CN113153539B - Single-double-circuit combined three-dimensional rotating sliding arc plasma exciter - Google Patents

Abstract

The invention discloses a single-double-circuit combined three-dimensional rotating sliding arc plasma exciter, which comprises: the inner layer cyclone comprises a fuel nozzle interface, a first guide vane and an inner annular wall, and when voltage is applied between the cathode fuel nozzle and the inner anode metal ring, a plasma arc is generated in a space between the cathode fuel nozzle and the inner anode metal ring; the outer cyclone comprises a second guide vane and an outer annular wall, and when voltage is applied between the outer anode metal ring and the cathode lip ring, plasma arc is generated in the space between the outer anode metal ring and the cathode lip ring. The invention adopts the inner and outer cyclone, and the inner and outer electrode groups can generate plasma arc at the same time, thus not only ensuring the reliability and stability of the ignition of the mixed gas, but also fully cracking and burning the mixed gas, injecting active particles, widening the ignition boundary of the combustion chamber of the aeroengine and improving the combustion efficiency.

Description

A Three-dimensional Rotating Sliding Arc Plasma Actuator Combining Single and Dual Channels

technical field

The invention relates to the technical field of aerodynamic plasma enhanced combustion, in particular to a three-dimensional rotary sliding arc plasma actuator combining single and double channels.

Background technique

At present, the combustion chambers of aviation turbine engines on most aircraft adopt the electric spark nozzle ignition method. This method has small ignition energy, narrow ignition range, and low ignition success rate, which cannot meet the requirements of the combustion chamber in a wide range of harsh conditions. Improved performance of aero-engines.

Plasma ignition and combustion-supporting technology is a new technology emerging in recent years, because plasma has unique properties such as thermal effect, chemical effect and aerodynamic effect. The research results show that the use of plasma ignition can just meet the requirements of large-scale ignition of the combustion chamber. It has the following advantages: greatly widening the ignition boundary, shortening the ignition delay time, improving the ignition reliability, improving the combustion efficiency of the combustion chamber, improving the thermal uniformity of the combustion chamber outlet, reducing pollutant emissions, and improving the fuel atomization effect, etc. The sliding arc-based plasma ignition and combustion-supporting technology has great potential in high-altitude ignition due to its advantages of high ignition energy and strong molecular activity. However, the currently designed sliding arc plasma actuators at the head of the combustion chamber are all single-arc structures, and only one sliding arc acts on the gas mixing area at a time.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and provide a three-dimensional rotary sliding arc plasma exciter combining single and double circuits, which adopts inner and outer two-layer cyclones, and two sets of inner and outer electrodes can work independently to ensure Ignition and combustion under normal working conditions can also work at the same time to ensure ignition and combustion under extremely harsh conditions, which not only ensures the reliability and stability of ignition of the mixed gas, but also fully cracks and burns the mixed gas, and injects active particles to broaden the The flame-out boundary of the combustion chamber improves the combustion efficiency.

In order to achieve the above purpose, the technical solution adopted by the invention is: a three-dimensional rotating sliding arc plasma actuator combined with single and double channels, which includes: inner swirler, outer swirler, cathode fuel nozzle, inner anode Metal ring, external anode metal ring and cathode lip ring;

The cathode fuel nozzle is fixedly installed on the inner swirler, the inner anode metal ring and the outer anode metal ring are both arranged on the inner swirler, and the cathode lip ring is arranged on the outer swirler superior;

The inner swirler includes a fuel nozzle interface, a first guide vane and an inner ring wall, the fuel nozzle interface is arranged on the inner side of the inner ring wall, and one end of the first guide vane is connected to the outer wall of the fuel nozzle interface Fixedly connected, the other end of the first guide vane is fixedly connected to the inner wall of the inner ring wall, the number of the first guide vanes is multiple, and the plurality of first guide vanes are along the inner circumference of the inner ring wall Evenly arranged, the cathode fuel nozzle is arranged in the fuel nozzle interface, the inner anode metal ring is arranged on the inner wall of the inner ring wall, and when a voltage is applied between the cathode fuel nozzle and the inner anode metal ring, for A plasma arc is generated in the space between the cathode fuel nozzle and the inner anode metal ring, and the outer anode metal ring is arranged on the outer wall of the inner ring wall;

