CN113153539B - Single-double-circuit combined three-dimensional rotating sliding arc plasma exciter - Google Patents
Single-double-circuit combined three-dimensional rotating sliding arc plasma exciter Download PDFInfo
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- CN113153539B CN113153539B CN202110298162.8A CN202110298162A CN113153539B CN 113153539 B CN113153539 B CN 113153539B CN 202110298162 A CN202110298162 A CN 202110298162A CN 113153539 B CN113153539 B CN 113153539B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
- F02C7/266—Electric
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
Technical Field
The invention relates to the technical field of aeronautical power plasma enhanced combustion, in particular to a single-double-circuit combined three-dimensional rotary sliding arc plasma exciter.
Background
At present, most aviation turbine engine combustion chambers on aircrafts adopt an electric spark electric nozzle ignition mode, and the mode has the advantages of small ignition energy, narrow ignition range and low ignition success rate, can not meet the requirements of the combustion chambers under a large-range severe condition, and restricts the improvement of the performance of the aviation engines.
The plasma ignition combustion-supporting technology is a novel technology which is rising in recent years, and the plasma has unique properties such as thermal effect, chemical effect and pneumatic effect. Research results show that the adoption of plasma ignition can just meet the requirement of the combustion chamber for ignition in a large range. Has the following advantages: greatly widens the ignition boundary, shortens the ignition delay time, improves the ignition reliability, improves the combustion efficiency of the combustion chamber, improves the thermal uniformity of the outlet of the combustion chamber, reduces the pollutant emission, improves the fuel atomization effect and the like. The sliding arc-based plasma ignition and combustion-supporting technology has great potential in the aspect of high-altitude ignition due to the advantages of high ignition energy and strong molecular activity. However, the currently designed sliding arc plasma exciters at the head of the combustion chamber are of a single-arc structure, and only one sliding arc acts on the gas mixing area at one moment.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a single-double-circuit combined three-dimensional rotary sliding arc plasma exciter which adopts an inner cyclone layer and an outer cyclone layer, wherein the inner cyclone layer and the outer cyclone layer can work independently to ensure the ignition combustion supporting under the common working condition, and can also work simultaneously to ensure the ignition combustion supporting under the extremely severe working condition, thereby not only ensuring the reliability and the stability of the ignition of the mixed gas, but also fully cracking and burning the mixed gas, injecting active particles, widening the flameout boundary of a combustion chamber and improving the combustion efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme: a single dual path combined three dimensional rotating sliding arc plasma exciter comprising: the device comprises an inner cyclone, an outer cyclone, a cathode fuel nozzle, an inner anode metal ring, an outer anode metal ring and a cathode lip ring;
the cathode fuel nozzle is fixedly arranged on the inner cyclone, the inner anode metal ring and the outer anode metal ring are arranged on the inner cyclone, and the cathode lip ring is arranged on the outer cyclone;
the inner-layer swirler comprises a fuel nozzle interface, a first guide vane and an inner annular wall, wherein the fuel nozzle interface is arranged on the inner side of the inner annular wall, one end of the first guide vane is fixedly connected with the outer wall of the fuel nozzle interface, the other end of the first guide vane is fixedly connected with the inner wall of the inner annular wall, the number of the first guide vanes is multiple, the first guide vanes are uniformly distributed along the circumference of the inner side of the inner annular wall, the cathode fuel nozzle is arranged in the fuel nozzle interface, the inner-way anode metal ring is arranged on the inner wall of the inner annular wall, and when voltage is applied between the cathode fuel nozzle and the inner-way anode metal ring, plasma arc is generated in a space between the cathode fuel nozzle and the inner-way anode metal ring, and the outer-way anode metal ring is arranged on the outer wall of the inner annular wall;
the outer cyclone comprises second guide vanes and an outer annular wall, the outer annular wall is arranged on the outer side of the inner annular wall, one end of each second guide vane is fixedly connected with the outer wall of the inner annular wall, the other end of each second guide vane is fixedly connected with the inner wall of the outer annular wall, the number of the second guide vanes is multiple, the second guide vanes are uniformly distributed along the circumference of the inner side of the outer annular wall, the cathode lip-shaped ring is fixedly arranged at the top of the outer annular wall and is positioned on the outer side of the outer anode metal ring, and when voltage is applied between the outer anode metal ring and the cathode lip-shaped ring, plasma arc is generated in a space between the outer anode metal ring and the cathode lip-shaped ring.
