CN110126860A - A kind of adaptive plasma damping device and drag reduction control method - Google Patents
A kind of adaptive plasma damping device and drag reduction control method Download PDFInfo
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- CN110126860A CN110126860A CN201910454380.9A CN201910454380A CN110126860A CN 110126860 A CN110126860 A CN 110126860A CN 201910454380 A CN201910454380 A CN 201910454380A CN 110126860 A CN110126860 A CN 110126860A
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- electrode
- handle
- tooth
- damping device
- dielectric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a kind of adaptive plasma damping device and drag reduction control methods, belong to train pneumatic technical field.Comprising: which exposure electrode, dielectric and insertion electrode, exposure electrode and insertion electrode are separately positioned on the two sides up and down of dielectric；Exposure electrode includes electrode handle and electrode tooth, and electrode tooth is in filament shape and the side for being evenly distributed on electrode handle；Electrode handle is arranged on dielectric, and the material of electrode tooth is flexible metallic material；The two sides on dielectric and being separately positioned on electrode handle are arranged in insertion electrode, and insertion electrode is greater than the length of electrode tooth at a distance of the distance of electrode handle.The present invention can be discharged by electrode tooth in the case where not changing car body surface shape and form one layer of plasma (orifice) gas fluid layer in car body surface to regulate and control vehicle body flow field, to reduce air drag suffered by car body, and then play the effect of drag reduction；Additional control element is not needed simultaneously, reduces installation cost.
Description
Technical field
The present invention relates to train pneumatic technical fields, and in particular to a kind of adaptive plasma damping device and drag reduction
Control method relates more specifically to the two way train damping device and drag reduction controlling party of a kind of adaptive plasma
Method.
Background technique
High-speed railway is the inexorable trend of China's electric railway development, and exploring the higher overall trip speed of train is current railway
The target that worker pursues.From 2004, High Speed Train in China entered Rapid development stage.Consequent is train air
Resistance problem increasingly sharpens, and when train running speed is 200km/h, air drag has reached the 70% of drag overall, and China
Current high-speed railway military service speed is already up to 350km/h.Air resistance problem is increasingly sharpened, and train pneumatic characteristic urgently changes
It is kind.
Original train drag reduction technology focuses mostly in the application of streamline body design and bionic non-smooth surface, but at present
Such passive flow control technique has fallen into bottleneck, limited potential.Although now there is the technology of part active Flow Control,
But still there is the problems such as structure is complicated, functional reliability is poor.And in two way train drag reduction technology, because it is two-way
Traveling, therefore generally require to install positive and negative two sets of plasma damping device, and it also requires Additional regulatory.
Summary of the invention
The purpose of the present invention is to provide a kind of adaptive plasma damping device and drag reduction control methods, to solve
Structure is complicated, functional reliability is poor in active drag reduction control technology in existing train especially two way train, also needs to install
The problem of positive and negative two sets of plasma damping device.
The technical scheme to solve the above technical problems is that
A kind of adaptive plasma damping device, comprising: exposure electrode, dielectric and insertion electrode, exposure electrode
The two sides up and down of dielectric are separately positioned on insertion electrode；Exposure electrode includes electrode handle and electrode tooth, and electrode tooth is in thin
Side that is Filamentous and being evenly distributed on electrode handle；Electrode handle is arranged on dielectric, and the material of electrode tooth is flexible metal material
Material；The two sides on dielectric and being separately positioned on electrode handle, distance of the insertion electrode at a distance of electrode handle is arranged in insertion electrode
Greater than the length of electrode tooth.
Its electrode tooth of the exposure electrode that the present invention uses, can be with the air-flow of car body traveling for filament type flexible metal material
Direction change automatically and adjust electrode tooth direction and it is consistent with airflow direction, at this moment electrode tooth electric discharge generate with airflow direction one
The driving direction of the plasma wind of cause, the plasma wind and train is adapted, and the air drag of car body is effectively reduced, to rise
To the effect of drag reduction.The direction of electrode tooth can be consistent with airflow direction in damping device of the invention, therefore is adaptable to two-way
Travel train.
Further, in preferred embodiments of the present invention, the one end of above-mentioned electrode tooth far from electrode handle is tip.
Further, in preferred embodiments of the present invention, above-mentioned insertion electrode is symmetrically arranged at the two of electrode handle
Side.
Further, in preferred embodiments of the present invention, the material of above-mentioned electrode handle is copper.
