CN111511089B - Method for realizing equipment stealth by using plasma jet - Google Patents
Method for realizing equipment stealth by using plasma jet Download PDFInfo
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- CN111511089B CN111511089B CN202010556799.8A CN202010556799A CN111511089B CN 111511089 B CN111511089 B CN 111511089B CN 202010556799 A CN202010556799 A CN 202010556799A CN 111511089 B CN111511089 B CN 111511089B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
- H05H1/2443—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes the plasma fluid flowing through a dielectric tube
Abstract
The invention provides a method for realizing equipment stealth by utilizing plasma jet, which comprises the following steps: step 1: processing a plurality of micropores on the surface of the equipment; step 2: arranging a plurality of electrodes inside the micropores and/or among the micropores to ensure that the periphery of each micropore is provided with a positive electrode and a negative electrode; and step 3: starting the equipment to move, and introducing high-pressure air through the micropore inlet to enable the high-pressure air to flow through an ionization space in the micropore; and 4, step 4: electrifying the electrode, ionizing the high-pressure air into plasma by electrode discharge, and ejecting the plasma out of the micropore outlet in a jet flow mode; along with the movement of the equipment, the plasma jet flows out through the micropore outlet and then is mixed with air moving along the surface of the equipment at a high speed, and the plasma jet flows along the surface of the equipment. The plasma jet emitted by one micropore can cover the surface of equipment with a certain area, and the plasma jets among different micropores are mutually superposed and matched, so that continuous and uniform plasma covering is finally formed on the surface of the equipment.
Description
Technical Field
The invention relates to the technical field of plasma application, in particular to a method for realizing equipment stealth by utilizing plasma jet.
Background
The plasma stealth is a technology for avoiding radar detection by using plasma, and is different from a conventional stealth method, and the plasma stealth technology can greatly reduce the radar scattering cross section of an aircraft without changing the appearance structure of the aircraft. A plasma cloud is formed on the surface of the aircraft by using a plasma generator, a generating sheet or a radioactive element, and by controlling characteristic parameters of plasma such as energy, ionization degree and oscillation frequency, a part of radar waves irradiated on the plasma cloud are absorbed, and a part of radar waves change the propagation direction. Therefore, the radar scattering cross section of the aircraft can be reduced, and the radar is difficult to detect by changing the frequency of the reflected signal so as to achieve the stealth purpose.
Research shows that the stealth characteristic of the plasma is far superior to that of other stealth methods, and as long as the plasma cladding parameters are proper, the plasma can absorb most of electromagnetic waves; electromagnetic waves which are not absorbed by the plasma can bypass the plasma or generate refraction to change the propagation direction, so that the electromagnetic energy returned to a radar receiver is very small, and the radar is difficult to find an aircraft hidden in the plasma cloud to realize stealth. Compared with other conventional stealth technologies, the plasma stealth technology has the following advantages:
(1) the wave-absorbing frequency band is wide, the absorptivity is high, and the stealth performance is good;
(2) not only can absorb microwave, but also can absorb infrared radiation;
(3) and a wave-absorbing material coating is not used, so that the maintenance cost is low.
In the prior art, two generations of stealth products exist: first generation: the thickness of the plasma generating sheet is 0.5-0.7mm, the voltage is several kilovolts, and the current is only a few milliamperes. The plasma sheet is placed at the strong radiation part of the aircraft, so that air can be ionized to generate plasma; and (4) second generation: the plasma generator is added with easily ionized gas to generate plasma. The quality of the product is not more than 100Kg, the power consumption is not more than several kilowatts, but the prior art is difficult to form a uniform plasma covering layer in a large area range on the surface of the equipment, so that plasma discharge can be realized only at partial positions at present, plasma uniform distribution on the surface of the equipment cannot be really realized, and the stealth effect is further influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
Therefore, the invention provides a method for realizing equipment stealth by using plasma jet.