The three-dimensional rotating sliding arc plasma exciter with single-double-path combination is characterized in that the inner annular wall comprises an inner annular wall body and an insulating ring used for fixing an inner anode metal ring and an outer anode metal ring, the insulating ring comprises an insulating ring body, an insulating ring installation boss, an inner annular boss, an outer annular boss, an inner anode annular clamping groove and an outer anode annular clamping groove, the insulating ring installation boss is arranged at the bottom of the insulating ring body and used for installing the insulating ring at the top end of the inner annular wall body, the top of the insulating ring respectively extends inwards to form the inner annular boss and extends outwards to form the outer annular boss, the inner anode annular clamping groove is arranged at the bottom of the inner annular boss and the opening of the inner anode annular clamping groove faces downwards, the outer anode annular clamping groove is arranged at the bottom of the outer annular boss and the opening of the outer anode annular clamping groove faces downwards, and the annular insulating ring installation boss matched with the insulating ring installation boss is arranged at the upper end of the inner annular wall body.
The single-double-path combined three-dimensional rotating sliding arc plasma exciter is characterized in that the cathode lip ring is a hollow revolving body in a convergent and diffusion shape and comprises a diffusion section at the upper section and a convergence section at the lower section, the diffusion section and the convergence section are of an integrated structure, and the lower part of the convergence section is fixedly connected with the top of the outer annular wall.
The single-path and double-path combined three-dimensional rotating sliding arc plasma exciter is characterized in that the thickness of the cathode lip ring is 1 mm-3 mm, and the height of the cathode lip ring is 12 mm-16 mm; the inner diameter of the opening at the lower end of the convergence section is 28-32 mm, the height of the convergence section is 8-12 mm, the included angle between the generatrix of the convergence section and the central axis is alpha, and the alpha is 5-15 degrees; the diffusion section is a thin-wall annular lip with an opening gradually enlarged, the expansion angle of the diffusion section is beta, the beta is 80-100 degrees, and the inner diameter of the opening at the lower end of the diffusion section is 25-29 mm; the height of the diffusion section is 2 mm-6 mm.
The single-double-path combined three-dimensional rotating sliding arc plasma exciter is characterized in that the insulating ring is a convergent hollow rotator, the central line shrinkage angle of the insulating ring is phi, phi is 5-15 degrees, the inner diameter of the lower end face of the insulating ring is 21-25 mm, the height of the insulating ring is 6-10 mm, and the thickness of the insulating ring body is 0.4-0.8 mm.
The three-dimensional rotating sliding arc plasma exciter with single-path and double-path combination is characterized in that the inner diameter of the inner annular boss is 21-25 mm, the thickness of the top of the insulating ring is 1.4-1.8 mm, and the heights of the inner annular boss and the outer annular boss are the same and are 0.3-0.7 mm.
The single-double-path combined three-dimensional rotary sliding arc plasma exciter is characterized in that the outer anode annular clamping groove is an annular groove, the outer diameter of the outer anode annular clamping groove is 20-24 mm, the thickness of the outer anode annular clamping groove is 0.2-0.4 mm, and the depth of the outer anode annular clamping groove is 0.2-0.4 mm;
the inner-path anode annular clamping groove is an annular groove, the inner diameter of the inner-path anode annular clamping groove is 18-22 mm, the thickness of the inner-path anode annular clamping groove is 0.2-0.4 mm, and the depth of the inner-path anode annular clamping groove is 0.2-0.4 mm.
The single-double-path combined three-dimensional rotary sliding arc plasma exciter is characterized in that the inner-path anode metal ring is a tapered hollow revolving body, the inner-path anode metal ring is made of tungsten-copper alloy material, the thickness of the inner-path anode metal ring is 0.3-0.7 mm, the inner diameter of the lower end face of the inner-path anode metal ring is 20-24 mm, the height of the inner-path anode metal ring is 6-10 mm, the convergence angle of the inner-path anode metal ring is gamma, the gamma is 5-15 degrees, and the top of the inner-path anode metal ring is embedded in an inner-path anode ring-shaped clamping groove;
the outer anode metal ring is a tapered hollow revolving body, the outer anode metal ring is made of tungsten copper alloy materials, the thickness of the outer anode metal ring is 0.3 mm-0.8 mm, the inner diameter of the lower end face of the outer anode metal ring is 22 mm-26 mm, an included angle between a bus of the outer anode metal ring and an axis is 5-15 degrees, the height of the outer anode metal ring is 6 mm-10 mm, and the top of the outer anode metal ring is embedded in an outer anode ring-shaped clamping groove.
