CN102595758A - Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method - Google Patents
Dielectric barrier discharge (DBD) plasma trailing edge jetting device and method Download PDFInfo
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- CN102595758A CN102595758A CN2011100054031A CN201110005403A CN102595758A CN 102595758 A CN102595758 A CN 102595758A CN 2011100054031 A CN2011100054031 A CN 2011100054031A CN 201110005403 A CN201110005403 A CN 201110005403A CN 102595758 A CN102595758 A CN 102595758A
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Abstract
The invention discloses a dielectric barrier discharge (DBD) plasma trailing edge jetting device and method, relating to a flow control technology. The device comprises a plurality of groups of plasma exciters, insulating media and a high-voltage power supply and is used for improving the flowing at a wake area for the flow around a cylinder, wherein the plasma excitation of certain strength is applied to a proper position at a leeward of the cylinder, the movement of low-velocity flowing bodies in a boundary layer is accelerated to form jet flows on a wake space at the trailing edge of the cylinder, so that a wake low-velocity area can be flattened to further achieve the effects of improving a flow field at the wake area and reducing wake losses pneumatic noises, and the device can be applied to resistance reduction and noise reduction for an aircraft landing gear. The DBD plasma trailing edge jetting device disclosed by the invention has the advantages of simple and compact structure, high reaction speed, low energy consumption and the like.
Description
Technical field
The present invention relates to the flow control technique field, is a kind of dielectric barrier discharge plasma trailing edge fluidic device and method, can improve the peripheral flow wake and flow, and is mainly used in the aviation industry.
Background technology
Along with scientific and technological progress and growth in the living standard, air transportation is because of its convenient favor that more and more receives people.As the Landing Gear System of one of aircraft critical component, its service behaviour directly has influence on and takes off, landing data and flight safety, and Landing Gear System plays crucial effects in aircraft components.Undercarriage can bring bigger resistance and aerodynamic noise; Particularly aerodynamic drag is made negative work in process gear down, if aircraft flight speed is very big, when promptly very big the or crosswind speed of incoming flow relative velocity is very big; The hydraulic coupling that hydraulic actuator provided does not reach desired load; Then undercarriage may not put down at the appointed time and put in place, perhaps fails to lay down at all, and this is extremely dangerous situation.In each workpiece of undercarriage, the probability that jack in use lost efficacy is than higher in modern times.
Summary of the invention
The purpose of this invention is to provide a kind of dielectric barrier discharge plasma trailing edge fluidic device and method, help to reduce the flow losses and the aerodynamic noise of peripheral flow, make undercarriage drag reduction and noise reduction.
In order to achieve the above object, technical solution of the present invention is:
A kind of method of dielectric barrier discharge plasma trailing edge jet, it comprises step:
A) on cylinder, arrange many group plasma excitation devices;
B) cylinder is placed in undercarriage wheel support upright top cylindrical;
C) after exciter is connected high-tension electricity, near air ionization is produced plasma;
D) plasma that is produced quickens the motion of low velocity gas in the boundary-layer, adds the wake that flat cylinder streams, and then reaches the effect that reduces the tail loss, reduces aerodynamic noise.
Described method, its said boundary-layer is the contact layer of gas and cylinder outer surface.
The dielectric barrier discharge plasma trailing edge fluidic device that a kind of described method is used, it comprises three parts: cylinder, organize plasma excitation device and high voltage source more; Wherein, cylinder is made with insulating material, is the carrier of arranging the plasma excitation device; Every group of plasma excitation device comprises two kinds of electrodes; Two kinds of electrode interlaced arrangement are in the cylinder both sides; A kind of electrode connects the high-pressure side of high voltage source; Another kind of electrode connects the earth terminal of high-field electrode, connects behind the high-tension electricity with near the air ionization plasma excitation device near air movement quickening and form jet.
Described trailing edge fluidic device, its said two kinds of electrodes, wherein a kind of is bare electrode, for a plurality of, the high-pressure side of jointed high voltage power supply, another kind is a buried electrodes, connects the earth terminal of high-field electrode; At least two bare electrodes split buried electrodes both sides.
Described trailing edge fluidic device, its said two kinds of electrodes are rectangular bar shaped, along Cylindorical rod to setting, with metal material: tungsten, molybdenum, steel or high-temperature alloy are made; Two kinds of metal electrode width are 1-20mm.
Described trailing edge fluidic device, its said two kinds of electrodes, every pair comprises two bare electrodes, a buried electrodes, its logarithm is that 1-100 is right, confirms the electrode number that uses according to the size of cylinder.