Further, in preferred embodiments of the present invention, the material of above-mentioned electrode tooth is tungsten.
Further, in preferred embodiments of the present invention, the material of above-mentioned insertion electrode is copper.
A kind of adaptive plasma drag reduction control method utilizes above-mentioned adaptive plasma damping device, comprising:
(1) above-mentioned adaptive plasma damping device is mounted on to the top outer of train, wherein insertion electrode is close
It is enclosed in vehicle body, dielectric and exposure electrode are located at train outer surface；
(2) apply high-frequency ac high voltage power supply outside electrode handle, and will insertion electrode ground connection；High-frequency ac exports high pressure
U, in the range of UL< < U < UD；
Wherein, ULFor electrode tooth tip away from insertion electrode the corresponding breakdown voltage of distance L；UDFor the electrode handle away from
It is embedded in the corresponding breakdown voltage of distance D of electrode.
Further, in preferred embodiments of the present invention, above-mentioned high-frequency ac exports high pressure U,
The invention has the following advantages:
1, the present invention can be discharged by electrode tooth in the case where not changing car body surface shape and form one in car body surface
Layer plasma (orifice) gas fluid layer regulates and controls vehicle body flow field, to reduce air drag suffered by car body, and then plays the effect of drag reduction；Simultaneously
Additional control element is not needed, installation cost is reduced.
2, the present invention uses the exposure electrode with tip, because dielectric surface can be effectively reduced in its point effect
Breakdown voltage, very big the flash-over characteristic for improving exposed electrode, can effectively reinforce the air-flow of plasma (orifice) gas fluid layer, to mention
The high effect of drag reduction.This is because the position of electric discharge can be effectively controlled by the position at control tip, under some scale
So that exposure electrode discharge is more uniform, generated air-flow is more stable.Furthermore the reduction of breakdown voltage, which can allow, discharges more
Frequently, and make the air-flow generated bigger.
3, the present invention uses the electrode tooth of filament type flexible metal material, can change automatically with the airflow direction that car body travels
Become and adjust electrode tooth direction and it is consistent with airflow direction so that exposure electrode generate it is consistent with airflow direction and with traveling side
To adaptable plasma wind, so as to be suitable for two way train.Detailed description of the invention
Fig. 1 is the structural schematic diagram of plasma damping device of the invention；
Fig. 2 is the side structure schematic view of plasma damping device of the invention；
Fig. 3 is the structural schematic diagram of electrode tooth in plasma damping device of the invention；
Fig. 4 is the air velocity test chart of exposure electrode of the invention.
In figure: 100- exposure electrode；110- electrode handle；120- electrode tooth；The tip 121-；200- dielectric；300- is embedding
Enter electrode.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment
Referring to Fig.1 and 2, adaptive plasma damping device of the invention, comprising: exposure electrode 100, insulation are situated between
Matter 200 and insertion electrode 300, exposure electrode 100 and insertion electrode 300 are separately positioned on the two sides up and down of dielectric 200.
Fig. 1 and Fig. 3 are please referred to, exposure electrode 100 includes electrode handle 110 and electrode tooth 120, and electrode tooth 120 is uniformly distributed
In the side of electrode handle 110, in the present embodiment, electrode tooth 120 is in dense distribution, and exposure electrode 100 is in pectination.Wherein, electric
Pole handle 110 is arranged on dielectric 200, and electrode tooth 120 is in filament shape, and the material of electrode tooth 120 is flexible metallic material,
It can be under the airflow function of car body, and electrode tooth 120 is moved reciprocatingly with electrode handle 110 for rotary shaft, thus automatically change and
The direction of electrode tooth 120 is adjusted, so that plasma wind and the driving direction of train that the exposure electric discharge of electrode 100 generates mutually are fitted
It answers.The one end of electrode tooth 120 far from electrode handle 110 is tip 121, and the breakdown potential on 200 surface of dielectric can be effectively reduced
Pressure, very big the flash-over characteristic for improving exposed electrode 100, can effectively reinforce the air-flow of plasma (orifice) gas fluid layer, to improve
The effect of drag reduction.In the present embodiment, the material of electrode handle 110 is copper, the electrode handle 110 of copper product its by stream effect it is good and
Intensity is high, electrode tooth 120 can be fixed on to Train surface, while by electric current uniform conductive to electrode tooth 120；Electrode tooth 120
Material is tungsten, and tungsten wire is high-temperature-resistant flexible metal material, can be easier to change its direction with the air-flow that car body travels.