The three-dimensional rotating sliding arc plasma exciter with the combination of the single circuit and the double circuits is characterized in that the inner diameter of the insulating ring installation boss is 21 mm-25 mm, the thickness of the insulating ring installation boss is 0.4 mm-0.8 mm, and the height of the insulating ring installation boss is 0.3 mm-0.7 mm.
The single-double-circuit combined three-dimensional rotary sliding arc plasma exciter is characterized by further comprising an outer anode binding post and an inner anode binding post, wherein the upper end of the outer anode binding post is connected with the bottom of an outer anode metal ring through threads, the upper end of the inner anode binding post is connected with the bottom of an inner anode metal ring through threads, a first through hole for the outer anode binding post to pass through and a second through hole for the inner anode binding post to pass through are formed in the inner annular wall, the lower end of the outer anode binding post passes through the first through hole, and the lower end of the inner anode binding post passes through the second through hole.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the inner and outer cyclone, the inner and outer electrode groups can generate plasma arc at the same time and can work independently, thereby meeting the requirements of ignition and combustion supporting of the aeroengine in different states, 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 and improving the combustion efficiency.
2. The invention is arranged at the cyclone position in front of the flame tube of the combustion chamber of the aeroengine, does not change the original structure of the combustion chamber, and basically does not influence the flow field characteristics of head air intake.
3. The invention has reasonable arrangement of parts, ingenious implementation mode of two groups of annular arc discharge and ignition of internal and external plasmas, ensures the reliability and stability of the ignition of the mixed gas, can realize the function of the traditional combustion chamber ignition device and greatly simplifies the structural composition of the combustion chamber. The stable combustion range of the engine is effectively widened, the ignition boundary of the combustion chamber is widened, the combustion efficiency is improved, and a reliable scheme is provided for solving the ignition problem of the engine in extreme environments such as difficult ignition at high altitude and the like.
The invention is described in further detail below with reference to the drawings and examples.
Drawings
Fig. 1 is a perspective exploded view of the present invention.
Figure 2 is a perspective cross-sectional view of the present invention.
Figure 3 is a front cross-sectional view of the present invention.
Fig. 4 is a front cross-sectional view of an insulating ring of the present invention.
Reference numerals illustrate:
| 10-an inner cyclone; | 11-a fuel nozzle interface; | 12-a first guide vane; |
| 13-an inner annular wall; | 13-1-an inner annular wall body; | 13-2-insulating ring; |
| 13-21-an insulating ring body; | 13-22, an insulating ring installation boss; | 13-23-inner annular boss; |
| 13-24-outer annular boss; | 13-25-an inner anode ring-shaped clamping groove; | 13-26, an external anode ring-shaped clamping groove; |
| 20-an outer cyclone; | 21-a second guide vane; | 22-an outer annular wall; |
| 30-cathode fuel nozzle; | 40-an inner anode metal ring; | 50-an outer anode metal ring; |
| 60-cathode lip ring; | 61-a diffusion section; | 62-convergent section. |
Description of the embodiments
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the invention is susceptible of embodiment in the drawings, it is to be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided to provide a more thorough and complete understanding of the invention. It should be understood that the drawings and embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the present invention.
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between different devices, modules, or units and not for limiting the order or interdependence of the functions performed by such devices, modules, or units.
