CN104185354A - Dielectric barrier discharge plasma exciter and system - Google Patents
Dielectric barrier discharge plasma exciter and system Download PDFInfo
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- CN104185354A CN104185354A CN201410142387.4A CN201410142387A CN104185354A CN 104185354 A CN104185354 A CN 104185354A CN 201410142387 A CN201410142387 A CN 201410142387A CN 104185354 A CN104185354 A CN 104185354A
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Abstract
The invention discloses a dielectric barrier discharge plasma exciter and system, belongs to the field of a plasma exciter and is designed to solve the problem of low wall jet speed of a conventional device. The dielectric barrier discharge plasma exciter at least comprises a medium body, a first electrode arranged on the surface of the medium body, and a second electrode and a third electrode which are arranged in the medium body, wherein the first electrode, the second electrode and the third electrode are parallel mutually; high-density plasma can be produced between the first electrode and the second electrode; and the third electrode is used for improving the wall jet speed. The dielectric barrier discharge plasma exciter system comprises at least two groups of same exciters above. The dielectric barrier discharge plasma exciter and system can carry out independent control and organic unification on production and pneumatic excitation of plasma, so that the flow control performance of the plasma exciter is improved; and the dielectric barrier discharge plasma exciter and system are wide in application range, and are especially suitable for the field of flow control of the a wing/an engine.
Description
Technical field
The dielectric barrier discharge plasma exciter system that the present invention relates to a kind of dielectric barrier discharge plasma exciter and formed by least two these identical exciters.
Background technology
Dielectric barrier discharge plasma exciter is a kind of active fluid control technology of forward position, can effectively promote the aerodynamic characteristic of wing and power set, reaches the object of lift-rising/drag reduction.
The primary structure of the elementary cell of existing dielectric barrier discharge plasma exciter is bipolar electrode unistage type dielectric barrier discharge structure.Concrete, comprising the two strip metal electrodes that are arranged in parallel, a strip electrode is embedded in the good dielectric inside of insulation property, this electrode grounding; Another strip electrode is arranged in insulating material surface, exposed among ambient air, by this electrode input AC high pressure.Atmospherical discharges between two strip electrodes, produces low temperature plasma on dielectric surface.
The speed of the wall jet that this bipolar electrode unistage type dielectric barrier discharge plasma exciter produces is lower, is difficult to be applied to the mobile control of wing.Although raising input voltage can promote the speed of wall jet, too high input voltage can affect performance and the life-span of dielectric, even destroys exciter.
Summary of the invention
The above-mentioned technical problem existing based on background technology, the present invention proposes a kind of dielectric barrier discharge plasma exciter, and this exciter can effectively promote wall jet speed, promote exciter performance and life-span.Concrete scheme is as follows:
A kind of dielectric barrier discharge plasma exciter, described exciter at least comprises dielectric, is arranged on first electrode on described dielectric surface and is arranged on the second electrode and the third electrode of described dielectric inside; Described the first electrode, the second electrode and third electrode are parallel to each other; Spacing between the first electrode and the second electrode is the first spacing d1, and the spacing between the second electrode and third electrode is the second spacing d2; Between described the first electrode and described the second electrode, can produce high-density plasma, described third electrode is used for promoting wall jet speed.
Particularly, described spacing d1 is less than described spacing d2.
Particularly, the width w3 of third electrode described in the width w2 < of the width w1 of described the first electrode≤described the second electrode.
Particularly, described dielectric is insulating material; The first electrode, the second electrode and third electrode are made of metal.
Particularly, described the first electrode and described third electrode are connected to same alternating-current voltage source; Described the second electrode grounding.
Particularly, described the first electrode is connected to the first alternating-current voltage source, and described third electrode is connected to the second alternating-current voltage source, and described the first alternating-current voltage source is identical with described the second alternating voltage source frequency, single spin-echo; Described the second electrode grounding.