The outer swirler includes a second guide vane and an outer ring wall, the outer ring wall is arranged outside the inner ring wall, one end of the second guide vane is fixedly connected to the outer wall of the inner ring wall, so The other end of the second guide vane is fixedly connected to the inner wall of the outer ring wall, the number of the second guide vanes is multiple, and the plurality of second guide vanes are evenly arranged along the inner circumference of the outer ring wall, so The cathode lip ring is fixed on the top of the outer ring wall and is located outside the outer anode metal ring, and when a voltage is applied between the outer anode metal ring and the cathode lip ring, it is used to connect the outer anode metal ring and the cathode lip A plasma arc is generated in the space between the rings.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double channels is characterized in that the inner ring wall includes an inner ring wall body and an insulating ring for fixing the inner anode metal ring and the outer anode metal ring , the insulating ring includes an insulating ring body, an insulating ring mounting boss, an inner annular boss, an outer annular boss, an inner anode ring groove and an outer anode ring groove, and the insulating ring installation boss is set At the bottom of the insulating ring body and used to install the insulating ring on the top of the inner ring wall body, the top of the insulating ring extends inward to form an inner annular boss and extends outward to form an outer annular boss, and the inner anode The ring-shaped slot is opened at the bottom of the inner annular boss and the opening of the inner anode ring-shaped slot faces downward, and the outer anode ring-shaped slot is opened at the bottom of the outer annular boss and the outer anode The opening of the ring-shaped clamping groove faces downward, and the upper end of the inner ring wall body is provided with an annular insulating ring installation groove matched with the insulating ring installation boss.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double channels is characterized in that the cathode lip ring is a convergent and diffuse hollow rotator, which includes an upper diffusion section and a lower convergence section. The diverging section and the converging section are integrally structured, and the lower part of the converging section is fixedly connected to the top of the outer ring wall.

The above-mentioned three-dimensional rotary sliding arc plasma exciter combined with single and double channels is characterized in that, the thickness of the cathode lip ring is 1mm~3mm, and the height of the cathode lip ring is 12mm~16mm; The inner diameter of the opening at the lower end of the convergent section is 28mm~32mm, the height of the convergent section is 8mm~12mm, the angle between the busbar of the convergent section and the central axis is α, and the α is 5~15°; The diffusion section is a thin-walled annular lip with gradually larger openings, the expansion angle of the diffusion section is β, the β is 80°~100°, and the inner diameter of the lower opening of the diffusion section is 25mm~29mm; The height of the segment is 2mm ~ 6mm.

The above-mentioned three-dimensional rotary sliding arc plasma exciter combined with single and double channels is characterized in that the insulating ring is a convergent hollow rotator, the central line contraction angle of the insulating ring is ψ, and the ψ is 5 °~15°, the inner diameter of the lower end surface of the insulating ring is 21mm~25mm, the height of the insulating ring is 6mm~10mm, and the thickness of the insulating ring body is 0.4mm~0.8mm.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double channels is characterized in that the inner diameter of the inner annular boss is 21 mm to 25 mm, and the thickness of the top of the insulating ring is 1.4 mm to 1.8 mm. The heights of the inner annular boss and the outer annular boss are the same and both are 0.3 mm to 0.7 mm.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double channels is characterized in that the outer anode ring-shaped slot is an annular slot, and the outer diameter of the outer anode ring-shaped slot is 20mm~ 24mm, the thickness of the external anode ring groove is 0.2mm~0.4mm, and the depth of the outer anode ring groove is 0.2mm~0.4mm;

The inner anode ring groove is an annular groove, the inner diameter of the inner anode ring groove is 18mm~22mm, and the thickness of the inner anode ring groove is 0.2mm~0.4mm. The depth of the anode ring groove is 0.2mm~0.4mm.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double channels is characterized in that the inner anode metal ring is a tapered hollow rotator, and the inner anode metal ring is made of tungsten-copper alloy material The thickness of the inner anode metal ring is 0.3mm~0.7mm, the inner diameter of the lower end surface of the inner anode metal ring is 20mm~24mm, and the height of the inner anode metal ring is 6mm~10mm, so The convergence angle of the inner anode metal ring is γ, and the γ is 5°~15°, and the top of the inner anode metal ring is embedded in the inner anode ring-shaped slot;

The outer anode metal ring is a tapered hollow rotator, the outer anode metal ring is made of tungsten copper alloy material, the thickness of the outer anode metal ring is 0.3mm~0.8mm, the outer anode metal ring is The inner diameter of the lower end surface of the anode metal ring is 22mm~26mm, the angle between the bus bar of the outer anode metal ring and the axis of the shaft is 5°~15°, and the height of the outer anode metal ring is 6mm~10mm , the top of the outer anode metal ring is embedded in the outer anode ring groove.