Described trailing edge fluidic device; Its said interlaced arrangement is that two bare electrodes are positioned at cylinder outer surface in the cylinder both sides, and a buried electrodes is positioned at cylinder inner surface; Every pair plasma electrode interlaced arrangement; Along week circle order be: the spacing in a bare electrode, a buried electrodes, the bare electrode again, the every pair of metal electrode between buried electrodes and the bare electrode is 0-5mm, and buried electrodes is insulated material and covers.
Described trailing edge fluidic device, its said two kinds of electrodes along Cylindorical rod to setting, make plasma-induced mobile formation jet direction with come flow path direction identical.
Described trailing edge fluidic device, its said insulating material is polytetrafluoroethylene or high-temperature insulation pottery, high-temperature insulation quartz glass; The insulating material overburden cover of buried electrodes is 0.1-20mm.
Adopt system of the present invention can improve peripheral flow wake flow field, reduce the flow losses and the aerodynamic noise of peripheral flow.
The present invention is reducing with the technology of moving now very big difference is arranged aspect peripheral flow loss and the aerodynamic noise: plasma flow control is a kind of new ideas flow control technique based on the plasma air-operated drive; Plasma excitation is carrier with the plasma, and stream field applies a kind of controlled disturbance.
Several innovative point of the present invention is embodied in:
1) plasma excitation is an electric excitation, does not have moving component;
2) simple in structure, low in energy consumption, excitation parameters is regulated easily;
3) incentive action bandwidth and, response are rapidly;
Can not bring negative influence when 4) not using.
Description of drawings
Fig. 1 a is a dielectric barrier discharge plasma trailing edge fluidic device sketch map of the present invention;
Fig. 1 b is that plasma excitation device of the present invention is arranged sketch map;
Fig. 2 is the measured zone of PIV experiment of the present invention;
Fig. 3 a-3b is a plasma trailing edge fluidic device PIV experimental result picture of the present invention; Wherein:
Fig. 3 a is the motion pattern that does not apply plasma excitation;
Fig. 3 b applies the motion pattern of 19kV plasma excitation;
Fig. 4 is the sketch map that plasma excitation device of the present invention is arranged on undercarriage.
Description of reference numerals:
Embodiment
The method of a kind of dielectric barrier discharge plasma trailing edge jet of the present invention comprises step:
A) on cylinder, arrange many group plasma excitation devices;
B) cylinder is placed in undercarriage wheel support upright top cylindrical;
C) after exciter is connected high-tension electricity, near air ionization is produced plasma;
D) plasma that is produced quickens the motion of low velocity gas in the boundary-layer, adds the wake that flat cylinder streams, and then reaches the effect that reduces the tail loss, reduces aerodynamic noise.
Boundary-layer is the contact layer of gas and cylinder outer surface.
A kind of dielectric barrier discharge plasma trailing edge fluidic device comprises three parts: cylinder, organize plasma excitation device and high voltage source more; Wherein, cylinder is made with insulating material, is the carrier of arranging the plasma excitation device; Every group of plasma excitation device comprises two kinds of electrodes, two kinds of electrodes, and a kind of is bare electrode, is two, the high-pressure side of jointed high voltage power supply, another kind is a buried electrodes, connects the earth terminal of high-field electrode; Two bare electrodes split buried electrodes both sides, constitute a pair of.Its logarithm is that 1-100 is right, confirms the electrode number that uses according to the size of cylinder.
Two kinds of electrodes are rectangular bar shaped, along Cylindorical rod to setting, make plasma-induced mobile formation jet direction with come flow path direction identical, with metal material: tungsten, molybdenum, steel or high-temperature alloy making; Two kinds of metal electrode width are 1-20mm.
Two kinds of electrode interlaced arrangement are in the cylinder both sides; Be that two bare electrodes are positioned at cylinder outer surface; One buried electrodes is positioned at cylinder inner surface, and every pair plasma electrode interlaced arrangement along week circle order is: a bare electrode, a buried electrodes, a bare electrode again; Spacing in the every pair of metal electrode between buried electrodes and the bare electrode is 0-5mm, and buried electrodes is insulated material and covers.Two kinds of electrodes are connected behind the high-tension electricities near the air ionization plasma excitation device, near air movement quickening and form jet.
Insulating material adopts polytetrafluoroethylene or high-temperature insulation pottery, high-temperature insulation quartz glass; The insulating material overburden cover of buried electrodes is 0.1-20mm.