In order to increase the ignition action area of the sliding arc, enhance the ignition energy and further increase the high-altitude ignition capability of the sliding arc plasma exciter, it is necessary to design a sliding arc plasma exciter with a multi-arc structure. Through the research and experiment of the inventor, the sliding arc discharge of the multi-arc structure shows great advantages in the ignition and combustion supporting aspect of the combustion chamber of the aero-engine, and the advantages are that: the energy utilization rate of the power supply is effectively improved, the contact area of the plasma and the oil-gas mixture is greatly increased, the initial ignition area is increased, and the ignition capability of the sliding arc plasma exciter is effectively improved. Meanwhile, the device still has the advantages of single-arc plasma promotion of fuel atomization and cracking, wide working conditions, no specific requirements on the inlet airflow of the combustion chamber, simple electrode structure, less influence of the electric arc on the inlet airflow of the combustion chamber and the like. Therefore, the inventor designs a novel double-path three-dimensional rotary sliding arc exciter based on the head of the aeronautical combustion chamber by combining the sliding arc discharge characteristics of the multi-arc structure. As shown in fig. 1 and 2, it includes: the inner-layer cyclone 10, the outer-layer cyclone 20, the cathode fuel nozzle 30, an inner-way anode metal ring 40, an outer-way anode metal ring 50 and a cathode lip ring 60, wherein the cathode fuel nozzle 30 is fixedly arranged on the inner-layer cyclone 10, the inner-way anode metal ring 40 and the outer-way anode metal ring 50 are both arranged on the inner-layer cyclone 10, and the cathode lip ring 60 is arranged on the outer-layer cyclone 20;
the inner cyclone 10 comprises a fuel nozzle interface 11, a first guide vane 12 and an inner annular wall 13, wherein the fuel nozzle interface 11 is arranged on the inner side of the inner annular wall 13, one end of the first guide vane 12 is fixedly connected with the outer wall of the fuel nozzle interface 11, the other end of the first guide vane 12 is fixedly connected with the inner wall of the inner annular wall 13, a plurality of first guide vanes 12 are arranged, the first guide vanes 12 are uniformly distributed along the circumference of the inner side of the inner annular 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 annular wall 13, and when a voltage is applied between the cathode fuel nozzle 30 and the inner anode metal ring 40, a plasma arc is generated in a 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 outer wall of the inner annular wall 13;
the outer cyclone 20 comprises a second guide vane 21 and an outer annular wall 22, the outer annular wall 22 is arranged on the outer side of the inner annular wall 13, one end of the second guide vane 21 is fixedly connected with the outer wall of the inner annular wall 13, the other end of the second guide vane 21 is fixedly connected with the inner wall of the outer annular wall 22, a plurality of second guide vanes 21 are arranged, the second guide vanes 21 are uniformly distributed along the circumference of the inner side of the outer annular wall 22, the cathode lip ring 60 is fixedly arranged on the top of the outer annular wall 22 and is positioned on the outer side of the outer anode metal ring 50, and when voltage is applied between the outer anode metal ring 50 and the cathode lip ring 60, plasma arc is generated in a space between the outer anode metal ring 50 and the cathode lip ring 60.
In this embodiment, an inner and outer cyclone is used, i.e. a two-stage cyclone, so that the fuel and air can be more fully mixed. In the inner cyclone 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; in the outer cyclone 20, 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 groups of electrodes can work independently, so that the ignition combustion supporting under the general condition is met, and the normal combustion in the combustion chamber is ensured with lower power; the device can work simultaneously, meets the ignition and combustion supporting of the combustion chamber under extreme working conditions, greatly widens the flameout boundary of the aeroengine and improves the flight height of the aircraft. The method not only ensures the reliability and stability of the ignition of the mixed gas, but also can fully crack and burn the mixed gas and inject active particles, widens the ignition boundary of the combustion chamber and improves the combustion efficiency.
As shown in fig. 1 to 4, the inner annular wall 13 includes an inner annular 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 insulating 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 annular clamping groove 13-25 and an outer anode annular clamping groove 13-26, the insulating ring mounting boss 13-22 is disposed at the bottom of the insulating ring body 13-21 and is used for mounting the insulating ring 13-2 on the top end of the inner annular wall body 13-1, the top of the insulating ring 13-2 extends inwards to form an inner annular boss 13-23 and extends outwards to form an outer annular boss 13-24, the inner anode annular clamping groove 13-25 is disposed at the bottom of the inner annular boss 13-23 and the opening of the inner anode annular clamping groove 13-25 is downward, the outer anode annular clamping groove 13-26 is disposed at the bottom of the outer annular boss 13-24 and is disposed at the bottom of the opening end of the outer annular boss 13-24 and is matched with the insulating ring mounting groove 13-1.
In this embodiment, the insulating ring 13-2 separates the inner and outer anode metal rings and performs an insulating function, so that the two-stage discharge does not interfere with each other in the process of generating plasma.
As shown in fig. 2, the cathode lip ring 60 is a hollow revolution body with a convergent-divergent shape, and comprises a divergent section 61 at an upper section and a convergent section 62 at a lower section, wherein the divergent section 61 and the convergent section 62 are integrally formed, and a lower part of the convergent section 62 is fixedly connected with a top of the outer annular wall 22.
In this embodiment, the thickness of the cathode lip ring 60 is 1 mm-3 mm, and the height of the cathode lip ring 60 is 12 mm-16 mm; the inner diameter of the opening at the lower end of the convergence section 62 is 28-32 mm, the height of the convergence section 62 is 8-12 mm, the included angle between the generatrix of the convergence section 62 and the central axis is alpha, and the alpha is 5-15 degrees; the diffuser 61 is a thin-wall annular lip with an opening gradually enlarged, the expansion angle of the diffuser 61 is beta, the beta is 80-100 degrees, and the inner diameter of the opening at the lower end of the diffuser 61 is 25-29 mm; the height of the diffusion section 61 is 2mm to 6mm.