In view of the above, the present invention provides a method for realizing equipment stealth by using plasma jet, which is characterized by comprising the following steps:
step 1: processing a plurality of micropores on the surface of the equipment;
step 2: disposing a plurality of electrodes inside and/or between the microwells; a positive electrode and a negative electrode are arranged around each micropore;
and step 3: starting the equipment to move, introducing high-pressure air through the micropore inlet, and enabling the high-pressure air to flow through an ionization space in the micropore;
and 4, step 4: the electrode is electrified, the electrode discharges to ionize the high-pressure air into plasma, and the plasma is ejected out of the micropore outlet in a jet flow mode.
Preferably, when equipped as an aircraft, the high pressure air is high pressure air compressed using the compressor of an aircraft engine.
Preferably, when equipped as a ship, the high pressure air is the high pressure air compressed by the compressor of the ship's turbine.
Compared with the prior art, the invention has the beneficial effects that: the plasma stealth device can form a uniform and continuous plasma layer on the surface of the device, further improves the stealth effect of the plasma, and has positive significance for promoting the development and the practicability of the plasma stealth technology in China.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 shows a schematic structural diagram of a microporous plasma jet according to one embodiment of the present invention;
FIG. 2 shows a schematic structural diagram of a microporous plasma jet according to yet another embodiment of the present invention
FIG. 3 shows a schematic structural diagram of a microporous plasma jet according to yet another embodiment of the present invention
FIG. 4 shows a schematic structural diagram of a microporous plasma jet according to yet another embodiment of the present invention
FIG. 5 shows a schematic diagram of a cross-sectional structure of a micro-well according to an embodiment of the present invention
FIG. 6 shows a schematic diagram of the structure of a microwell arrangement according to one embodiment of the present invention
Wherein: 1, micropores; 11 an inlet; 12 an outlet; 2, an electrode; 21 needle-like high voltage electrodes; 22 strip-shaped high-voltage electrodes; 23 strip-shaped low-voltage electrodes; 3 equipping the surface.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A method of using plasma jets to achieve equipment stealth according to some embodiments of the present invention is described below with reference to fig. 1-6.
In an embodiment of the present invention, as shown in fig. 1 to 6, the present invention provides a method for realizing equipment stealth by using plasma jet, comprising the steps of:
step 1: processing a plurality of micropores 1 on the surface 3 of the device;
and 2, step: a plurality of electrodes 2 are arranged inside the microwells 1 and/or between the microwells 1;
and step 3: starting the equipment to move, introducing high-pressure air through the inlet 11 of the micropore 1, and enabling the high-pressure air to flow through an ionization space in the micropore 1;
and 4, step 4: electrifying the electrode 2, ionizing the high-pressure air into plasma by the discharge of the electrode 2, and ejecting the plasma out of the outlet 12 of the micropore 1 in a jet flow mode;
in the embodiment, firstly, an electric spark or a micro drill is adopted to machine a plurality of micropores 1 on an equipment surface 3, the micropores 1 penetrate through the equipment surface in a cylindrical structure, the cross section can be in a circular shape, an oval shape or other shapes, the longitudinal section of the micropores 1 can be vertical to the longitudinal section of the equipment surface 3, the longitudinal section of the micropores 1 can also be inclined at a certain angle with the longitudinal section of the equipment surface 3, the micropores 1 are arranged on the equipment surface 3 in a dislocation arrangement, sequential arrangement, group arrangement, irregular arrangement and other manners, a plurality of electrodes 2 are arranged in the micropores 1 or between the micropores 1 and the micropores 1, then the equipment is started to move, high-pressure air flows through the micropores 1 on the equipment surface 3, the electrodes 2 are electrified, so that a positive electrode and a negative electrode are arranged around each micropore 1, an ionization space is formed in each micropore 1, and the electrodes 2 continuously discharge, high pressure air enters from the inlet 11 of the micropore 1, and the high pressure air flowing through the micropore 1 is ionized into plasma and then is emitted from the outlet 12 of the micropore 1. Because the equipment is in a high-speed running state at the moment, high-speed air which is opposite to the movement direction of the equipment flows on the surface 3 of the equipment, and the plasma jet is ejected in a direction which forms a certain included angle with the surface 3 of the equipment through the outlet 12 of the micropore 1 and then is mixed with the air which moves at a high speed along the surface 3 of the equipment; under the action of high-speed airflow, the plasma jet flows move along the equipment surface 3 instead, the plasma jet flow ejected from one micropore 1 can cover the equipment surface 3 with a certain area, the plasma jet flows among different micropores 1 are mutually superposed and matched, and finally continuous and uniform plasma covering is formed on the whole outer surface of the equipment, so that equipment stealth is realized.
