasma generated under the action of high voltage sine wave. The exciter is composed of surface exposed electrodes, buried electrodes and intermediate insulating barrier dielectric layer. Its basic typical layout is that asymmetric electrodes are arranged on both sides of the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/24
CPCH05H1/2406H05H1/2418
Inventor 赵光银梁华贺启坤
Owner AIR FORCE UNIV PLA
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