Specifically, the overall thin wall thickness of the cathode lip ring 60 in this embodiment is 1.2mm and the overall height distance is 14mm. The inner diameter of the opening at the lower end of the convergent section 62 takes a value of 30.5mm, the wall thickness is 1.2mm, the height is 10.4mm, the included angle alpha between the generatrix of the convergent section 62 and the central axis is 10 degrees, the inner diameter of the divergent section 61 is 27mm, the height is 3.6mm, and the expansion angle beta is 90 degrees.
The cathode lip ring 60 is embedded with a cathode lip ring mounting groove processed at the upper end of the outer annular wall 22 through a cathode lip ring mounting boss at the bottom end, and is connected with a contraction section at the rear part of the cyclone to form a convergence channel, the cathode lip ring mounting boss is annular, has an inner diameter of 29.00 mm-33.00 mm, a thickness of 0.4 mm-0.8 mm and a height of 0.3 mm-0.7 mm.
Specifically, the inner diameter of the cathode lip ring mounting boss in this embodiment is 31mm, the thickness is 0.6mm, and the height is 0.5mm.
As shown in fig. 2 and 3, the insulating ring 13-2 is a convergent hollow rotator, the shrinkage angle of the central line of the insulating ring 13-2 is ψ, which is 5 ° to 15 °, the inner diameter of the lower end surface of the insulating ring 13-2 is 21mm to 25mm, the height of the insulating ring 13-2 is 6mm to 10mm, and the thickness of the insulating ring body 13-21 is 0.4mm to 0.8mm.
Specifically, in this embodiment, the center line contraction angle ψ of the insulating ring 13-2 is 10 °, the inner diameter of the lower end face of the insulating ring 13-2 is 23.4mm, the thickness is 0.65mm, and the height is 8.5mm.
In this embodiment, the inner diameter of the inner annular boss 13-23 is 21 mm-25 mm, the thickness of the top of the insulating ring 13-2 is 1.4 mm-1.8 mm, and the heights of the inner annular boss 13-23 and the outer annular boss 13-24 are the same and are all 0.3 mm-0.7 mm.
Specifically, the outer diameter of the outer annular boss 13-24 in this embodiment is 22.7mm, the thickness is 1.65mm, and the height is 0.5mm.
In this embodiment, the outer anode annular clamping groove 13-26 is an annular groove, the outer diameter of the outer anode annular clamping groove 13-26 is 20 mm-24 mm, the thickness of the outer anode annular clamping groove 13-26 is 0.2 mm-0.4 mm, and the depth of the outer anode annular clamping groove 13-26 is 0.2 mm-0.4 mm;
specifically, in this embodiment, the outside diameter of the outside anode mounting groove 21 is 21.7mm, the thickness is 0.3mm, and the depth is 0.3mm.
The inner-path anode annular clamping groove 13-25 is an annular groove, the inner diameter of the inner-path anode annular clamping groove 13-25 is 18-22 mm, the thickness of the inner-path anode annular clamping groove 13-25 is 0.2-0.4 mm, and the depth of the inner-path anode annular clamping groove 13-25 is 0.2-0.4 mm.
Specifically, in this embodiment, the inner diameter of the inner anode mounting groove 22 is 19.8mm, the thickness is 0.3mm, and the depth is 0.3mm.
In this embodiment, the inner-path anode metal ring 40 is a tapered hollow revolution body, the inner-path anode metal ring 40 is made of tungsten copper alloy material, the thickness of the inner-path anode metal ring 40 is 0.3 mm-0.7 mm, the inner diameter of the lower end surface of the inner-path anode metal ring 40 is 20 mm-24 mm, the height of the inner-path anode metal ring 40 is 6 mm-10 mm, the convergence angle of the inner-path anode metal ring 40 is gamma, gamma is 5 ° to 15 °, and the top of the inner-path anode metal ring 40 is embedded in the inner-path anode annular clamping groove 13-25.
The top end of the inner anode metal ring 40 is a boss annular structure, and the size of the boss annular structure is matched with that of the inner anode annular clamping groove 13-25.