Dielectric 200 is located at car body surface, uses heat resistance, the good nonmetallic materials of insulation performance in the present embodiment, excellent
It is selected as quartz glass.
Referring to Fig.1 and 2, insertion electrode 300 is arranged on dielectric 200 and is separately positioned on electrode handle 110
Two sides, it is preferable that insertion 300 part of electrode is embedded in inside dielectric 200.Be embedded in electrode 300 at a distance of electrode handle 110 away from
From the length for being greater than electrode tooth 120, and it is embedded in electrode 300 and is sealed in vehicle body.In the present embodiment, insertion electrode 300 divides
It is not symmetricly set on the two sides of electrode handle 110.High-frequency ac high voltage power supply is applied outside electrode handle 110, insertion electrode 300 is grounded；It is high
Frequency exchange output high pressure U, in the range of UL< < U < UD；Wherein, ULFor electrode tooth 120 tip 121 away from insertion electrode 300
The corresponding breakdown voltage of distance L, wherein the range of L is 3mm-5mm；UDD pairs of distance for electrode handle 110 away from insertion electrode 300
The breakdown voltage answered.Since high-frequency ac output high pressure U is greater than breakdown voltage U corresponding to electrode toothL, and it is less than electrode handle institute
Corresponding breakdown voltage UD, therefore only side pointed by electrode tooth is discharged, and generates the plasma wind along airflow direction.
Preferably, high-frequency ac exports high pressure U,In the present embodiment, the material for being embedded in electrode 300 is copper, copper material
The insertion electrode 300 of material its by stream, effect is good and intensity is high, plasma can be generated rapidly with exposed electrode.
The air velocity of exposure electrode and traditional electrode in the present invention is tested, result is as shown in Figure 4.Wherein, X
The surface distance exposure electrode distance of axis indicates: along the distance of dielectric surface distance exposure eletrode tip
From fig. 4, it can be seen that its air velocity of exposure electrode of the invention is far longer than the air velocity of traditional electrode, and
And from the point of view of its maximum value, the air velocity of exposure electrode of the invention improves 35.6% compared with traditional electrode, illustrates the present invention
The performance of exposure electrode to be much better than traditional electrode.And air velocity is bigger, and the drag-reduction effect that damping device plays also is got over
Obviously.
The installation site of damping device of the invention is car body top outer surface, covers along car body area, mainly concentrates
In the position that body shapes change greatly.
Adaptive plasma drag reduction control method of the invention, comprising:
(1) above-mentioned adaptive plasma damping device is mounted on to the top outer of train, wherein insertion electrode is close
It is enclosed in vehicle body, dielectric and exposure electrode are located at train outer surface；
(2) apply high-frequency ac high voltage power supply outside electrode handle, and will insertion electrode ground connection；High-frequency ac exports high pressure
U, in the range of UL< < U < UD；
Wherein, ULThe corresponding breakdown voltage of distance L of electrode is embedded in for electrode tooth pitch；UDIt is the electrode handle away from insertion electricity
The corresponding breakdown voltage of distance D of pole.
Further, in preferred embodiments of the present invention, above-mentioned high-frequency ac exports high pressure U,
The working principle of the invention and its process:
When train operation reaches certain speed per hour, controller opens the height of adaptive plasma damping device of the invention
The alternating current of high-frequency and high-voltage is applied between exposed electrode 100 and insertion electrode 300 by frequency ac high voltage source, of the invention
Plasma damping device is started to work, since the electrode tooth 120 in exposure electrode 100 is using the flexible metal material of filament type
Material, therefore when the operation speed per hour of train reaches certain value, the high-speed flow of car body surface will drive the electrode of exposed motor
Tooth 120 is rotated with electrode handle 110 for rotary shaft, and at this moment the direction of electrode tooth 120 changes and the direction of good luck air-flow
It arranges.Since high-frequency ac output high pressure U is greater than breakdown voltage U corresponding to electrode tooth 120L, and it is less than electrode handle 110
Corresponding breakdown voltage UD, therefore only side pointed by electrode tooth 120 is discharged, and generates the plasma along airflow direction
Body wind.When train changes direction, the electrode tooth 120 in the exposure electrode 100 of this damping device can be under the action of high-speed flow
It is brought towards another side, the direction of plasma flow layer also changes correspondingly.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of adaptive plasma damping device characterized by comprising exposure electrode (100), dielectric (200)
With insertion electrode (300), the exposed electrode (100) and the insertion electrode (300) are separately positioned on the dielectric
(200) two sides up and down；
The exposed electrode (100) includes electrode handle (110) and electrode tooth (120), and the electrode tooth (120) is in filament shape and
The even side for being distributed in the electrode handle (110)；The electrode handle (110) is arranged on the dielectric (200), the electricity
The material of pole tooth (120) is flexible metallic material；
Insertion electrode (300) is arranged on the dielectric (200) and is separately positioned on the two of the electrode handle (110)
Side, insertion electrode (300) are greater than the length of the electrode tooth (120) at a distance of the distance of the electrode handle (110).