According to Fig. 1 to Fig. 3 a-b, provide better embodiment of the present invention, and describe in detail below, enable to understand better function of the present invention, characteristics.
Fig. 1 is a dielectric barrier discharge plasma trailing edge fluidic device sketch map of the present invention, and wherein Fig. 1 a has shown high voltage source 4, cylinder 1, bare electrode 2a, 2b and buried electrodes 3, and Fig. 1 b has provided the arrangement of plasma excitation device on cylinder.The be laid in electrode of cylinder both sides, the electrode of a side links to each other with the high-pressure side of power supply, the electrode of opposite side links to each other with the earth terminal of power supply.
Fig. 2 is the measured zone of PIV experiment.
Fig. 3 a-b is reaction plasma trailing edge fluidic device improvement the adding of the present invention experiment picture in horizontal tail mark flow field.This picture group sheet utilizes particle image velocimeter (PIV) to obtain.Fig. 3 a is the streamline when not applying plasma excitation; Fig. 3 b is the streamline when applying the 19kV plasma excitation.Visible by this picture group sheet; After applying plasma excitation; Can see the jet that plasma inducing is derived in wake; This jet adds the slough of having equalled wake, shows thus that plasma trailing edge fluidic device of the present invention has played to improve the effect that wake flows, and can play the effect that reduces flow losses and aerodynamic noise.
Fig. 4 is the sketch map that plasma excitation device of the present invention is arranged on undercarriage.Be arranged near the lee face trailing edge of aircraft takeoffs and landings post setting by figure visible plasma exciter.
Above-described, be merely preferred embodiment of the present invention, be not in order to limit scope of the present invention.Be that every simple, equivalence of doing according to the claims and the description of application of the present invention changes and modification, all fall into claim protection range of the present invention.
Claims (9)
1. the method for a dielectric barrier discharge plasma trailing edge jet is characterized in that, comprises step:
A) on cylinder, arrange many group plasma excitation devices;
B) cylinder is placed in undercarriage wheel support upright top cylindrical;
C) after exciter is connected high-tension electricity, near air ionization is produced plasma;
D) plasma that is produced quickens the motion of low velocity gas in the boundary-layer, adds the wake that flat cylinder streams, and then reaches the effect that reduces the tail loss, reduces aerodynamic noise.
2. the method for claim 1 is characterized in that, said boundary-layer is the contact layer of gas and cylinder outer surface.
3. the dielectric barrier discharge plasma trailing edge fluidic device that uses of the method for claim 1 is characterized in that, comprises three parts: cylinder, organize plasma excitation device and high voltage source more; Wherein, cylinder is made with insulating material, is the carrier of arranging the plasma excitation device; Every group of plasma excitation device comprises two kinds of electrodes; Two kinds of electrode interlaced arrangement are in the cylinder both sides; A kind of electrode connects the high-pressure side of high voltage source; Another kind of electrode connects the earth terminal of high-field electrode, connects behind the high-tension electricity with near the air ionization plasma excitation device near air movement quickening and form jet.
4. trailing edge fluidic device as claimed in claim 3 is characterized in that, said two kinds of electrodes, and wherein a kind of is bare electrode, for a plurality of, the high-pressure side of jointed high voltage power supply, another kind is a buried electrodes, connects the earth terminal of high-field electrode; At least two bare electrodes split buried electrodes both sides.
5. trailing edge fluidic device as claimed in claim 3 is characterized in that, said two kinds of electrodes are rectangular bar shaped, along Cylindorical rod to setting, with metal material: tungsten, molybdenum, steel or high-temperature alloy are made; Two kinds of metal electrode width are 1-20mm.
6. like claim 3 or 4 described trailing edge fluidic devices, it is characterized in that, said two kinds of electrodes, every pair comprises two bare electrodes, a buried electrodes, its logarithm is that 1-100 is right, confirms the electrode number that uses according to the size of cylinder.
7. like claim 3 or 4 described trailing edge fluidic devices, it is characterized in that said interlaced arrangement is in the cylinder both sides; Be that two bare electrodes are positioned at cylinder outer surface; One buried electrodes is positioned at cylinder inner surface, and every pair plasma electrode interlaced arrangement along week circle order is: a bare electrode, a buried electrodes, a bare electrode again; Spacing in the every pair of metal electrode between buried electrodes and the bare electrode is 0-5mm, and buried electrodes is insulated material and covers.
