A method for controlling the flow of concave cavity by different-side arc discharge excitation
A technology of arc discharge and excitation control, which is applied in the field of flow control in the aerospace field, and can solve the problems of non-adjustable excitation position and excitation frequency, small excitation intensity, and slow response.
Active Publication Date: 2022-04-22
AIR FORCE UNIV PLA
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Problems solved by technology
The traditional shear layer control method has the disadvantages of slow response, small excitation intensity, non-adjustable excitation position and excitation frequency, etc.
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[0025]Install a plate with a concave cavity and a lower plate with an exciter on the Mach 2 wind tunnel test bench. The front edges of the upper and lower plates are at an oblique angle of 15 degrees. The position is the same, and the flat model is fixed by 5 M6 bolts on the left and right sides. The cavity is set as an open cavity with length L=80mm and depth D=10mm. The inclination angle of the rear wall of the cavity is 45 degrees, and the distance between the front wall of the cavity and the front edge of the plate is 200mm; The distance from the front edge of the plate is 155mm, and the flow distance between the exciter and the front edge of the cavity is 15mm. The specific setting of the exciter is as follows: the electrode material is a tungsten needle with a diameter of 1 mm, the distance between the electrodes in the span direction is 2.5 mm, the distance between the electrode pairs in the span direction is 15 mm, and the distance between the electrode pairs in the fl...
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A device for exciting and controlling the flow of a concave cavity by arc discharge on different sides includes an upper plate, a lower plate, an excitation block and a high-voltage direct current power supply. The right side of the upper plate has a concave cavity facing downward, the front edge of the upper plate has a first bevel; the front edge of the lower plate has a second bevel, and the lower plate is punched with a plurality of two-stage cylindrical through holes for Fix the plasma exciter, the upper through hole is used to fix the discharge electrode, and the lower through hole is used to fix the wire connecting the discharge electrode; N discharge power supplies are used to supply power to the exciter for the N rows respectively; the output terminals of the synchronous controller control the N The work of a discharge power supply. Also provided is a method for controlling the flow of the cavity by different-side arc discharge excitation. The device and method of the invention can regulate the flow state of supersonic concave cavity shear by changing the structure, layout, excitation frequency and excitation energy of the arc plasma exciter.
Description
[0001] The invention relates to the field of flow control in the field of aerospace, in particular to a method for controlling the flow of a cavity by different-side arc discharge excitation. Background technique [0002] The concave cavity is a typical scramjet fuel mixing enhancement and flame stabilization technology. The supersonic airflow flowing through the concave cavity will form a recirculation zone in the cavity. The increase of the recirculation zone can improve the flame stabilization ability of the combustion chamber. The concave cavity is composed of the front edge, the rear edge and the bottom wall. The main structural dimensions are: length L, depth D, length-depth ratio L / D and rear wall inclination. The length-to-depth ratio L / D of the cavity determines the flow type of the cavity, which can be specifically divided into: L / D<10 is an open cavity, L / D>13 is a closed cavity, L / D=10-13 It is a transitional cavity. A shear layer is formed between the low-v...
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IPC IPC(8): F23R3/16H05H1/02
CPCF23R3/16H05H1/02
Inventor 郭善广罗彦浩吴云梁华宋慧敏
Owner AIR FORCE UNIV PLA