The above-mentioned three-dimensional rotary sliding arc plasma exciter combined with single and double channels is characterized in that the inner diameter of the insulating ring mounting boss is 21 mm to 25 mm, and the thickness of the insulating ring mounting boss is 0.4 mm to 0.8 mm. mm, the height of the insulating ring installation boss is 0.3mm~0.7mm.

The above-mentioned three-dimensional rotating sliding arc plasma exciter combined with single and double paths is characterized in that the three-dimensional rotating sliding arc plasma actuator combined with single and double paths also includes an outer anode terminal and an inner anode terminal , the upper end of the outer anode terminal is connected to the bottom of the outer anode metal ring through threads, the upper end of the inner anode terminal is connected to the bottom of the inner anode metal ring through threads, and the inner ring wall is provided with There is a first through hole for the passage of the anode terminal of the external circuit and a second through hole for the passage of the anode terminal of the internal circuit, the lower end of the anode terminal of the external circuit passes through the first through hole, and the internal circuit The lower end of the anode terminal passes through the second through hole.

Compared with the prior art, the present invention has the following advantages:

1. The present invention adopts inner and outer double-layer swirlers, and the inner and outer two sets of electrodes can generate plasma arc at the same time, and can also work independently, which can meet the ignition and combustion support of aero-engines in different states, and not only ensure the reliability of mixed gas ignition and stability, and can fully crack and burn the mixed gas, and inject active particles to widen the ignition boundary of the combustion chamber and improve the combustion efficiency.

2. The present invention is installed at the position of the swirler at the front of the flame tube of the aero-engine combustion chamber, without changing the original structure of the combustion chamber, and basically not affecting the flow field characteristics of the head air intake.

3. The arrangement of the components of the invention is reasonable, the two groups of ring-shaped arc discharges are ingeniously realized, and the two inner and outer plasmas are ignited, which not only ensures the reliability and stability of the ignition of the mixed gas, but also realizes the function of the traditional combustion chamber ignition device, which is extremely Greatly simplify the structural composition of the combustion chamber. It effectively widens the stable combustion range of the engine, broadens the ignition boundary of the combustion chamber, improves the combustion efficiency, and provides a reliable solution to the ignition problem of the engine in extreme environments such as difficult ignition at high altitudes.

The invention will be described in further detail below by means of the accompanying drawings and examples.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the present invention.

Fig. 2 is a three-dimensional sectional view of the present invention.

Figure 3 is a front sectional view of the present invention.

Fig. 4 is a front sectional view of the insulating ring of the present invention.

Explanation of reference signs:

10—inner layer cyclone; 11—Fuel nozzle interface; 12—the first guide vane; 13—inner ring wall; 13-1—inner ring wall body; 13-2—insulation ring; 13-21—insulation ring body; 13-22—Insulation ring installation boss; 13-23—inner annular boss; 13-24—outer annular boss; 13-25—inner anode ring-shaped slot; 13-26—Outer circuit anode ring type slot; 20—outer cyclone; 21—the second guide vane; 22—outer ring wall; 30—cathode fuel nozzle; 40—inner anode metal ring; 50—external anode metal ring; 60—cathode lip ring; 61—diffusion section; 62—Convergence section.

Implementation

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for exemplary purposes only, and are not intended to limit the protection scope of the present invention.

It should be noted that concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the sequence of functions performed by these devices, modules or units or interdependence.

In order to increase the ignition area of the sliding arc, enhance the ignition energy, and further improve the high-altitude ignition capability of the sliding arc plasma actuator, it is necessary to design a sliding arc plasma actuator with a multi-arc structure. After the inventor's research and experiments, the sliding arc discharge with multi-arc structure has shown great advantages in the ignition and combustion support of the aero-engine combustor. The contact area increases the initial ignition area and effectively improves the ignition capability of the sliding arc plasma actuator. At the same time, it still has many advantages such as single-arc plasma promoting the atomization and cracking of fuel oil, wide working conditions, no specific requirements for the airflow at the inlet of the combustion chamber, simple electrode structure, and the arc is less affected by the airflow at the inlet of the combustion chamber. Therefore, the inventor has designed a new two-way three-dimensional rotating sliding arc exciter based on the head of the aeroengine combustion chamber in combination with the sliding arc discharge characteristics of the multi-arc structure. As shown in Figure 1 and Figure 2, it includes: inner swirler 10, outer swirler 20, cathode fuel nozzle 30, inner anode metal ring 40, outer anode metal ring 50 and cathode lip ring 60 , the cathode fuel nozzle 30 is fixedly installed on the inner swirler 10, the inner anode metal ring 40 and the outer anode metal ring 50 are both arranged on the inner swirler 10, the cathode lip ring 60 is arranged on the outer cyclone 20;

