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Flow direction multi-channel pulsed arc plasma flow control device and shock wave intensity weakening method thereof

A plasma and pulsed arc technology, applied in the direction of plasma, electrical components, etc.

Inactive Publication Date: 2020-03-17
AIR FORCE UNIV PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the control of shock wave / boundary layer interference by pulsed arc plasma excitation is mostly carried out by means of single-channel exciter and large energy supply, and the excitation frequency is mostly less than 10kHz. Although a certain flow control effect has been achieved, it shows obvious unsteady
Therefore, the current pulsed arc plasma excitation cannot meet the needs of practical applications and must be improved.

Method used

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  • Flow direction multi-channel pulsed arc plasma flow control device and shock wave intensity weakening method thereof
  • Flow direction multi-channel pulsed arc plasma flow control device and shock wave intensity weakening method thereof
  • Flow direction multi-channel pulsed arc plasma flow control device and shock wave intensity weakening method thereof

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specific Embodiment

[0044] combine figure 1 , the flat plate 1 and the compression slope 5 constitute a typical flat-compression slope structure, forming a typical compression slope shock wave / boundary layer interference flow field, and the angle of the compression slope 5 is 24 degrees (the most typical shock wave / boundary layer interference flow field in the world layer interference configuration). The last group of discharge channels (the fifth positive electrode 2-9 and the fifth negative electrode 2-10) is installed upstream of the compression slope 5, and the distance from the head of the compression slope 5 is 25mm.

[0045] The pulse power supply 4 applies a pulse voltage to the circuit loop, the voltage is 20kV, the excitation frequency is 10kHz, and the pulse width is 1000ns.

[0046] The first positive electrode 2-1 and the first negative electrode 2-2 form an arc discharge on the upper surface of the plate 1 under the excitation of the voltage, and so on, until the fifth positive ele...

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Abstract

The invention provides a flow direction multi-channel pulsed arc plasma flow control circuit system which comprises a flat plate (1), a discharge electrode (2), a cylindrical vertical through hole (3)directly machined in the surface of the flat plate, a pulsed power supply (4) and a compression slope (5). The invention further provides a method for weakening the shock wave intensity through flowdirection multi-channel pulsed arc plasma excitation. By flowing to the multi-channel pulsed arc plasma excitation device, the interaction times of precursor shock waves generated by pulsed arc excitation and shock wave / boundary layer interference separation shock waves are increased, so that continuous disturbance on the separation shock waves is realized, and the strength of the separation shockwaves is weakened.

Description

technical field [0001] The invention relates to a plasma active flow control technology, in particular to a method for reducing the interference intensity of a shock wave / boundary layer and a corresponding flow direction multi-channel pulsed arc discharge plasma actuator. Background technique [0002] In the development of a new generation of turbine-based high-speed combined power, the aerodynamic design of the inlet, trans / supersonic compressor is faced with complex shock wave / boundary layer interference problems. The separation of the boundary layer induced by the strong reverse pressure gradient of the shock wave, the low-frequency unstable movement of the flow field structure in the interference area, the significant increase of pressure load and thermal load in the local area, and the obvious sudden increase of the turbulence downstream of the interference area are all caused by the shock wave. The negative effects caused by wave / boundary layer interference, in severe ...

Claims

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Application Information

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IPC IPC(8): H05H1/02H05H1/24
CPCH05H1/02H05H1/24
Inventor 吴云唐孟潇郭善广梁华张志波金迪甘甜
Owner AIR FORCE UNIV PLA
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