In this embodiment, the arrangement of the electrodes in the micropores 1 and/or between the micropores may be implemented in various ways, for example, when the equipment surface 3 is made of a conductive material, a needle-shaped high voltage electrode 21 is disposed in the micropore 1, the ends of the needle-shaped high voltage electrodes 21 may be connected, and the needle-shaped high voltage electrodes 21 are powered simultaneously to form an ionization space in each micropore 1. When the equipment surface 3 is made of insulating materials, a plurality of strip-shaped high-voltage electrodes 22 and strip-shaped low-voltage electrodes 23 are arranged between the micropores 1, positive electrodes and negative electrodes are arranged around each micropore 1, the strip-shaped high-voltage electrodes 22 and the strip-shaped low-voltage electrodes 23 are electrified, an ionization space can be formed in each micropore 1, high-voltage air flowing through the micropores 1 is ionized into plasma, the shapes of the strip-shaped high-voltage electrodes 22 and the strip-shaped low-voltage electrodes 23 can be matched with gaps between the micropores 1 according to different arrangement modes of the micropores 1, for example, the high-voltage electrodes and the low-voltage electrodes are arranged in a linear shape and a wavy shape according to the gaps between the micropores 1, and other shapes can be set, so that positive electrodes and negative electrodes are arranged around each micropore 1, and the ionization space is formed in each micropore 1. When the surface 3 of the device is made of insulating material, a needle-shaped high-voltage electrode 21 can be arranged in each micropore 1, a strip-shaped low-voltage electrode 23 is arranged between the micropores 1, the needle-shaped high-voltage electrode 21 and the strip-shaped low-voltage electrode 23 are electrified, so that an ionization space is formed in each micropore 1, the shape of the strip-shaped low-voltage electrode 21 is matched with the gap between the micropores 1 according to different arrangement modes of the micropores 1, for example, the strip-shaped low-voltage electrode is arranged in a linear type, a wave type or the like, of course, the electrode 2 can be arranged in other forms, and the purpose is to ensure that after the electrode 2 is electrified, the periphery of each micropore 1 is provided with a positive electrode and a negative electrode, so that the ionization space is formed in each micropore 1.
In this embodiment, a housing may also be disposed outside the equipment surface 3, so that the equipment surface is a double-layer structure, a gap exists between the housing and the equipment surface 3, an electric spark or a micro drill is used to machine a plurality of micropores 1 on the housing, the micropores 1 penetrate the equipment surface in a cylindrical structure, the cross section of the micropores 1 may be in a circular, oval or other shape, the longitudinal section of the micropores 1 may be perpendicular to the longitudinal section of the equipment surface 3, the longitudinal section of the micropores 1 may also be inclined at a certain angle to the longitudinal section of the equipment surface 3, the micropores 1 are disposed on the housing in a staggered arrangement, sequential arrangement, group arrangement, irregular arrangement, etc., a plurality of electrodes 2 are disposed inside the micropores 1 or between the micropores 1 and the micropores 1, then the equipment is started to move, and high-pressure air is introduced into the gap between the housing and the equipment surface 3, and the high-pressure air flows through the micropores 1 on the housing, electrifying the electrode 2, enabling the periphery of each micropore 1 to be provided with a positive electrode and a negative electrode, forming an ionization space in each micropore 1, continuously discharging the electrode 2, enabling high-pressure air to enter from a micropore inlet 11, ionizing the high-pressure air flowing through the micropore 1 into plasma, then ejecting the plasma through a micropore outlet 12, starting equipment to move, enabling the equipment to drive at high speed, enabling the air to transversely flow through the shell at high speed, enabling the plasma jet to be ejected through the micropore 1 outlet 12 and then mixed with