CN110126860B - Self-adaptive plasma resistance reducing device and resistance reducing control method - Google Patents
Self-adaptive plasma resistance reducing device and resistance reducing control method Download PDFInfo
- Publication number
- CN110126860B CN110126860B CN201910454380.9A CN201910454380A CN110126860B CN 110126860 B CN110126860 B CN 110126860B CN 201910454380 A CN201910454380 A CN 201910454380A CN 110126860 B CN110126860 B CN 110126860B
- Authority
- CN
- China
- Prior art keywords
- electrode
- embedded
- teeth
- handle
- insulating medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma Technology (AREA)
Abstract
The invention discloses a self-adaptive plasma resistance reducing device and a resistance reducing control method, and belongs to the technical field of train pneumatics. It includes: the device comprises an exposed electrode, an insulating medium and an embedded electrode, wherein the exposed electrode and the embedded electrode are respectively arranged on the upper side and the lower side of the insulating medium; the exposed electrode comprises an electrode handle and electrode teeth, and the electrode teeth are in a filament shape and are uniformly distributed on one side of the electrode handle; the electrode handle is arranged on the insulating medium, and the electrode teeth are made of flexible metal materials; the embedded electrodes are arranged on the insulating medium and are respectively arranged on two sides of the electrode handle, and the distance between the embedded electrodes and the electrode handle is greater than the length of the electrode teeth. The invention can form a plasma airflow layer on the surface of the vehicle body by the discharge of the electrode teeth under the condition of not changing the surface appearance of the vehicle body so as to regulate and control the flow field of the vehicle body, thereby reducing the air resistance borne by the vehicle body and further playing a role in reducing the resistance; and meanwhile, no additional control element is needed, and the installation cost is reduced.
Description
Technical Field
The invention relates to the technical field of train aerodynamics, in particular to a self-adaptive plasma anti-drag device and an anti-drag control method, and more particularly relates to a self-adaptive plasma two-way running train anti-drag device and an anti-drag control method.
Background
The high-speed railway is a necessary trend of the development of the electrified railway in China, and the pursuit of higher operation speed of trains is a target pursued by railway workers at present. Since 2004, high-speed trains in China enter a rapid development stage. The problem of the air resistance of the train is increasingly aggravated, when the running speed of the train is 200km/h, the air resistance reaches 70 percent of the total resistance, and the current service speed of the high-speed railway in China reaches 350 km/h. The air resistance problem is increasingly aggravated, and the pneumatic characteristics of the train are in need of improvement.
The prior train drag reduction technology mostly focuses on streamline vehicle body design and application of bionic non-smooth surface, but the passive flow control technology falls into the bottleneck at present and has limited potential. Although the technology of partial active flow control exists at present, the problems of complex structure, poor working reliability and the like still exist. In addition, in the two-way running train drag reduction technology, due to the fact that the train runs in two ways, a front set and a back set of plasma drag reduction devices are often required to be installed, and extra regulation and control are also required.
Disclosure of Invention
The invention aims to provide a self-adaptive plasma resistance reducing device and a resistance reducing control method, and aims to solve the problems that the structure is complex, the working reliability is poor, and a front set and a back set of plasma resistance reducing devices are required to be installed in the active resistance reducing control technology of the existing train, particularly a bidirectional running train.
The technical scheme for solving the technical problems is as follows:
an adaptive plasma fairing comprising: the device comprises an exposed electrode, an insulating medium and an embedded electrode, wherein the exposed electrode and the embedded electrode are respectively arranged on the upper side and the lower side of the insulating medium; the exposed electrode comprises an electrode handle and electrode teeth, and the electrode teeth are in a filament shape and are uniformly distributed on one side of the electrode handle; the electrode handle is arranged on the insulating medium, and the electrode teeth are made of flexible metal materials; the embedded electrodes are arranged on the insulating medium and are respectively arranged on two sides of the electrode handle, and the distance between the embedded electrodes and the electrode handle is greater than the length of the electrode teeth.
The electrode teeth of the exposed electrode are made of thin-wire flexible metal materials, the electrode teeth can be automatically changed along with the running direction of the train body, the orientation of the electrode teeth is adjusted and is consistent with the direction of the air flow, the electrode teeth discharge to generate plasma wind consistent with the direction of the air flow, the plasma wind is adaptive to the running direction of the train, the air resistance of the train body is effectively reduced, and the effect of reducing the resistance is achieved. The orientation of the electrode teeth in the fairing can be consistent with the direction of air flow, so that the fairing is suitable for a two-way running train.
Further, in a preferred embodiment of the present invention, the end of the electrode teeth away from the electrode shank is a tip.
Further, in a preferred embodiment of the present invention, the embedded electrodes are symmetrically disposed on both sides of the electrode handle.
Further, in a preferred embodiment of the present invention, the material of the electrode handle is copper.
Further, in a preferred embodiment of the present invention, the electrode teeth are made of tungsten.
Further, in a preferred embodiment of the present invention, the material of the embedded electrode is copper.