The inner swirler 10 includes a fuel nozzle interface 11, a first guide vane 12 and an inner ring wall 13, the fuel nozzle interface 11 is arranged on the inner side of the inner ring wall 13, and the first guide vane 12 One end is fixedly connected to the outer wall of the fuel nozzle interface 11, and the other end of the first guide vane 12 is fixedly connected to the inner wall of the inner ring wall 13. The number of the first guide vanes 12 is multiple, and the plurality of The first guide vanes 12 are evenly arranged along the inner circumference of the inner ring wall 13, the cathode fuel nozzle 30 is arranged in the fuel nozzle interface 11, the inner anode metal ring 40 is arranged on the inner wall of the inner ring wall 13, and When a voltage is applied between the cathode fuel nozzle 30 and the inner anode metal ring 40, it is used to generate a plasma arc in the space between the cathode fuel nozzle 30 and the inner anode metal ring 40, and the outer anode metal ring 50 is set on the outer wall of the inner ring wall 13;

The outer swirler 20 includes a second guide vane 21 and an outer ring wall 22, the outer ring wall 22 is arranged outside the inner ring wall 13, one end of the second guide vane 21 is connected to the inner ring wall 13 is fixedly connected to the outer wall, and the other end of the second guide vane 21 is fixedly connected to the inner wall of the outer ring wall 22. The number of the second guide vanes 21 is multiple, and the plurality of second guide vanes 21 are evenly arranged along the inner circumference of the outer ring wall 22, and the cathode lip ring 60 is fixedly arranged on the top of the outer ring wall 22 and is located outside the outer anode metal ring 50, and between the outer anode metal ring 50 and the cathode lip ring When a voltage is applied between 60, it is used to generate a plasma arc in the space between the outer anode metal ring 50 and the cathode lip ring 60.

In this embodiment, two layers of swirlers inside and outside, that is, two-stage swirl, are used to make fuel and air more fully mixed. In the inner swirler 10, when a voltage is applied between the cathode fuel nozzle 30 and the inner anode metal ring 40, a plasma arc is generated between the cathode fuel nozzle 30 and the inner anode metal ring 40; the outer swirler 20 Among them, when a voltage is applied between the outer anode metal ring 50 and the cathode lip ring 60 , a plasma arc is generated between the outer anode metal ring 50 and the cathode lip ring 60 . The two sets of electrodes can work alone to meet the ignition and combustion support under normal conditions and ensure normal combustion in the combustion chamber with a small power; they can also work at the same time to meet the ignition and combustion support of the combustion chamber under extreme working conditions, greatly expanding the The ignition limit of the aero-engine increases the flight altitude of the aircraft. It not only ensures the reliability and stability of the mixture gas ignition, but also fully cracks and burns the mixture gas, injects active particles, widens the ignition boundary of the combustion chamber, and improves the combustion efficiency.

As shown in Figures 1 to 4, the inner ring wall 13 includes an inner ring wall body 13-1 and an insulating ring 13-2 for fixing the inner anode metal ring 40 and the outer anode metal ring 50, the insulator The ring 13-2 includes an insulating ring body 13-21, an insulating ring mounting boss 13-22, an inner annular boss 13-23, an outer annular boss 13-24, an inner anode ring-type card slot 13-25 and an outer circuit An anode ring type slot 13-26, the insulating ring installation boss 13-22 is arranged on the bottom of the insulating ring body 13-21 and is used to install the insulating ring 13-2 on the top of the inner ring wall body 13-1, The top of the insulating ring 13-2 extends inwardly to form an inner annular boss 13-23 and extends outward to form an outer annular boss 13-24, and the inner anode ring-shaped slot 13-25 is provided on the inner annular boss. The bottom of the platform 13-23 and the opening of the inner anode ring-type slot 13-25 is facing downward, and the outer anode ring-type slot 13-26 is provided at the bottom of the outer ring boss 13-24 and the The opening of the outer anode ring groove 13-26 faces downward, and the upper end of the inner ring wall body 13-1 is provided with an annular insulation ring installation groove matching the insulation ring installation boss 13-22.

In this embodiment, the insulating ring 13-2 separates and insulates the inner and outer anode metal rings, so that the two-stage discharges do not interfere with each other in the process of generating plasma.

As shown in Figure 2, the cathode lip ring 60 is a convergent and diffuse hollow body of revolution, which includes an upper diffuser section 61 and a lower convergent section 62, the diffuser section 61 and the convergent section 62 are integrally structured, so The lower portion of the converging section 62 is fixedly connected to the top of the outer ring wall 22 .