Particularly, described the first electrode is connected to the first alternating-current voltage source, and described third electrode is connected to the second alternating-current voltage source, and the frequency of described the first alternating-current voltage source is higher than the frequency of described the second alternating-current voltage source, described the second electrode grounding.
On the other hand, the present invention is by the following technical solutions:
A kind of dielectric barrier discharge plasma exciter system, described system comprises the above-mentioned exciter that at least two groups are identical.
Dielectric barrier discharge plasma exciter of the present invention is provided with three strip electrodes in parallel to each other in surface and the inside of dielectric, form three electrode two-part structures, plasma produces and air-operated drive had not only carried out independently controlling but also organic unity, has promoted the mobile control performance of Plasma Actuator.Optimize the control parameter of exciter, obtained higher wall jet speed, improved air-operated drive effect, the control of more effectively flowing.Applied widely, be particularly useful for the mobile control field of wing/engine.
Dielectric barrier discharge plasma exciter system of the present invention comprises the above-mentioned exciter that at least two groups are identical, can induce higher wall jet speed, and obtaining better flows controls effect.
Brief description of the drawings
Fig. 1 is the structural representation of the dielectric barrier discharge plasma exciter that provides of preferred embodiment one.
In figure, be labeled as:
1, dielectric; 2, plasma; 11, the first electrode; 12, the second electrode; 13, third electrode.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Preferred embodiment one:
This preferred embodiment provides a kind of dielectric barrier discharge plasma exciter.As shown in Figure 1, exciter at least comprises the dielectric 1 be made up of insulating material, is arranged on first electrode 11 on dielectric 1 surface and is arranged on the second electrode 12 and the third electrode 13 of dielectric 1 inside.The first electrode 11, the second electrode 12 and third electrode 13 are parallel to each other.Under the high-frequency and high-voltage alternating current effect between the first electrode 11 and the second electrode 12, gas discharge produces high-density plasma, under the strong tangential electric field action that ion in plasma forms at third electrode 13, obtain tangential velocity, ion passes to gas molecule by collision by energy, thereby promotes wall jet speed.Above-specified high density plasma is preferably density higher than 1012cm-3.
Wherein, the first electrode 11 and the second electrode 12 form first paragraph, and the second electrode 12 and third electrode 13 form second segment, totally form three electrode two-part dielectric barrier discharge plasma exciters, have promoted the mobile control performance of Plasma Actuator.
In order effectively to produce plasma 2, in the first paragraph of exciter, the spacing d1 value between the first electrode 11 and the second electrode 12 is less, spacing d1=0-2mm, preferably 0.5mm, 1mm and 1.2mm.For improve exciter air-operated drive effect, can bear high voltage amplitude and obtain larger tangential electric field strength, in the second segment of exciter, spacing d2 between the second electrode 12 and third electrode 13 is greater than spacing d1, spacing d2=5-8mm, preferably 5.5mm, 6mm, 6.5mm, 7mm and 7.5mm.
The width w3 of the width w2 < third electrode 13 of width w1≤the second electrode 12 of the first electrode 11; Width w1=1-5mm, width w2=1-5mm, width w3=5-10mm.
The material of dielectric 1 preferably uses high voltage bearing insulating material, more preferably polyimides (Polyimide PI), and it has the less (ε of relative dielectric constant
r=3.4), the advantage such as anti-disruptive field intensity high (276kV/mm), high temperature resistant (300 DEG C).Because the anti-disruptive field intensity of polyimides is very high, the dielectric thickness h ε covering on the second electrode 12 and third electrode 13 can be less, h
ε=0.1-0.3mm, preferably 0.2mm.
The first electrode 11, the second electrode 12 and third electrode 13 are made of copper.But the material of electrode is not limited to copper, other material that can meet the conditions such as electric conductivity is good, secondary electron yield is high, heat conductivity is good, cost is low also can.
Length L=the 10-200cm of the first electrode 11, the second electrode 12 and third electrode 13; The thickness h of the first electrode 11, the second electrode 12 and third electrode 13
e=0.01-0.3mm.
