Device and method for regulating and controlling supersonic cavity shear layer through arc discharge excitation
Pending Publication Date: 2021-06-04
AIR FORCE UNIV PLA
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Traditional shear layer control has shortcomings such as slow response speed, unadjustable excitation position, uncontrollable excitation frequency, and large flow loss. Slice flow control needs
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment
[0038] Install a flat plate with a concave cavity on the Mach 2 wind tunnel test bench, fix the flat plate model by five M6 bolts on the left and right sides, the front edge of the flat plate is at an oblique angle of 15°, and the concave cavity is set to have a length of L=100mm and a depth of D= 15mm open cavity, the rear wall of the cavity is inclined, the inclination angle is 45°, the distance between the front wall of the cavity and the front edge of the plate is 200mm, and 1×5 surface arc exciters are installed 15mm upstream of the cavity. The specific settings of the exciter are as follows: the electrode material uses tungsten needles with a diameter of 1mm, the distance between the electrodes is 5mm, the distance between the electrode pairs is 15mm, the distance between the electrode pair 5 closest to the concave cavity is 15mm, and the distance between the electrode pair 1 and the farthest is 75mm. Connect one end of electrode pair 1 to the high-voltage end of the hig...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| depth | aaaaa | aaaaa |
| length | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a device for regulating and controlling a supersonic cavity shear layer through arc discharge excitation. The device comprises a flat plate with a cavity, an excitation block, a discharge electrode and a high-voltage pulse power supply. A cavity is dug in the rear edge of the flat plate, a bevel angle is arranged on the front edge, an excitation block is installed between the cavity and the front edge of the flat plate and on the upper surface of the flat plate, the excitation block is embedded, and the upper surface of the excitation block is flush with the upper surface of the flat plate. Cylindrical two-stage through holes which are perpendicular to the upper surface of the excitation block and are used for fixing discharge electrodes are formed in the excitation block, the two-stage through holes are distributed in the excitation block in an array mode, the upper-stage through hole is close to the surface of the flat plate, the lower-stage through hole is far away from the surface of the flat plate, and wires in the same two-stage through hole are electrically connected with the electrodes. And the discharge power supply adopts a high-voltage high-frequency nanosecond pulse power supply. The invention discloses a method for regulating and controlling a supersonic cavity shear layer through arc discharge excitation. By changing the structure, layout, excitation frequency and excitation energy of the arc plasma exciter, the flow state of supersonic cavity shearing can be regulated and controlled.
Description
technical field [0001] The invention relates to the field of flow control in the field of aerospace, in particular to a method and device for arc discharge excitation and regulation of supersonic concave cavity shear layer. Background technique [0002] The concave cavity is a typical scramjet fuel mixing enhancement and flame stabilization technology, and it is composed of a backward step and a forward step in structure. When the supersonic airflow flows through the cavity, a recirculation zone will be formed in the cavity, and the low-speed recirculation and high-speed mainstream in the cavity form a shear layer. According to the development mode of the shear layer, the supersonic cavity flow can be divided into three types: open type, closed type and transition type. The shear layer formed at the front edge of the open cavity spans the entire cavity, and then attaches to the rear wall of the cavity, and there is a weak shock wave at the point of separation and reattachme...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/24
CPCH05H1/24
Inventor 郭善广梁华罗彦浩吴云金迪
Owner AIR FORCE UNIV PLA