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High-frequency array type combined arc discharge exciter and method for controlling shock wave boundary layer interference instability thereof

An arc discharge and exciter technology, which is applied in the field of plasma, can solve the problems of inability to realize the disturbance effect and low excitation frequency, and achieve the effect of realizing the quasi-steady-state control effect of the excitation.

Inactive Publication Date: 2020-03-27
AIR FORCE UNIV PLA
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Problems solved by technology

The control of the entire front of the shock wave has been realized, but the excitation frequency is still low, and the quasi-steady disturbance to the boundary layer cannot be realized, which has become the key to restricting the shock wave control efficiency of the plasma exciter

Method used

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  • High-frequency array type combined arc discharge exciter and method for controlling shock wave boundary layer interference instability thereof
  • High-frequency array type combined arc discharge exciter and method for controlling shock wave boundary layer interference instability thereof
  • High-frequency array type combined arc discharge exciter and method for controlling shock wave boundary layer interference instability thereof

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specific Embodiment

[0056] see Figure 1~2 , the exciter model mainly consists of two parts: a plate model 101 and an electrode 102 . Two round holes are opened on the insulating plate, the diameter of the surface electrodes ranges from 1 to 5 mm, preferably 2 mm, and the distance between the centers of the two holes ranges from 1 to 10 mm, preferably 4 mm. The upper end of the electrode 102 is flush with the upper surface of the flat plate model 101 to avoid clutter interference in the supersonic flow field.

[0057] Such as figure 2 As shown, the output voltage of the high-frequency nanosecond pulse power supply is 0-20kV, and the excitation frequency is 0-50kHz. The exciter 203-1 connected to the output end of the high-frequency nanosecond pulse power supply 201 has a voltage rise at one end (positive end) of the exciter, and the other end (negative end) is still in a low-voltage state. When its breakdown voltage is reached, the exciter 203- 1 The air between the electrodes is broken down,...

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Abstract

The invention provides a device for controlling shock wave boundary layer interference instability by a high-frequency array type combined arc discharge exciter. The device comprises a driving power supply (201), an exciter (203) and a circuit parameter control box (202). The invention further provides a high-frequency array type combined arc discharge exciter and a method for controlling shock wave boundary layer interference instability of the high-frequency array type combined arc discharge exciter. The purpose of weakening shock wave boundary layer interference flow instability is achieved, high-frequency array type arc discharge excitation serves as a control means, and the excitation quasi-steady-state control effect is achieved by increasing the disturbance frequency.

Description

technical field [0001] The invention relates to plasma technology, in particular to a device and method for controlling shock wave intensity by multi-channel array high-frequency pulse arc discharge. Background technique [0002] Supersonic / hypersonic technology represents a country's ability to develop and utilize space in the future, and is an important symbol to measure the combat effectiveness and survivability of an army. It has broad application prospects and extremely important military value. Plasma impingement flow control based on supersonic / hypersonic technology has the characteristics of fast response, wide frequency band and high intensity. The low-frequency instability of the shock boundary layer is the focus of research in recent years. In the disturbance of the supersonic shock boundary layer, a low-frequency oscillation phenomenon usually occurs at the root of the shock wave due to the disturbance of the boundary layer, accompanied by flow Low-frequency mot...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C21/00
CPCB64C21/00
Inventor 吴云甘甜金迪唐孟潇宋慧敏贾敏梁华
Owner AIR FORCE UNIV PLA