In this embodiment, the thickness of the cathode lip ring 60 is 1mm~3mm, the height of the cathode lip ring 60 is 12mm~16mm; the inner diameter of the lower opening of the convergence section 62 is 28mm~32mm, and the convergence The height of the section 62 is 8mm~12mm, the angle between the busbar of the convergent section 62 and the central axis is α, and the α is 5~15°; Lip, the expansion angle of the diffusion section 61 is β, the β is 80°~100°, the inner diameter of the lower opening of the diffusion section 61 is 25mm~29mm; the height of the diffusion section 61 is 2mm~6mm .

Specifically, in this embodiment, the overall thin wall thickness of the cathode lip ring 60 is 1.2 mm, and the overall height distance is 14 mm. The inner diameter of the opening at the lower end of the convergent section 62 is 30.5 mm, the wall thickness is 1.2 mm, and the height is 10.4 mm. The angle α between the busbar of the convergent section 62 and the central axis is 10°. 3.6mm, expansion angle β is 90°.

The cathode lip ring 60 is embedded with the cathode lip ring installation groove processed on the upper end of the outer ring wall 22 through the cathode lip ring installation boss at the bottom end, and is connected with the constriction section at the rear of the cyclone to form a converging channel. The cathode lip ring installation boss is annular, with an inner diameter of 29.00mm-33.00mm, a thickness of 0.4mm-0.8mm, and a height of 0.3mm-0.7mm.

Specifically, in this embodiment, the inner diameter of the cathode lip ring installation boss is 31 mm, the thickness is 0.6 mm, and the height is 0.5 mm.

As shown in Figure 2 and Figure 3, the insulating ring 13-2 is a convergent hollow body of revolution, the central line contraction angle of the insulating ring 13-2 is ψ, and the ψ is 5°~15°, the The inner diameter of the lower end surface of the insulating ring 13-2 is 21mm~25mm, the height of the insulating ring 13-2 is 6mm~10mm, and the thickness of the insulating ring body 13-21 is 0.4mm~0.8mm.

Specifically, in this embodiment, the central line contraction angle ψ of the insulating ring 13-2 is 10°, the inner diameter of the lower end surface of the insulating ring 13-2 is 23.4 mm, the thickness is 0.65 mm, and the height is 8.5 mm.

In this embodiment, the inner diameter of the inner annular boss 13-23 is 21mm~25mm, the thickness of the top of the insulating ring 13-2 is 1.4mm~1.8mm, and the inner annular boss 13-23 and the outer annular The heights of the bosses 13-24 are the same and are all 0.3mm~0.7mm.

Specifically, in this embodiment, the outer diameter of the outer annular boss 13-24 is 22.7mm, the thickness is 1.65mm, and the height is 0.5mm.

In this embodiment, the outer anode annular slot 13-26 is an annular slot, the outer diameter of the outer anode annular slot 13-26 is 20 mm to 24 mm, and the outer anode annular slot The thickness of 13-26 is 0.2mm~0.4mm, and the depth of the external anode ring-shaped slot 13-26 is 0.2mm~0.4mm;

Specifically, in this embodiment, the outer anode installation groove 21 has an inner diameter of 21.7 mm, a thickness of 0.3 mm, and a depth of 0.3 mm.

The inner anode ring-type slot 13-25 is an annular slot, the inner diameter of the inner anode ring-type slot 13-25 is 18 mm to 22 mm, and the thickness of the inner anode ring-type slot 13-25 is 0.2mm~0.4mm, the depth of the inner anode ring-shaped groove 13-25 is 0.2mm~0.4mm.

Specifically, in this embodiment, the inner diameter of the inner anode installation groove 22 is 19.8 mm, the thickness is 0.3 mm, and the depth is 0.3 mm.

In this embodiment, the inner anode metal ring 40 is a tapered hollow rotating body, the inner anode metal ring 40 is made of tungsten-copper alloy material, and the thickness of the inner anode metal ring 40 is 0.3 mm~0.7mm, the inner diameter of the lower end surface of the inner anode metal ring 40 is 20mm~24mm, the height of the inner anode metal ring 40 is 6mm~10mm, and the convergence angle of the inner anode metal ring 40 is γ , the γ is 5°~15°, and the top of the inner anode metal ring 40 is embedded in the inner anode ring groove 13-25.

The top end of the inner anode metal ring 40 is a boss ring structure, the size of which is matched with the inner anode ring type groove 13-25.

