CN105514792B - A kind of high energy jet stream exciter - Google Patents

A kind of high energy jet stream exciter Download PDF

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Publication number
CN105514792B
CN105514792B CN201510831444.4A CN201510831444A CN105514792B CN 105514792 B CN105514792 B CN 105514792B CN 201510831444 A CN201510831444 A CN 201510831444A CN 105514792 B CN105514792 B CN 105514792B
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CN
China
Prior art keywords
sparker
jet stream
high energy
exciter
hole
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CN201510831444.4A
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CN105514792A (en
Inventor
单勇
张靖周
吕元伟
谭晓茗
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Nanjing University of Aeronautics and Astronautics
Beijing Institute of Electronic System Engineering
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Nanjing University of Aeronautics and Astronautics
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S4/00Devices using stimulated emission of electromagnetic radiation in wave ranges other than those covered by groups H01S1/00, H01S3/00 or H01S5/00, e.g. phonon masers, X-ray lasers or gamma-ray lasers

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Plasma Technology (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The embodiment of the invention discloses a kind of high energy jet stream exciters, are related to active Flow Control technical field, can increase continuity effluxvelocity and momentum under conditions of continuity jet flow is constant.The method of the present invention includes:Anode 1, sparker shell 2, cathode 3, sparker cavity 4, continuity fluidic channel entrance 5, sparker spray-hole 6, continuity fluidic channel 7, high energy jet stream exciter shell 8 and high energy jet stream exciter spray-hole 9;The inner surface composition continuity fluidic channel 7 of the outer surface of sparker shell 2 and high energy jet stream exciter shell 8;It is high energy jet stream exciter spray-hole 9 close to one end of sparker spray-hole 6 in continuity fluidic channel 7, one end far from high energy jet stream exciter spray-hole 9 is continuity fluidic channel entrance 5.

Description

A kind of high energy jet stream exciter
Technical field
The present invention relates to active Flow Control technical field more particularly to a kind of it can generate the steady of higher momentum or speed Determine the excitation apparatus of jet stream.
Background technology
In the evolution of active Flow Control technology, control field is flowed in order to preferably solve High Speed Flow Field Application problem, devise some control programs and control device.Wherein, high speed synthesizing jet-flow is generated using sparker It is one of the scheme the most feasible of High Speed Flow Field flowing control.
But there is also some technological deficiencies for the scheme of current sparker generation high speed synthesizing jet-flow, such as Although the synthesizing jet-flow jet velocity of formation is big, mass flow is very small, and sparker excitation energy density is big, It causes air themperature and pressure in excitation cavity to be increased sharply, on the one hand has particular requirement to the selection of excitation cavity, on the other hand, It is unfavorable for external environment gas and is sufficient filling with excitation cavity in the backfill stage.Therefore, it needs to reduce in many design schemes and excite Frequency and giving the backfill stage has an enough time, or strengthen the heat exchange of excitation cavity wall and outside air and reach and be lowered into excitation The backfill gas temperature of chamber.But reduce frequency and mean that the jet flow for causing to be excited in same time reduces, The control and ability to function weakening that the synthesizing jet-flow formed in same time flow High Speed Flow Field.Simultaneously as excitation cavity Surface area is smaller, even if undesirable if taking some enhanced heat exchanges to reduce its effect of measure of surface temperature.So individually The synthesizing jet-flow momentum that sparker generates is low, and generator body and inner cavity natural cooling time are longer, working frequency It is low.Drawbacks described above makes the synthesizing jet-flow that sparker generates be difficult to get application in the flowing control of High Speed Flow Field.