The outer anode metal ring 50 is a tapered hollow revolving body, the outer anode metal ring 50 is made of tungsten copper alloy material, the thickness of the outer anode metal ring 50 is 0.3 mm-0.8 mm, the inner diameter of the lower end face of the outer anode metal ring 50 is 22 mm-26 mm, an included angle between a bus of the outer anode metal ring 50 and an axis is 5-15 degrees, the height of the outer anode metal ring 50 is 6 mm-10 mm, and the top of the outer anode metal ring 50 is embedded in the outer anode ring-shaped clamping groove 13-26.
The outer anode metal ring 50 is embedded in the outer anode ring-shaped clamping groove 13-26 of the outer wall surface of the insulating ring 13-2 through an outer anode metal ring mounting boss at the top end, the outer anode metal ring mounting boss is annular, the outer diameter is 20 mm-24 mm, the thickness is 0.2 mm-0.4 mm, and the height is 0.2 mm-0.4 mm.
Specifically, in this embodiment, the thickness of the outer anode metal ring 50 is 0.5mm, the inner diameter of the lower end face is 24.7mm, the height is 8.5mm, the included angle between the bus bar of the outer anode metal ring 50 and the axis of the shaft 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 at the bottom of the outer anode metal ring 50, which is connected with the outer anode binding post, is 0.3mm, the depth is 0.5mm, and the center of the threaded hole is 0.2mm away from the outer wall surface of the outer anode metal ring.
The top end of the outer anode metal ring 50 is also a boss annular structure, and the size of the boss annular structure is matched with that of the outer anode annular clamping grooves 13-26.
In this embodiment, the inner diameter of the insulating ring mounting boss 13-22 is 21 mm-25 mm, the thickness of the insulating ring mounting boss 13-22 is 0.4 mm-0.8 mm, and the height of the insulating ring mounting boss 13-22 is 0.3 mm-0.7 mm.
Specifically, in this embodiment, the inner diameter of the insulating ring mounting boss 13-22 is 23.4mm, the thickness is 0.65mm, and the height is 0.5mm.
As shown in fig. 3, the single-double-path combined three-dimensional rotary sliding arc plasma exciter further comprises an external anode binding post and an internal anode binding post, wherein the upper end of the external anode binding post is connected with the bottom of the external anode metal ring 50 through threads, the upper end of the internal anode binding post is connected with the bottom of the internal anode metal ring 40 through threads, a first through hole for the external anode binding post to pass through and a second through hole for the internal anode binding post to pass through are formed in the internal annular wall 13, the lower end of the external anode binding post passes through the first through hole, and the lower end of the internal anode binding post passes through the second through hole. The first through holes and the second through holes are uniformly distributed on the inner annular wall 13, the diameters of the first through holes and the second through holes are 0.2 mm-0.4 mm, the direction of the opening is parallel to the direction of a bus of the inner annular wall 13, the distance between the center of the first through holes and the outer wall surface of the bottom end of the inner annular wall 13 is 0.2 mm-0.4 mm, and the distance between the center of the second through holes and the inner wall surface of the bottom end of the inner annular wall 13 is 0.2 mm-0.4 mm.
The working principle of the invention is as follows: the inner and outer anode metal rings 40 and 50 are connected to the high voltage line by inner and outer anode binding posts, respectively, and the cathode lip ring 60 and the cathode fuel nozzle 30 are grounded to the casing, thus forming two sets of annular plasma sliding arcs 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, respectively. The fuel injected by the cathode fuel nozzle 30 is mixed with the air flowing through the first guide vane 12 of the inner cyclone 10 to form a mixed gas, and the mixed gas is ignited after contacting with a first group of annular plasma arcs formed between the cathode fuel nozzle 30 and the inner anode metal ring 40; when the ignited mixture continues to move backward, the air flowing through the first guide vane 12 of the outer cyclone 20 is mixed into the insufficiently combusted mixture, and the mixture added with two swirled air is re-ignited when contacting the second set of annular plasma arcs formed between the cathode lip ring 60 and the outer anode metal ring 50, so that combustion is intensified, and the mixture is fully combusted to form stable high-temperature and high-pressure fuel gas. The invention adopts the two-stage rotational flow mixing and two groups of annular arc discharge modes, so that the fuel oil and the air can be fully mixed, the mixed gas can be fully cracked and combusted, active particles are injected, the ignition reliability is improved, a higher stable ignition range is provided, and the guarantee is provided for the stable operation of the combustion chamber to a great extent. Meanwhile, the invention has simple structure and strong practicability, greatly improves the ignition performance of the engine, meets the important requirements of national development of advanced aeroengines, not only promotes the national military and civil aircraft to develop to higher level, but also can be applied to other fields related to sliding arc plasma discharge.