The outer anode metal ring 50 is a tapered hollow rotating body, the outer anode metal ring 50 is made of tungsten-copper alloy material, and the thickness of the outer anode metal ring 50 is 0.3mm~0.8mm, The inner diameter of the lower end surface of the outer anode metal ring 50 is 22 mm to 26 mm, and the angle between the bus bar of the outer anode metal ring 50 and the axis of the axis is 5° to 15°. The outer anode metal ring 50 The height is 6mm~10mm, and the top of the outer anode metal ring 50 is embedded in the outer anode ring-shaped slot 13-26.

The outer anode metal ring 50 is embedded in the outer anode ring type slot 13-26 on the outer wall of the insulating ring 13-2 through the outer anode metal ring installation boss on the top, and the outer anode metal ring installation boss It is ring-shaped, with an outer diameter of 20mm~24mm, a thickness of 0.2mm~0.4mm, and a height of 0.2mm~0.4mm.

Specifically, in this embodiment, the thickness of the outer anode metal ring 50 is 0.5mm, the inner diameter of the lower end surface is 24.7mm, and the height is 8.5mm, and the included angle between the busbar of the outer anode metal ring 50 and the shaft axis is 10° , The outer diameter of the outer anode metal ring mounting boss is 22.3mm, the thickness is 0.3mm, and the height is 0.3mm. The diameter of the threaded hole connecting the bottom of the outer anode metal ring 50 with the outer anode terminal is 0.3mm, the depth is 0.5mm, and the center of the threaded hole is 0.2mm from the outer wall of the outer anode metal ring.

The top end of the outer anode metal ring 50 is also a boss ring structure, the size of which matches the outer anode ring groove 13-26.

In this embodiment, the inner diameter of the insulating ring mounting boss 13-22 is 21 mm to 25 mm, the thickness of the insulating ring mounting boss 13-22 is 0.4 mm to 0.8 mm, and the insulating ring mounting boss 13-22 has a thickness of 0.4 mm to 0.8 mm. 22 has a height of 0.3 mm to 0.7 mm.

Specifically, in this embodiment, the inner diameter of the insulating ring installation boss 13-22 is 23.4 mm, the thickness is 0.65 mm, and the height is 0.5 mm.

As shown in Figure 3, the three-dimensional rotary sliding arc plasma exciter combined with single and double circuits also includes an external anode terminal and an internal anode terminal, and the upper end of the external anode terminal is connected to the external anode by threads. The bottom of the metal ring 50 is connected, the upper end of the inner anode terminal is connected to the bottom of the inner anode metal ring 40 by threads, and the inner ring wall 13 is provided with a first passage for the outer anode terminal to pass through. A hole and a second through hole for the internal anode terminal to pass through, the lower end of the external anode terminal passes through the first through hole, and the lower end of the internal anode terminal passes through the second through hole. The first through hole and the second through hole are evenly arranged on the inner ring wall 13, the diameters of the first through hole and the second through hole are both 0.2 mm to 0.4 mm, and the opening direction is in line with the busbar of the inner ring wall 13 The directions are parallel, wherein the distance between the center of the first through hole and the outer surface of the bottom end of the inner ring wall 13 is 0.2mm~0.4mm, and the distance between the center of the second through hole and the inner wall surface of the bottom end of the inner ring wall 13 is 0.2mm~0.4mm.

The working principle of the present invention is as follows: the inner anode metal ring 40 and the outer anode metal ring 50 are respectively connected to the high-voltage line through the inner anode terminal and the outer anode terminal, and the cathode lip ring 60 and the cathode fuel nozzle 30 are connected to the casing Therefore, two sets of annular plasma sliding arcs are respectively formed between the cathode lip ring 60 and the outer anode metal ring 50 , and between the cathode fuel nozzle 30 and the inner anode metal ring 40 . The fuel injected by the cathode fuel nozzle 30 is mixed with the air flowing through the first guide vane 12 of the inner swirler 10 to form a mixed gas, and the mixed gas contacts the first formed between the cathode fuel nozzle 30 and the inner anode metal ring 40 A group of annular plasma arcs are ignited afterward; when the ignited mixture continues to move backward, the air flowing through the first guide vanes 12 of the outer swirler 20 is mixed into the underburned mixture, adding The mixture of two streams of swirling air is ignited again when it contacts the second group of annular plasma arcs formed between the cathode lip ring 60 and the outer anode metal ring 50, the combustion is enhanced, and the mixture is fully burned to form a stable high temperature and high pressure gas. The invention adopts two-stage swirl blending and two sets of annular arc discharge methods to fully mix the fuel and air, and at the same time fully crack and burn the mixed gas, and inject active particles, which improves the reliability of ignition and has more advantages. The high stable ignition range provides a guarantee for the stable operation of the combustion chamber to a great extent. Simultaneously, the present invention has simple structure and strong practicability, greatly improves the ignition performance of the engine, and meets the great demand of the country for developing advanced aero-engines. It is applied to other fields involving sliding arc plasma discharge.