Invention content
The embodiment of the present invention provides a kind of high energy jet stream exciter, can be constant in one continuity fluid air inflow Under the conditions of, by the reinforcing of sparker energy, increase considerably continuity effluxvelocity and momentum.Meanwhile this stock connects Continuous property fluid increases the backfill tolerance of sparker chamber, and sparker intracavity gas is restored to the density before work Time used shortens, to increase the working frequency of sparker.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that:
In a first aspect, the embodiment of the present invention provides a kind of high energy jet stream exciter, including:Anode (1), electric spark occur Device shell (2), cathode (3), sparker cavity (4), continuity fluidic channel entrance (5), sparker injection Hole (6), continuity fluidic channel (7), high energy jet stream exciter shell (8) and high energy jet stream exciter spray-hole (9);The electricity The shape of spark generator cavity (4) is cylinder shape belt hole cavity;The shape of the high energy jet stream exciter shell (8) is cylinder Shape cavity with holes;The high energy jet stream exciter shell (8) surrounds the sparker shell (2);The anode (1) and The cathode (3) is connected with external high voltage power supply by conducting wire and is used for spark discharge, and the sparker cavity (4) is another One end open forms the sparker spray-hole (6);The outer surface of the sparker shell (2) and the height The inner surface of energy jet stream exciter shell (8) forms the continuity fluidic channel (7);In the continuity fluidic channel (7) In, it is the high energy jet stream exciter spray-hole (9) close to one end of the sparker spray-hole (6), far from described One end of high energy jet stream exciter spray-hole (9) is the continuity fluidic channel entrance (5).
With reference to first aspect, in the first possible realization method of first aspect, the high energy jet stream exciter spray Perforation (9) is to smoothly transit at converging diverging shape and venturi;The diameter of the sparker spray-hole (6) with it is described The diameter of the venturi of high energy jet stream exciter spray-hole (9) is suitable.
With reference to first aspect, in second of possible realization method of first aspect, outside the high energy jet stream exciter Shell (8) and the diameter that the spacing distance of the sparker shell (2) is the sparker spray-hole (6) 0.5-2.5 times.
With reference to first aspect, in the third possible realization method of first aspect, the sparker cavity (4) material is the good metal material of heat conductivility;The material of the high energy jet stream exciter shell (8) is insulating materials.
High energy jet stream exciter provided in an embodiment of the present invention is sent out with the electric spark at present without continuity fluidic channel Raw device is compared, and the present embodiment generates the injection phase of jet stream in sparker, has increased considerably the speed of continuity jet stream Degree and momentum;Meanwhile in the sucting stage of sparker, the more multi-temperature of generator sucking is lower, density bigger company Continuous property Gas Jet, has more sparker intracavity gas that can be utilized in next period.To realize continuous Property jet stream air inflow it is constant under conditions of, by the reinforcing of electric spark energy, increase considerably continuity effluxvelocity and its dynamic Amount.Meanwhile the tolerance of sparker backfill increases, sparker intracavity gas is restored to used in the density before work Time shortens the time, and the working frequency of sparker can improve.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is the schematic diagram of high energy jet stream exciter provided in an embodiment of the present invention;
Fig. 2 is the dimensional structure diagram of high energy jet stream exciter provided in an embodiment of the present invention;
Each label of attached drawing indicates:1. anode;2. high energy jet stream exciter shell;3. cathode;4. high energy jet stream excites Device cavity;5. continuity fluidic channel entrance;6. high energy jet stream exciter spray-hole;7. continuity fluidic channel;8. high energy is penetrated Flow exciter shell;9. high energy jet stream exciter spray-hole.
Specific implementation mode
It is below in conjunction with the accompanying drawings and specific real to make those skilled in the art more fully understand the technical solution of the utility model Mode is applied to be described in further detail the utility model.The embodiment of the utility model is described in more detail below, it is described The example of embodiment is shown in the accompanying drawings, in which the same or similar labels are throughly indicated same or similar element or Element with the same or similar functions.It is exemplary below with reference to the embodiment of attached drawing description, is only used for explaining The utility model, and limitations of the present invention cannot be construed to.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being used in the specification of the utility model Wording " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or Other one or more features of addition, integer, step, operation, element, component and/or their group.It should be understood that working as us Claim element to be " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or can also There are intermediary elements.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.It is used herein to arrange Diction "and/or" includes any cell of one or more associated list items and all combines.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific terminology) there is meaning identical with the general understanding of the those of ordinary skill in the utility model fields.Also It should be understood that those terms such as defined in the general dictionary should be understood that with in the context of the prior art The consistent meaning of meaning, and unless defined as here, will not be explained with the meaning of idealization or too formal.