The foregoing description is only a preferred embodiment of the invention, and is not intended to limit the invention in any way, and any simple modification, variation and equivalent structural transformation made to the above embodiment according to the technical matter of the invention still fall within the scope of the technical scheme of the invention.
Claims (10)
1. A single-double-path combined three-dimensional rotating sliding arc plasma exciter, comprising: an inner cyclone (10), an outer cyclone (20), a cathode fuel nozzle (30), an inner anode metal ring (40), an outer anode metal ring (50) and a cathode lip ring (60),
the cathode fuel nozzle (30) is fixedly arranged on the inner cyclone (10), the inner anode metal ring (40) and the outer anode metal ring (50) are arranged on the inner cyclone (10), and the cathode lip ring (60) is arranged on the outer cyclone (20);
the inner cyclone (10) comprises a fuel nozzle interface (11), first guide vanes (12) and an inner annular wall (13), wherein the fuel nozzle interface (11) is arranged on the inner side of the inner annular wall (13), one end of each first guide vane (12) is fixedly connected with the outer wall of the fuel nozzle interface (11), the other end of each first guide vane (12) is fixedly connected with the inner wall of the inner annular wall (13), the plurality of first guide vanes (12) are uniformly distributed along the circumference of the inner side of the inner annular wall (13), the cathode fuel nozzles (30) are arranged in the fuel nozzle interface (11), the inner anode metal rings (40) are arranged on the inner wall of the inner annular wall (13), and when a voltage is applied between the cathode fuel nozzles (30) and the inner anode metal rings (40), the inner anode metal rings (50) are used for generating a plasma arc in a space between the cathode fuel nozzles (30) and the inner anode metal rings (40), and the outer anode metal rings (50) are arranged on the outer wall of the inner annular wall (13);
the outer cyclone (20) comprises second guide vanes (21) and an outer annular wall (22), the outer annular wall (22) is arranged on the outer side of the inner annular wall (13), one end of each second guide vane (21) is fixedly connected with the outer wall of the inner annular wall (13), the other end of each second guide vane (21) is fixedly connected with the inner wall of the outer annular wall (22), the plurality of second guide vanes (21) are uniformly distributed along the circumference of the inner side of the outer annular wall (22), the cathode lip ring (60) is fixedly arranged at the top of the outer annular wall (22) and is positioned on the outer side of the outer anode metal ring (50), and plasma arc is generated in a space between the outer anode metal ring (50) and the cathode lip ring (60) when voltage is applied between the outer anode metal ring (50) and the cathode lip ring (60).
2. A three-dimensional rotary slip arc plasma actuator combined in one-way or two-way, according to claim 1, characterized in that the inner annular wall (13) comprises an inner annular wall body (13-1) and an insulating ring (13-2) for fixing an inner anode metal ring (40) and an outer anode metal ring (50), the insulating ring (13-2) comprises 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 annular clamping groove (13-25) and an outer anode annular clamping groove (13-26), the insulating ring mounting boss (13-22) is arranged at the bottom of the insulating ring body (13-21) and is used for mounting the insulating ring (13-2) at the top end of the inner annular wall body (13-1), the top of the insulating ring (13-2) extends inwards to form the inner annular boss (13-23) and outwards to form the outer annular boss (13-24), the inner annular clamping groove (13-25) opens towards the bottom of the inner annular boss (13-25), the outer anode annular clamping groove (13-26) is formed in the bottom of the outer annular boss (13-24), the opening of the outer anode annular clamping groove (13-26) faces downwards, and an annular insulating ring mounting groove matched with the insulating ring mounting boss (13-22) is formed in the upper end of the inner annular wall body (13-1).
3. A single-double path combined three-dimensional rotating slip arc plasma actuator according to claim 2, wherein the cathode lip ring (60) is a converging and diverging hollow body of revolution comprising an upper diverging section (61) and a lower converging section (62), the diverging section (61) and converging section (62) being of unitary construction, the lower portion of the converging section (62) being fixedly connected to the top of the outer annular wall (22).