8. like claim 3 or 5 described trailing edge fluidic devices, it is characterized in that, said two kinds of electrodes along Cylindorical rod to setting, make plasma-induced mobile formation jet direction with come flow path direction identical.
9. like claim 3 or 7 described trailing edge fluidic devices, it is characterized in that said insulating material is polytetrafluoroethylene or high-temperature insulation pottery, high-temperature insulation quartz glass; The insulating material overburden cover of buried electrodes is 0.1-20mm.
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Cited By (13)
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| CN102913399A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for reducing the wake loss of a wind turbine |
| CN102913386A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for suppressing flow separation of suction surface of wind turbine blade |
| CN103835888A (en) * | 2012-11-20 | 2014-06-04 | 中国科学院工程热物理研究所 | Device and system for wind turbine braking |
| CN104875894A (en) * | 2015-05-27 | 2015-09-02 | 西北工业大学 | Dielectric barrier discharge plasma anti-icing device and method |
| CN104890881A (en) * | 2015-05-27 | 2015-09-09 | 西北工业大学 | Icing removing device and method of dielectric barrier discharge plasma |
| CN105101603A (en) * | 2015-08-04 | 2015-11-25 | 昆山禾信质谱技术有限公司 | Dielectric barrier discharge plasma gas jet apparatus |
| CN106686874A (en) * | 2017-03-30 | 2017-05-17 | 苏州普拉斯玛精密科技有限公司 | Plasma dielectric barrier discharging circuit |
| CN107484320A (en) * | 2017-07-20 | 2017-12-15 | 中国科学院工程热物理研究所 | Plasma nozzle |
| CN107734824A (en) * | 2017-09-08 | 2018-02-23 | 浙江大学 | Dielectric barrier discharge plasma flat board turbulent flow drag reduction device |
| CN108551715A (en) * | 2018-04-23 | 2018-09-18 | 中国民航大学 | Dielectric barrier discharge plasma air accelerates flow tube |
| CN109131818A (en) * | 2018-08-27 | 2019-01-04 | 中国人民解放军国防科技大学 | Miniaturized underwater bionic thrust vector generation and control 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 |
| CN111577561A (en) * | 2020-04-24 | 2020-08-25 | 南京理工大学 | Device for improving jet intensity of annular electrode exciter and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913386A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for suppressing flow separation of suction surface of wind turbine blade |
| CN102913399A (en) * | 2012-11-06 | 2013-02-06 | 中国科学院工程热物理研究所 | Plasma flow control method for reducing the wake loss of a wind turbine |
| CN103835888B (en) * | 2012-11-20 | 2016-05-11 | 中国科学院工程热物理研究所 | The Apparatus and system of wind energy conversion system brake |
| CN103835888A (en) * | 2012-11-20 | 2014-06-04 | 中国科学院工程热物理研究所 | Device and system for wind turbine braking |
| CN104875894A (en) * | 2015-05-27 | 2015-09-02 | 西北工业大学 | Dielectric barrier discharge plasma anti-icing device and method |
| CN104890881A (en) * | 2015-05-27 | 2015-09-09 | 西北工业大学 | Icing removing device and method of dielectric barrier discharge plasma |
| CN105101603A (en) * | 2015-08-04 | 2015-11-25 | 昆山禾信质谱技术有限公司 | Dielectric barrier discharge plasma gas jet apparatus |
| CN106686874A (en) * | 2017-03-30 | 2017-05-17 | 苏州普拉斯玛精密科技有限公司 | Plasma dielectric barrier discharging circuit |
| CN107484320A (en) * | 2017-07-20 | 2017-12-15 | 中国科学院工程热物理研究所 | Plasma nozzle |
| CN107484320B (en) * | 2017-07-20 | 2019-12-03 | 中国科学院工程热物理研究所 | Plasma nozzle |
| CN107734824A (en) * | 2017-09-08 | 2018-02-23 | 浙江大学 | Dielectric barrier discharge plasma flat board turbulent flow drag reduction device |
| CN108551715A (en) * | 2018-04-23 | 2018-09-18 | 中国民航大学 | Dielectric barrier discharge plasma air accelerates flow tube |
| CN109131818A (en) * | 2018-08-27 | 2019-01-04 | 中国人民解放军国防科技大学 | Miniaturized underwater bionic thrust vector generation and control 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 |
| CN111577561A (en) * | 2020-04-24 | 2020-08-25 | 南京理工大学 | Device for improving jet intensity of annular electrode exciter and working method thereof |
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Application publication date: 20120718 |