Sparker provided in an embodiment of the present invention, as shown in Figure 1 and Figure 2, including:Anode (1), electric spark hair Raw device shell (2), cathode (3), sparker cavity (4), continuity fluidic channel entrance (5), sparker spray Perforation (6), continuity fluidic channel (7), high energy jet stream exciter shell (8) and high energy jet stream exciter spray-hole (9).
Wherein, the shape of sparker cavity (4) is cylinder shape belt hole cavity, high energy jet stream exciter shell (8) Shape be cylinder shape belt hole cavity, high energy jet stream exciter shell (8) surround sparker shell (2), anode (1) and Cathode (3) is connected with external high voltage power supply by conducting wire and is used for spark discharge, sparker cavity (4) another end opening Form sparker spray-hole (6), outer surface and the high energy jet stream exciter shell (8) of sparker shell (2) Inner surface composition continuity fluidic channel (7), in continuity fluidic channel (7), close to sparker spray-hole (6) One end be high energy jet stream exciter spray-hole (9), far from high energy jet stream exciter spray-hole (9) one end be continuity jet stream Feeder connection (5).
In the present embodiment, when sparker does not work, fluid is entered by continuity fluidic channel entrance (5) Continuity fluidic channel (7) is finally flowed out from high energy jet stream exciter spray-hole (9), is generated for controlling High Speed Flow Field flowing Jet stream.When sparker works, anode (1) and cathode (3) by conducting wire under certain frequency with external high pressure Power supply is connected and loads high voltage, existing high electrical breakdown air between anode (1) and cathode (3), generates spark discharge, electricity The energy of spark acts on the air in sparker cavity (4), the pressure and temperature for the air that increases sharply, high pressure-temperature Air is sprayed from sparker spray-hole (6), and the high speed spark-type synthesizing jet-flow of ejection makes high energy jet stream exciter spray Air-flow at perforation (9) accelerates to spray, the speed and momentum of injection so that successional jet stream is strengthened;Work as electric spark Air pressure in generator cavity (4) drops below sparker with the injection of high speed spark-type synthesizing jet-flow When Fluid pressure at spray-hole (6), portion gas in continuity fluidic channel (7) is from sparker spray-hole (6) It is flowed into sparker cavity (4), supplements the quality of intracavity gas, high speed spark-type is excited for next spark discharge Synthesizing jet-flow accumulates gas.Since the volume of sparker cavity (4) is very small, the gas of accumulation does not interfere with high energy Air flow rate at jet stream exciter spray-hole (9).
Also, one gas is flowed into from continuity fluidic channel entrance (5), by continuity fluidic channel (7), to right Sparker shell (2) is cooled down, and protects sparker shell (2), while reducing sparker Gas temperature in cavity (4).
Further, the high energy jet stream exciter spray-hole (9) in the present embodiment is light at converging diverging shape and venturi It slips over and crosses;The diameter of sparker spray-hole (6) is suitable with the diameter of venturi of high energy jet stream exciter spray-hole (9).
When sparker is run, the spark-type synthesizing jet-flow that sparker spray-hole (6) sprays pushes simultaneously Strengthen the continuity jet stream at high energy jet stream exciter spray-hole (9), air-flow at high energy jet stream exciter spray-hole (9) at this time Speed continue to accelerate at the channel of converging diverging shape, the speed and momentum of air-flow continue growing.
Further, the interval of the high energy jet stream exciter shell (8) and sparker shell (2) in the present embodiment Distance is 0.5-2.5 times of the diameter of sparker spray-hole (6).
In the present embodiment, continuity fluidic channel (7) channel height, sparker cavity (4) volume, electric spark The diameter of generator spray-hole (6) and the diameter at high energy jet stream exciter spray-hole (9) venturi will influence spark-type synthesis and penetrate Flow the invigoration effect to continuity jet stream.