The above is only a preferred embodiment of the invention, and does not limit the invention in any way. All simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the invention still belong to the protection of the technical solution of the invention. within range.

Claims (10)

1. A three-dimensional rotating sliding arc plasma actuator combined with single and double channels, characterized in that it includes: an inner swirler (10), an outer swirler (20), a cathode fuel nozzle (30), an inner swirler anode metal ring (40), outer anode metal ring (50) and cathode lip ring (60), The cathode fuel nozzle (30) is fixedly installed on the inner swirler (10), and the inner anode metal ring (40) and the outer anode metal ring (50) are both arranged on the inner swirler (10 ), the cathode lip ring (60) is set on the outer cyclone (20); The inner swirler (10) includes a fuel nozzle interface (11), a first guide vane (12) and an inner ring wall (13), and the fuel nozzle interface (11) is arranged on the inner ring wall (13) One end of the first guide vane (12) is fixedly connected to the outer wall of the fuel nozzle interface (11), and the other end of the first guide vane (12) is fixed to the inner wall of the inner ring wall (13) connected, the number of the first guide vanes (12) is multiple, and the multiple first guide vanes (12) are evenly arranged along the inner circumference of the inner ring wall (13), and the cathode fuel nozzle (30) Set in the fuel nozzle interface (11), the inner anode metal ring (40) is set on the inner wall of the inner ring wall (13), and between the cathode fuel nozzle (30) and the inner anode metal ring (40) When a voltage is applied between them, it is used to generate a plasma arc in the space between the cathode fuel nozzle (30) and the inner anode metal ring (40), and the outer anode metal ring (50) is arranged on the inner ring wall (13 ) on the outer wall; The outer swirler (20) includes a second guide vane (21) and an outer ring wall (22), the outer ring wall (22) is arranged outside the inner ring wall (13), and the second One end of the guide vane (21) is fixedly connected to the outer wall of the inner ring wall (13), and the other end of the second guide vane (21) is fixedly connected to the inner wall of the outer ring wall (22). The number of flow vanes (21) is multiple, and the plurality of second guide vanes (21) are evenly arranged along the inner circumference of the outer ring wall (22), and the cathode lip ring (60) is fixedly arranged on the outer ring wall (22) and located outside the outer anode metal ring (50), and when a voltage is applied between the outer anode metal ring (50) and the cathode lip ring (60), it is used for the external anode metal ring (50 ) and the cathode lip ring (60) generates a plasma arc in the space. 2. A three-dimensional rotary sliding arc plasma actuator combined with single and dual channels according to claim 1, characterized in that, the inner ring wall (13) includes an inner ring wall body (13-1) and a An insulating ring (13-2) for fixing the inner anode metal ring (40) and the outer anode metal ring (50), the insulating ring (13-2) includes an insulating ring body (13-21), an insulating ring installation protrusion platform (13-22), inner annular boss (13-23), outer annular boss (13-24), inner anode ring slot (13-25) and outer anode ring slot (13- 26), the insulating ring installation boss (13-22) is set on the bottom of the insulating ring body (13-21) and is used to install the insulating ring (13-2) on the inner ring wall body (13-1) The top, the top of the insulating ring (13-2) extends inwardly to form the inner annular boss (13-23) and outwardly to form the outer annular boss (13-24), and the inner anode ring-shaped groove (13-25) is set at the bottom of the inner annular boss (13-23) and the opening of the inner anode ring groove (13-25) faces downward, and the outer anode ring groove (13-25) 26) It is set at the bottom of the outer annular boss (13-24) and the opening of the outer anode annular slot (13-26) faces downward, and the upper end of the inner ring wall body (13-1) is opened with An annular insulating ring installation groove matched with the insulating ring installation boss (13-22). 3. A three-dimensional rotary sliding arc plasma actuator combining single and dual channels according to claim 2, characterized in that the cathode lip ring (60) is a convergent and diffuse hollow rotary body, which includes an upper section The diverging section (61) and the converging section (62) of the lower section, the diffusing section (61) and the converging section (62) are integrally structured, the lower part of the converging section (62) and the top of the outer ring wall (22) Fixed connection. 