2. adaptive plasma damping device according to claim 1, which is characterized in that the electrode tooth (120) is remote
One end from the electrode handle (110) is tip (121).
3. adaptive plasma damping device according to claim 1, which is characterized in that the insertion electrode (300)
It is symmetrically arranged at the two sides of the electrode handle (110).
4. adaptive plasma damping device according to claim 1-3, which is characterized in that the electrode handle
(110) material is copper.
5. adaptive plasma damping device according to claim 1-3, which is characterized in that the electrode tooth
(120) material is tungsten.
6. adaptive plasma damping device according to claim 1-3, which is characterized in that the insertion electricity
The material of pole (300) is copper.
7. a kind of adaptive plasma drag reduction control method, using it is as claimed in any one of claims 1 to 6 it is adaptive it is equal from
Daughter damping device, which is characterized in that including
(1) above-mentioned adaptive plasma damping device is mounted on to the top outer of train, wherein insertion electrode is sealed in
Vehicle body, dielectric and exposure electrode are located at train outer surface；
(2) apply high-frequency ac high voltage power supply outside electrode handle, and will insertion electrode ground connection；High-frequency ac exports high pressure U,
Range is UL< < U < UD；
Wherein, ULFor electrode tooth tip away from insertion electrode the corresponding breakdown voltage of distance L；UDIt is electrode handle away from insertion electrode
The corresponding breakdown voltage of distance D.
8. adaptive plasma drag reduction control method as claimed in claim 7, which is characterized in that the high-frequency ac output
High pressure U,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454380.9A CN110126860B (en) | 2019-05-29 | 2019-05-29 | Self-adaptive plasma resistance reducing device and resistance reducing control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910454380.9A CN110126860B (en) | 2019-05-29 | 2019-05-29 | Self-adaptive plasma resistance reducing device and resistance reducing control method |
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| CN110126860A true CN110126860A (en) | 2019-08-16 |
| CN110126860B CN110126860B (en) | 2020-07-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2322272A1 (en) * | 2008-07-17 | 2011-05-18 | Kabushiki Kaisha Toshiba | Air current generating apparatus and method for manufacturing same |
| CN103287575A (en) * | 2013-06-07 | 2013-09-11 | 上海交通大学 | Method for reducing surface resistance based on plasma exciting device |
| JP2014103094A (en) * | 2012-08-08 | 2014-06-05 | National Institute Of Advanced Industrial & Technology | Surface plasma actuator |
| EP3054747A1 (en) * | 2015-02-05 | 2016-08-10 | Kabushiki Kaisha Toshiba | Airflow generation device |
| CN109501824A (en) * | 2018-12-28 | 2019-03-22 | 西南交通大学 | A kind of bullet train drag reduction method and device based on plasma |
-
2019
- 2019-05-29 CN CN201910454380.9A patent/CN110126860B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2322272A1 (en) * | 2008-07-17 | 2011-05-18 | Kabushiki Kaisha Toshiba | Air current generating apparatus and method for manufacturing same |
| JP2014103094A (en) * | 2012-08-08 | 2014-06-05 | National Institute Of Advanced Industrial & Technology | Surface plasma actuator |
| CN103287575A (en) * | 2013-06-07 | 2013-09-11 | 上海交通大学 | Method for reducing surface resistance based on plasma exciting device |
| EP3054747A1 (en) * | 2015-02-05 | 2016-08-10 | Kabushiki Kaisha Toshiba | Airflow generation device |
| CN109501824A (en) * | 2018-12-28 | 2019-03-22 | 西南交通大学 | A kind of bullet train drag reduction method and device based on plasma |
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| CN110126860B (en) | 2020-07-21 |
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