In the preferred embodiment of the present embodiment, sparker cavity (4) small volume, when sparker sprays When the diameter in hole (6) is identical as the diameter at high energy jet stream exciter spray-hole (9) venturi, high energy jet stream exciter shell (8) Spacing distance with sparker shell (2) is within the scope of 0.5-2.5 times of the diameter of sparker spray-hole (6) Spark-type synthesizing jet-flow is the most apparent to the reinforcing effect of continuity jet stream.
Optionally, the material of the sparker cavity (4) in the present embodiment is the good metal of heat conductivility;High energy The material of jet stream exciter shell (8) is insulating materials.
In the practical application of the present embodiment, the shape of sparker is designed as cylinder shape belt hole cavity.Wherein, positive Pole (1), cathode (3) are located at sparker cavity (4) bottom.Anode (1) passes through screw thread with sparker shell (2) Connection.Anode (1) and cathode (3) are connected realization by conducting wire in certain spark discharge under controlling frequency with external high voltage power supply. Sparker cavity (4) other end is sparker spray-hole (6), and sparker spray-hole (6) is cylinder Shape straight hole.The material of sparker shell (2) is the good metal of heat conductivility.The structure of anode (1) and cathode (3) is joined Number and material are identical as common pillar electric plug.The outside of sparker shell (2) includes the excitation of high energy jet stream Device spray-hole (9), high energy jet stream exciter shell (8), continuity fluidic channel (7) and continuity fluidic channel entrance (5).Electricity Spark generator shell (2) and high energy jet stream exciter shell (8) form continuity fluidic channel (7) channel, and high energy jet stream swashs The shape for sending out device shell (8) is cylinder shape belt hole cavity.High energy jet stream exciter shell (8) one end is that shape is the continuous of annular Property fluidic channel entrance (5), the other end be high energy jet stream exciter spray-hole (9).High energy jet stream exciter shell (8) is insulation Material.High energy jet stream exciter spray-hole (9) is to smoothly transit at converging diverging shape and venturi.Sparker sprays The diameter in hole (6) is suitable with the diameter at high energy jet stream exciter spray-hole (9) venturi.
When sparker is run, continuity fluidic channel entrance (5) is passed through the gas of certain pressure and flow, even The continuous pressure difference Ratio control of property fluidic channel entrance (5) and high energy jet stream exciter spray-hole (9) outside between 1.1-1.8 most Excellent, high energy jet stream exciter spray-hole (9) generates the continuity jet stream of one high energy.Due to continuity fluidic channel entrance (5) To flow resistance is identical everywhere between sparker spray-hole (6), the air-flow to liquidate makes sparker spray-hole (6) the flowing velocity on place's axis is zero, flowing stagnation point, pressure and electrical fire in sparker cavity (4) occurs Pressure is identical at flower generator spray-hole (6), and it is empty that air-flow will not enter sparker from sparker spray-hole (6) Chamber (4).After jet stability, external high voltage power supply to discharge between anode (1) and cathode (3), the spark energy after electric discharge The inner gas of amount heat electric fire flower generator cavity (4) makes the drastically body of the temperature and pressure in sparker cavity (4) Height generates the spark-type synthesizing jet-flow of high speed at sparker spray-hole (6), and spark-type synthesizing jet-flow is far longer than at this time The continuity jet stream generated at continuity fluidic channel entrance (5), the spark-type synthesis at sparker spray-hole (6) are penetrated The continuity jet stream at high energy jet stream exciter spray-hole (9) will be pushed and strengthens by flowing, at high energy jet stream exciter spray-hole (9) The speed and momentum of air-flow greatly increase.Hereafter, since the gas in continuity fluidic channel (7) is to sparker shell (2) temperature and pressure of cooling effect, the gas in sparker cavity (4) reduces, sparker start from Sparker spray-hole (6) sucks gas outside, and the gas for entering bypass pipe from continuity fluidic channel entrance (5) at this time is exhausted Most of to be flowed out from high energy jet stream exciter spray-hole (9), few part flows into electric spark from sparker spray-hole (6) Gas in generator cavity (4) supplement and cooling sparker cavity (4), sparker cavity (4) suck gas The process of body be continued until next time between anode (1) and cathode (3) discharge until, the periodic work of sparker Make, the spark-type synthesizing jet-flow at sparker spray-hole (6) periodically strengthens high energy jet stream exciter spray-hole (9) The continuity jet stream at place, the speed of practical jet stream and momentum increase at high energy jet stream exciter spray-hole (9).