the air moving at high speed along the shell, enabling the plasma jet to move along the shell under the action of high-speed airflow, enabling the plasma jet ejected from one micropore 1 to cover the shell with a certain area, enabling the plasma jets among different micropores 1 to be mutually superposed and matched, and finally forming continuous and uniform plasma covering on the whole shell of the equipment to realize equipment stealth. When the shell is made of conductive material, needle-shaped high-voltage electrodes 21 can be arranged in the micropores 1, the end parts of the needle-shaped high-voltage electrodes 21 can be connected and are integrally designed, and the needle-shaped high-voltage electrodes 21 are electrified simultaneously, so that an ionization space is formed in each micropore 1. When the shell is made of insulating materials, a plurality of strip-shaped high-voltage electrodes 22 and strip-shaped low-voltage electrodes 23 can be arranged between the micropores 1, so that a positive electrode and a negative electrode are arranged around each micropore 1, the strip-shaped high-voltage electrodes 22 and the strip-shaped low-voltage electrodes 23 are electrified, so that an ionization space is formed in each micropore 1, the shapes of the strip-shaped high-voltage electrodes 22 and the strip-shaped low-voltage electrodes 23 are matched with the gaps between the micropores 1 according to different arrangement modes of the micropores 1, for example, the high-voltage electrodes and the low-voltage electrodes are arranged in a linear shape or a wavy shape according to the gaps between the micropores 1; when the surface 3 of the device is made of insulating material, a needle-shaped high-voltage electrode 21 can be arranged in each micropore 1, a strip-shaped low-voltage electrode 23 is arranged between the micropores 1, the needle-shaped high-voltage electrode 21 and the strip-shaped low-voltage electrode 23 are electrified, so that an ionization space is formed in each micropore 1, the shape of the strip-shaped low-voltage electrode 21 is matched with the gap between the micropores 1 according to different arrangement modes of the micropores 1, for example, the strip-shaped low-voltage electrode is arranged in a linear type, a wave type or the like, of course, the electrode 2 can be arranged in other forms, and the purpose is to ensure that after the electrode 2 is electrified, the periphery of each micropore 1 is provided with a positive electrode and a negative electrode, so that the ionization space is formed in each micropore 1.
In one embodiment of the invention, preferably, when equipped as an aircraft, the high pressure air is high pressure air compressed using a compressor of an aircraft engine.
In the embodiment, because the space of the airplane is limited, high-pressure air compressed by a compressor of an aeroengine of the airplane is adopted, a plurality of air guide holes are formed in a casing at the last stage or the middle stage of the compressor of the aeroengine, and air guide pipelines are arranged at the outlets of the holes and connected with the ionization space so that the high-pressure air is conveyed to the ionization space along the air guide pipelines.
In one embodiment of the invention, preferably, when equipped as a ship, the high pressure air is high pressure air compressed by a compressor of a ship turbine.
In the embodiment, when the device is a ship, high-pressure air compressed by a compressor of the ship turbine is adopted, a plurality of air guide holes are formed in a casing at the last stage or the middle stage of the compressor of the ship turbine, air guide pipelines are arranged at the outlets of the holes and connected with an ionization space, so that the high-pressure air is conveyed to the ionization space along the air guide pipelines, and an independent compressor can be adopted and placed on a deck; a high-pressure gas tank can also be adopted, a gas guide pipeline is arranged at the outlet of the high-pressure gas tank, the other end of the gas guide pipeline is connected with the ionization space, and high-pressure gas is guided to the microporous structure on the surface of the equipment through the gas guide pipeline.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be used in any one or more embodiments or examples.
