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Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method

A dielectric barrier discharge and plasma technology, which is applied in the directions of plasma, electrical components, transportation and packaging, can solve the problems of not being able to put down, the landing gear cannot be put down in place, etc., to achieve rapid response, easy adjustment and reduction of excitation parameters. Effects of wake loss

Inactive Publication Date: 2012-07-18
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Aircraft landing gear will bring greater resistance and aerodynamic noise, especially when the landing gear is lowered, the aerodynamic resistance will do negative work. If the hydraulic pressure provided by the hydraulic cylinder cannot reach the required load, the landing gear may not be lowered in place within the specified time, or may not be lowered at all, which is an extremely dangerous situation

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  • Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method
  • Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method
  • Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method

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Embodiment Construction

[0034] A method of dielectric barrier discharge plasma trailing edge jet of the present invention comprises steps:

[0035] a) Arranging multiple groups of plasma actuators on the cylinder;

[0036] b) Put the cylinder on the outer circle of the upper part of the aircraft landing gear wheel strut;

[0037] c) After the exciter is connected to high voltage, it ionizes the nearby air to generate plasma;

[0038] d) The generated plasma accelerates the movement of low-velocity gas in the boundary layer, and flattens the wake area of ​​the flow around the cylinder, thereby achieving the effect of reducing wake loss and reducing aerodynamic noise.

[0039] The boundary layer is the contact layer between the gas and the outer surface of the cylinder.

[0040] A dielectric barrier discharge plasma trailing edge jet device, including three parts: a cylinder, multiple sets of plasma exciters and a high-voltage power supply; wherein, the cylinder is made of insulating material and is ...

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Abstract

The invention discloses a dielectric barrier discharge (DBD) plasma trailing edge jetting device and method, relating to a flow control technology. The device comprises a plurality of groups of plasma exciters, insulating media and a high-voltage power supply and is used for improving the flowing at a wake area for the flow around a cylinder, wherein the plasma excitation of certain strength is applied to a proper position at a leeward of the cylinder, the movement of low-velocity flowing bodies in a boundary layer is accelerated to form jet flows on a wake space at the trailing edge of the cylinder, so that a wake low-velocity area can be flattened to further achieve the effects of improving a flow field at the wake area and reducing wake losses pneumatic noises, and the device can be applied to resistance reduction and noise reduction for an aircraft landing gear. The DBD plasma trailing edge jetting device disclosed by the invention has the advantages of simple and compact structure, high reaction speed, low energy consumption and the like.

Description

technical field [0001] The invention relates to the technical field of flow control, and relates to a dielectric barrier discharge plasma trailing edge jet device and method, which can improve the flow around a cylinder in the wake area and is mainly used in the aviation industry. Background technique [0002] With the advancement of science and technology and the improvement of living standards, air transportation is becoming more and more popular because of its convenience. As one of the key components of the aircraft, the landing gear system directly affects the take-off, landing performance and flight safety of the aircraft, and the landing gear system plays a vital role in the aircraft components. Aircraft landing gear will bring greater resistance and aerodynamic noise, especially when the landing gear is lowered, the aerodynamic resistance will do negative work. If the hydraulic pressure provided by the hydraulic actuator does not reach the required load, the landing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/30B64C25/00
Inventor 李纲
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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