Power configuration mode: adopt single supply configuration mode, the AC high voltage that power supply output polarity is positive-negative polarity, the first electrode 11 and third electrode 13 are connected to this alternating-current voltage source; The second electrode 12 ground connection.Now at the first paragraph of exciter and the second segment ac high-voltage of identical, the single spin-echo of forming frequency respectively.
The exciter structure of this power configuration mode is simple, efficiency is high.Synchronously anti-phase because of two sections of voltages of exciter, thereby can synchronously obtaining momentum from the tangential electric field of second segment, the electric charge producing in first paragraph produces air-operated drive, improve Energy Coupling efficiency.
Preferred embodiment two:
This preferred embodiment provides a kind of dielectric barrier discharge plasma exciter, and its structure and preferred embodiment one are basic identical.Exciter at least comprises the dielectric be made up of insulating material, is arranged on first electrode on dielectric surface and is arranged on the second electrode and the third electrode of dielectric inside.The first electrode, the second electrode and third electrode are parallel to each other.Wherein, the first electrode and the second electrode form first paragraph, and the second electrode and third electrode form second segment.
Difference is: the configuration mode of power supply is same frequency antiphase duplicate supply.The first electrode is connected to the first alternating-current voltage source, and third electrode is connected to the second alternating-current voltage source, and the first alternating-current voltage source is identical with the second alternating voltage source frequency, single spin-echo; The second electrode grounding.
The exciter efficiency of this power configuration mode is high, can control independently the input voltage amplitude of two sections of exciters.The input voltage amplitude that improves second segment, can obtain better air-operated drive effect.
Preferred embodiment three:
This preferred embodiment provides a kind of dielectric barrier discharge plasma exciter, and its structure and preferred embodiment one are basic identical.Exciter at least comprises the dielectric be made up of insulating material, is arranged on first electrode on dielectric surface and is arranged on the second electrode and the third electrode of dielectric inside.The first electrode, the second electrode and third electrode are parallel to each other.Wherein, the first electrode and the second electrode form first paragraph, and the second electrode and third electrode form second segment.
Difference is: the configuration mode of power supply is duplicate supply bifrequency.The first electrode is connected to the first alternating-current voltage source of high frequency, and third electrode is connected to second alternating-current voltage source of frequency lower than the first alternating-current voltage source, the second electrode grounding.The calibration value of the first alternating-current voltage source is 10-50kHz; The calibration value of the second alternating-current voltage source is 1-10kHz.
Two sections of supply frequencies of exciter of this power configuration mode and voltage can independent regulation, ensure that exciter obtains optimum air-operated drive effect.Because the frequency of first paragraph is higher, the plasma averag density of generation is higher, can provide more charged particle to participate in air-operated drive process.
Preferred embodiment four:
This preferred embodiment provides a kind of dielectric barrier discharge plasma exciter system, and this system comprises the exciter as described in identical as arbitrary in preferred embodiment one to three of at least two groups.Can induce higher wall jet speed, obtaining better flows controls effect.
Claims (8)
1. a dielectric barrier discharge plasma exciter, it is characterized in that, described exciter at least comprises dielectric (1), is arranged on first electrode (11) on described dielectric (1) surface and is arranged on the second electrode (12) and the third electrode (13) of described dielectric inside; Described the first electrode (11), the second electrode (12) and third electrode (13) are parallel to each other; Spacing between the first electrode (11) and the second electrode (12) is the first spacing d1, and the spacing between the second electrode (12) and third electrode (13) is the second spacing d2; Between described the first electrode (11) and described the second electrode (12), can produce high-density plasma, described third electrode (13) is for promoting wall jet speed.
2. dielectric barrier discharge plasma exciter according to claim 1, is characterized in that, described the first spacing d1 is less than described the second spacing d2.
3. dielectric barrier discharge plasma exciter according to claim 1, is characterized in that, the width w3 of third electrode (13) described in the width w2 < of width w1≤described second electrode (12) of described the first electrode (11).