Since existing sparker does not have continuity fluidic channel (7) structure, penetrated with without continuity The sparker of circulation road (7) is compared, and the present embodiment increases in injection phase, the speed and momentum of continuity jet stream Add, meanwhile, the more multi-temperature of sucting stage, exciter sucking is lower, and the gas of density bigger has more chambers in next period Interior gas can be utilized.To realize under conditions of air inflow is constant, increase by the continuity effluxvelocity that spark is strengthened Add, momentum increases.Meanwhile the tolerance of sparker backfill increases, before sparker intracavity gas is restored to work Density used in the time shorten the time, the working frequency of sparker can increase considerably.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for equipment reality For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method Part explanation.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, all answer by the change or replacement that can be readily occurred in It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims (3)

1. a kind of high energy jet stream exciter, which is characterized in that including:Anode (1), sparker shell (2), cathode (3), Sparker cavity (4), continuity fluidic channel entrance (5), sparker spray-hole (6), continuity jet stream are logical Road (7), high energy jet stream exciter shell (8) and high energy jet stream exciter spray-hole (9);
The shape of the sparker cavity (4) is cylinder shape belt hole cavity;
The shape of the high energy jet stream exciter shell (8) is cylinder shape belt hole cavity;
The high energy jet stream exciter shell (8) surrounds the sparker shell (2);
The anode (1) and the cathode (3) are connected with external high voltage power supply by conducting wire and are used for spark discharge, the electrical fire Flower generator cavity (4) other end is open to form the sparker spray-hole (6);
The outer surface of the sparker shell (2) and the inner surface of the high energy jet stream exciter shell (8) form institute State continuity fluidic channel (7);
It is that the high energy is penetrated close to one end of the sparker spray-hole (6) in the continuity fluidic channel (7) Exciter spray-hole (9) is flowed, one end far from the high energy jet stream exciter spray-hole (9) is that the continuity fluidic channel enters Mouth (5).
2. high energy jet stream exciter according to claim 1, which is characterized in that the high energy jet stream exciter shell (8) Spacing distance with the sparker shell (2) is the 0.5-2.5 of the diameter of the sparker spray-hole (6) Times.
3. high energy jet stream exciter according to claim 1, which is characterized in that the sparker cavity (4) Material is the metal material of Thermal conductivity;
The material of the high energy jet stream exciter shell (8) is insulating materials.
CN201510831444.4A 2015-11-25 2015-11-25 A kind of high energy jet stream exciter Expired - Fee Related CN105514792B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106394875B (en) * 2016-10-10 2018-06-26 南京航空航天大学 A kind of spark-type synthesizing jet-flow exciter and its control method based on solenoid valve
CN106507575B (en) * 2016-10-10 2018-07-27 南京航空航天大学 A kind of plasma synthesis jet-flow excitor for high-altitude vehicle

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JPH02211333A (en) * 1989-02-08 1990-08-22 Natl Aerospace Lab Plasma jet ignition system
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CN204014247U (en) * 2014-09-02 2014-12-10 厦门大学 A kind of acceleration jet flow generating apparatus
CN104604338A (en) * 2012-08-29 2015-05-06 全面熔合有限公司 Apparatus for accelerating and compressing plasma

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Publication number Priority date Publication date Assignee Title
JPH02211333A (en) * 1989-02-08 1990-08-22 Natl Aerospace Lab Plasma jet ignition system
CN1220370A (en) * 1997-12-17 1999-06-23 亚瑞亚·勃朗勃威力有限公司 Method and device for injecting fuel/liquid mixture into combustion chamber of burner
CN104604338A (en) * 2012-08-29 2015-05-06 全面熔合有限公司 Apparatus for accelerating and compressing plasma
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