4. A single-twin combined three-dimensional rotating slip arc plasma actuator according to claim 3, wherein the thickness of the cathode lip ring (60) is 1 mm-3 mm, and the height of the cathode lip ring (60) is 12 mm-16 mm; the inner diameter of the lower end opening of the convergence section (62) is 28-32 mm, the height of the convergence section (62) is 8-12 mm, the included angle between the generatrix of the convergence section (62) and the central axis is alpha, and the alpha is 5-15 degrees; the diffusion section (61) is a thin-wall annular lip with an opening gradually enlarged, the expansion angle of the diffusion section (61) is beta, the beta is 80-100 degrees, and the inner diameter of the opening at the lower end of the diffusion section (61) is 25-29 mm; the height of the diffusion section (61) is 2 mm-6 mm.
5. The single-double-path combined three-dimensional rotating sliding arc plasma exciter according to any one of claims 2 to 4, wherein the insulating ring (13-2) is a convergent hollow revolution body, the central line contraction angle of the insulating ring (13-2) is phi, the phi is 5-15 degrees, the inner diameter of the lower end face of the insulating ring (13-2) is 21-25 mm, the height of the insulating ring (13-2) is 6-10 mm, and the thickness of the insulating ring body (13-21) is 0.4-0.8 mm.
6. A single-double-path combined three-dimensional rotating slip arc plasma actuator according to any of claims 2 to 4, wherein the inner diameter of the inner annular boss (13-23) is 21mm to 25mm, the thickness of the top of the insulating ring (13-2) is 1.4mm to 1.8mm, and the heights of the inner annular boss (13-23) and the outer annular boss (13-24) are the same and are both 0.3mm to 0.7mm.
7. A single-double-path combined three-dimensional rotating sliding arc plasma actuator according to any one of claims 2 to 4, characterized in that the outer anode annular clamping groove (13-26) is an annular groove, the outer diameter of the outer anode annular clamping groove (13-26) is 20 mm-24 mm, the thickness of the outer anode annular clamping groove (13-26) is 0.2 mm-0.4 mm, and the depth of the outer anode annular clamping groove (13-26) is 0.2 mm-0.4 mm;
the inner-path anode annular clamping groove (13-25) is an annular groove, the inner diameter of the inner-path anode annular clamping groove (13-25) is 18-22 mm, the thickness of the inner-path anode annular clamping groove (13-25) is 0.2-0.4 mm, and the depth of the inner-path anode annular clamping groove (13-25) is 0.2-0.4 mm.
8. The single-double-path combined three-dimensional rotating sliding arc plasma exciter according to any one of claims 2 to 4, wherein the inner anode metal ring (40) is a tapered hollow revolving body, the inner anode metal ring (40) is made of tungsten copper alloy material, the thickness of the inner anode metal ring (40) is 0.3 mm-0.7 mm, the inner diameter of the lower end face of the inner anode metal ring (40) is 20 mm-24 mm, the height of the inner anode metal ring (40) is 6 mm-10 mm, the convergence angle of the inner anode metal ring (40) is gamma, the gamma is 5-15 degrees, and the top of the inner anode metal ring (40) is embedded in an inner anode ring-shaped clamping groove (13-25);
the external anode metal ring (50) is a tapered hollow revolving body, the external anode metal ring (50) is made of tungsten copper alloy material, the thickness of the external anode metal ring (50) is 0.3 mm-0.8 mm, the inner diameter of the lower end surface of the external anode metal ring (50) is 22 mm-26 mm, an included angle between a bus of the external anode metal ring (50) and an axis is 5-15 degrees, the height of the external anode metal ring (50) is 6 mm-10 mm, and the top of the external anode metal ring (50) is embedded in the external anode ring-shaped clamping groove (13-26).
9. A single-double-path combined three-dimensional rotating slip arc plasma actuator according to any one of claims 2 to 4, wherein the inner diameter of the insulating ring mounting boss (13-22) is 21mm to 25mm, the thickness of the insulating ring mounting boss (13-22) is 0.4mm to 0.8mm, and the height of the insulating ring mounting boss (13-22) is 0.3mm to 0.7mm.
10. The three-dimensional rotary sliding arc plasma exciter of claim 9, further comprising an outer anode binding post and an inner anode binding post, wherein the upper end of the outer anode binding post is connected with the bottom of the outer anode metal ring (50) through threads, the upper end of the inner anode binding post is connected with the bottom of the inner anode metal ring (40) through threads, a first through hole for the outer anode binding post to pass through and a second through hole for the inner anode binding post to pass through are formed in the inner annular wall (13), the lower end of the outer anode binding post passes through the first through hole, and the lower end of the inner anode binding post passes through the second through hole.
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| CN114340131B (en) * | 2021-12-29 | 2023-08-18 | 中国人民解放军战略支援部队航天工程大学 | Three-dimensional sliding arc plasma generator |
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