4. dielectric barrier discharge plasma exciter according to claim 1, is characterized in that, described dielectric (1) is insulating material; Described the first electrode (11), the second electrode (12) and third electrode (13) are made of metal.
5. according to the arbitrary described dielectric barrier discharge plasma exciter of claim 1 to 4, it is characterized in that, described the first electrode (11) and described third electrode (13) are connected to same alternating-current voltage source; Described the second electrode (12) ground connection.
6. according to the arbitrary described dielectric barrier discharge plasma exciter of claim 1 to 4, it is characterized in that, described the first electrode (11) is connected to the first alternating-current voltage source, described third electrode (13) is connected to the second alternating-current voltage source, and described the first alternating-current voltage source is identical with described the second alternating voltage source frequency, single spin-echo; Described the second electrode (12) ground connection.
7. according to the arbitrary described dielectric barrier discharge plasma exciter of claim 1 to 4, it is characterized in that, described the first electrode (11) is connected to the first alternating-current voltage source, described third electrode (13) is connected to the second alternating-current voltage source, the frequency of described the first alternating-current voltage source is higher than the frequency of described the second alternating-current voltage source, described the second electrode (12) ground connection.
8. a dielectric barrier discharge plasma exciter system, is characterized in that, described system comprises the exciter as described in identical as arbitrary in claim 1 to 7 of at least two groups.
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| CN108243549A (en) * | 2018-03-15 | 2018-07-03 | 哈尔滨工业大学 | Plasma Actuator with fluting ventilation device |
| CN108551715A (en) * | 2018-04-23 | 2018-09-18 | 中国民航大学 | Dielectric barrier discharge plasma air accelerates flow tube |
| CN108718477A (en) * | 2018-07-13 | 2018-10-30 | 大连理工大学 | Three electrode pulses of one kind are along the anti-broken icing device of face corona plasma |
| CN110225639A (en) * | 2019-05-24 | 2019-09-10 | 中国人民解放军空军工程大学 | A kind of device and method improving surface DBD driver induced jet velocity |
| WO2020247031A1 (en) | 2019-06-07 | 2020-12-10 | Massachusetts Institute Of Technology | Electroaerodynamic devices |
| CN117354410A (en) * | 2023-12-05 | 2024-01-05 | 荣耀终端有限公司 | Exciter and electronic equipment |
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Cited By (11)
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| CN108243549A (en) * | 2018-03-15 | 2018-07-03 | 哈尔滨工业大学 | Plasma Actuator with fluting ventilation device |
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| CN108551715A (en) * | 2018-04-23 | 2018-09-18 | 中国民航大学 | Dielectric barrier discharge plasma air accelerates flow tube |
| CN108718477A (en) * | 2018-07-13 | 2018-10-30 | 大连理工大学 | Three electrode pulses of one kind are along the anti-broken icing device of face corona plasma |
| CN108718477B (en) * | 2018-07-13 | 2024-04-12 | 大连理工大学 | Three-electrode pulse surface-flow light discharge plasma anti-breaking icing device |
| CN110225639A (en) * | 2019-05-24 | 2019-09-10 | 中国人民解放军空军工程大学 | A kind of device and method improving surface DBD driver induced jet velocity |
| WO2020247031A1 (en) | 2019-06-07 | 2020-12-10 | Massachusetts Institute Of Technology | Electroaerodynamic devices |
| EP3980332A4 (en) * | 2019-06-07 | 2023-06-14 | Massachusetts Institute of Technology | Electroaerodynamic devices |
| US11725638B2 (en) | 2019-06-07 | 2023-08-15 | Massachusetts Institute Of Technology | Electroaerodynamic devices |
| CN117354410A (en) * | 2023-12-05 | 2024-01-05 | 荣耀终端有限公司 | Exciter and electronic equipment |
| CN117354410B (en) * | 2023-12-05 | 2024-04-19 | 荣耀终端有限公司 | Exciter and electronic equipment |
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