Claims (3)
1. A method for realizing equipment stealth by using plasma jet is characterized by comprising the following steps:
step 1: processing a plurality of micropores on the surface of the equipment;
machining a plurality of micropores on the surface of the equipment by adopting electric sparks or a micro drill, wherein the micropores penetrate the surface of the equipment in a cylindrical structure, the cross section of each micropore is circular or oval, the longitudinal section of each micropore is vertical to the longitudinal section of the surface of the equipment or inclined at a certain angle with the longitudinal section of the surface of the equipment, and the micropores are arranged on the surface of the equipment in a dislocation arrangement mode, a sequential arrangement mode, a group arrangement mode or an irregular arrangement mode;
and 2, step: arranging a plurality of electrodes inside the micropores and/or among the micropores to ensure that the periphery of each micropore is provided with a positive electrode and a negative electrode;
and step 3: starting the equipment to move, and introducing high-pressure air through the micropore inlet to enable the high-pressure air to flow through an ionization space in the micropore;
and 4, step 4: electrifying the electrode, ionizing the high-pressure air into plasma by electrode discharge, and ejecting the plasma out of the micropore outlet in a jet flow mode;
electrifying the electrodes to enable the periphery of each micropore to be provided with a positive electrode and a negative electrode, forming an ionization space in each micropore, continuously discharging the electrodes, enabling high-pressure air to enter from the micropore inlet, ionizing the high-pressure air flowing through the micropore into plasma, and then ejecting the plasma from the micropore outlet; because the equipment is in a high-speed running state at the moment, high-speed air which is opposite to the movement direction of the equipment flows through the surface of the equipment, and the plasma jet flow is jetted in a direction which forms a certain included angle with the surface of the equipment through the micropore outlet and then is mixed with the air which moves at a high speed along the surface of the equipment; under the action of high-speed airflow, the plasma jet flows move along the surface of the equipment instead, the plasma jet flow ejected by one micropore can cover the surface of the equipment with a certain area, the plasma jet flows among different micropores are mutually superposed and matched, and finally continuous and uniform plasma covering is formed on the whole outer surface of the equipment, so that equipment stealth is realized;
when the surface of the device is made of conductive materials, needle-shaped high-voltage electrodes are arranged in the micropores, the end parts of the needle-shaped high-voltage electrodes can be connected and are integrally designed, and the needle-shaped high-voltage electrodes are electrified simultaneously, so that an ionization space is formed in each micropore; when the surface of the device is made of insulating materials, a plurality of strip-shaped high-voltage electrodes and strip-shaped low-voltage electrodes are arranged among the micropores, so that a positive electrode and a negative electrode are arranged around each micropore, the strip-shaped high-voltage electrodes and the strip-shaped low-voltage electrodes are electrified, and an ionization space is formed in each micropore.
2. The method of stealth of equipment using plasma jet according to claim 1, characterized in that when the equipment is an aircraft, the high-pressure air is compressed using a compressor of an aircraft engine.
3. The method for realizing equipment stealth by using plasma jet according to claim 1, wherein when the equipment is a ship, the high-pressure air is high-pressure air compressed by a compressor of a ship turbine.
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| GB2453886B (en) * | 2006-07-26 | 2011-08-17 | Univ Illinois | Buried circumferential electrode microcavity plasma device arrays, electrical interconnects, and formation method |
| US8890409B2 (en) * | 2008-05-14 | 2014-11-18 | The Board Of Trustees Of The University Of Illnois | Microcavity and microchannel plasma device arrays in a single, unitary sheet |
| US8957572B2 (en) * | 2011-06-24 | 2015-02-17 | The Board Of Trustees Of The University Of Illinois | Microplasma jet devices, arrays, medical devices and methods |
| CN104302085A (en) * | 2014-10-14 | 2015-01-21 | 西北工业大学 | Non air contact type plasma bipolar exciting electrode and plasma exciter |
| CN108016622B (en) * | 2017-11-25 | 2019-11-08 | 中国商用飞机有限责任公司 | A kind of active aircraft anti-icing method and device |
| CN107972891A (en) * | 2017-11-28 | 2018-05-01 | 北京航空航天大学 | A kind of Spacecraft Attitude Control and realization device using plasma flow control technology |
| CN108811289A (en) * | 2018-06-12 | 2018-11-13 | 厦门大学 | A kind of dynamic pressure type plasma synthesis fluidic generator |
| CN109250074A (en) * | 2018-09-30 | 2019-01-22 | 中国人民解放军国防科技大学 | Hypersonic aircraft drag reduction method based on shock wave weakening of leading edge of synthetic jet wing |
| CN110809356B (en) * | 2019-10-23 | 2021-01-15 | 南京航空航天大学 | Plasma terahertz waveguide generation device |
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