4. A three-dimensional rotary sliding arc plasma actuator combining single and dual channels according to claim 3, characterized in that, the thickness of the cathode lip ring (60) is 1 mm to 3 mm, and the cathode lip ring (60) is The height of the ring (60) is 12mm~16mm; the inner diameter of the lower opening of the convergent section (62) is 28mm~32mm, the height of the convergent section (62) is 8mm~12mm, and the busbar of the convergent section (62) The included angle with the central axis is α, and the α is 5-15°; the diffusion section (61) is a thin-walled annular lip with a gradually larger opening, and the expansion angle of the diffusion section (61) is β, the β is 80°~100°, the inner diameter of the lower opening of the diffusion section (61) is 25mm~29mm; the height of the diffusion section (61) is 2mm~6mm. 5. A three-dimensional rotary sliding arc plasma exciter combined with single and double channels according to any one of claims 2 to 4, characterized in that the insulating ring (13-2) is a convergent hollow gyrator , the central line contraction angle of the insulating ring (13-2) is ψ, the ψ is 5°~15°, the inner diameter of the lower end surface of the insulating ring (13-2) is 21mm~25mm, and the insulating ring (13-2) has a height of 6 mm to 10 mm, and the thickness of the insulating ring body (13-21) is 0.4 mm to 0.8 mm. 6. A three-dimensional rotary sliding arc plasma exciter combined with single and dual channels according to any one of claims 2 to 4, characterized in that the inner diameter of the inner annular boss (13-23) is 21mm ~25mm, the thickness of the top of the insulating ring (13-2) is 1.4mm~1.8mm, the height of the inner annular boss (13-23) and the outer annular boss (13-24) are the same and both are 0.3 mm~0.7mm. 7. A three-dimensional rotating sliding arc plasma exciter combined with single and double channels according to any one of claims 2 to 4, characterized in that the outer anode ring-shaped slot (13-26) is An annular groove, the outer diameter of the outer anode annular groove (13-26) is 20mm~24mm, the thickness of the outer anode annular groove (13-26) is 0.2mm~0.4mm, the The depth of the external anode ring type slot (13-26) is 0.2mm~0.4mm; The inner anode ring-type slot (13-25) is an annular slot, the inner diameter of the inner anode ring-type slot (13-25) is 18mm~22mm, and the inner anode ring-type slot (13 -25) has a thickness of 0.2mm~0.4mm, and the depth of the inner anode ring-shaped groove (13-25) is 0.2mm~0.4mm. 8. A three-dimensional rotary sliding arc plasma exciter combined with single and double channels according to any one of claims 2 to 4, characterized in that the inner anode metal ring (40) is tapered Hollow rotary body, the inner anode metal ring (40) is made of tungsten copper alloy material, the thickness of the inner anode metal ring (40) is 0.3mm~0.7mm, the inner anode metal ring (40 ) the inner diameter of the lower end surface is 20mm~24mm, the height of the inner anode metal ring (40) is 6mm~10mm, the convergence angle of the inner anode metal ring (40) is γ, and the γ is 5°~ 15°, the top of the inner anode metal ring (40) is embedded in the inner anode ring type slot (13-25); The outer anode metal ring (50) is a tapered hollow rotating body, the outer anode metal ring (50) is made of tungsten copper alloy material, and the thickness of the outer anode metal ring (50) is 0.3mm~0.8mm, the inner diameter of the lower end surface of the outer anode metal ring (50) is 22mm~26mm, and the included angle between the busbar of the outer anode metal ring (50) and the shaft axis is 5°~ 15° The height of the outer anode metal ring (50) is 6mm~10mm, and the top of the outer anode metal ring (50) is embedded in the outer anode ring-shaped slot (13-26). 9. A three-dimensional rotary sliding arc plasma exciter combined with single and dual channels according to any one of claims 2 to 4, characterized in that the inner diameter of the insulating ring mounting boss (13-22) is 21mm~25mm, the thickness of the insulating ring installation boss (13-22) is 0.4mm~0.8mm, and the height of the insulation ring installation boss (13-22) is 0.3mm~0.7mm. 10. According to claim 9, a three-dimensional rotary sliding arc plasma exciter combined with single and double circuits is characterized in that it further comprises an external anode terminal and an internal anode terminal, and the external anode terminal The upper end of the upper end is connected with the bottom of the outer anode metal ring (50) through threads, the upper end of the inner anode terminal is connected with the bottom of the inner anode metal ring (40) through threads, and the inner ring wall (13) A first through hole for the passage of the external anode terminal and a second through hole for the passage of the internal anode terminal are opened, the lower end of the external anode terminal passes through the first through hole, and the inner The lower end of the road anode terminal passes through the second through hole.

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