A self-adaptive plasma drag reduction control method utilizes the self-adaptive plasma drag reduction device, and comprises the following steps:
(1) the self-adaptive plasma damping device is arranged on the outer side of the top of a train, wherein an embedded electrode is sealed in the train body, and an insulating medium and an exposed electrode are positioned on the outer surface of the train;
(2) applying a high-frequency alternating-current high-voltage power supply outside the electrode handle, and grounding the embedded electrode; high frequency AC output high voltage U in the range of UL<U<UD；
Wherein, ULBreakdown voltage corresponding to the distance L from the tip of the electrode tooth to the embedded electrodeDThe breakdown voltage corresponds to the distance D of the electrode handle from the embedded electrode.
Further, in the preferred embodiment of the present invention, the high frequency ac output high voltage U,
。
the invention has the following beneficial effects:
1. the invention can form a plasma airflow layer on the surface of the vehicle body by the discharge of the electrode teeth under the condition of not changing the surface appearance of the vehicle body so as to regulate and control the flow field of the vehicle body, thereby reducing the air resistance borne by the vehicle body and further playing a role in reducing the resistance; and meanwhile, no additional control element is needed, and the installation cost is reduced.
2. The invention adopts the exposed electrode with the tip, and the tip effect can effectively reduce the breakdown voltage of the surface of the insulating medium, greatly improve the discharge characteristic of the exposed electrode, and effectively strengthen the airflow of the plasma airflow layer, thereby improving the drag reduction effect. This is because the position of the discharge can be effectively controlled by controlling the position of the tip, so that the discharge of the exposed electrode is more uniform in a certain scale, and the generated airflow is more stable. Further, the reduction in breakdown voltage allows for more frequent discharges and greater airflow.
3. The invention adopts the electrode teeth made of the filament type flexible metal material, which can automatically change along with the direction of the air flow of the train body, and adjust the orientation of the electrode teeth to be consistent with the direction of the air flow, so that the exposed electrode generates plasma wind which is consistent with the direction of the air flow and is adaptive to the running direction, thereby being applicable to bidirectional running trains.
Drawings
FIG. 1 is a schematic structural diagram of a plasma fairing of the present invention;
FIG. 2 is a schematic diagram of a side view of the plasma fairing of the present invention;
FIG. 3 is a schematic structural view of electrode teeth in the plasma fairing of the present invention;
fig. 4 is a graph showing the gas flow rate test of the exposed electrode of the present invention.
In the figure: 100-exposed electrodes; 110-electrode shank; 120-electrode teeth; 121-tip; 200-an insulating medium; 300-embedded electrodes.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1 and fig. 2, the adaptive plasma drag reduction device of the present invention includes: the exposed electrode 100, the insulating dielectric 200, and the embedded electrode 300, the exposed electrode 100 and the embedded electrode 300 being disposed at upper and lower sides of the insulating dielectric 200, respectively.
Referring to fig. 1 and 3, the exposed electrode 100 includes an electrode handle 110 and electrode teeth 120, the electrode teeth 120 are uniformly distributed on one side of the electrode handle 110, in the embodiment, the electrode teeth 120 are densely distributed, and the exposed electrode 100 is comb-shaped. The electrode handle 110 is arranged on the insulating medium 200, the electrode teeth 120 are filament-shaped, and the electrode teeth 120 are made of flexible metal material, which can reciprocate the electrode teeth 120 with the electrode handle 110 as a rotation axis under the action of the air flow of the train body, so as to automatically change and adjust the orientation of the electrode teeth 120, and enable the plasma wind generated by the discharge of the exposed electrode 100 to be adapted to the running direction of the train. The end of the electrode teeth 120 away from the electrode shank 110 is a tip 121, which can effectively reduce the breakdown voltage on the surface of the insulating medium 200, greatly improve the discharge characteristics of the exposed electrode 100, and effectively enhance the airflow of the plasma airflow layer, thereby improving the drag reduction effect. In this embodiment, the electrode handle 110 is made of copper, and the electrode handle 110 made of copper has a good current receiving effect and high strength, so that the electrode teeth 120 can be fixed on the surface of a train, and the current can be uniformly conducted to the electrode teeth 120; the electrode teeth 120 are made of tungsten, and the tungsten wire is a high-temperature-resistant flexible metal material, which can more easily change its orientation with the airflow of the vehicle body. The insulating medium 200 is located on the surface of the vehicle body, and in this embodiment, a non-metallic material with good temperature resistance and insulating property is used, and preferably quartz glass.
Referring to fig. 1 and 2, the embedded electrode 300 is disposed on the insulating medium 200 and disposed at both sides of the electrode shank 110, respectively, and preferably, the embedded electrode 300 is partially embedded in the insulating medium 200. The embedded electrode 300 is spaced apart from the electrode shank 110 by a distance greater than the length of the electrode teeth 120, and the embedded electrode 300 is sealed inside the vehicle body. In the present embodiment, the embedded electrodes 300 are symmetrically disposed at both sides of the electrode shank 110, respectively. A high-frequency alternating-current high-voltage power supply is applied to the outside of the electrode handle 110, and the embedded electrode 300 is grounded; high frequency AC output high voltage U in the range of UL<U<UD(ii) a Wherein, ULA breakdown voltage corresponding to a distance L of the tip 121 of the electrode tooth 120 from the embedded electrode 300, wherein L ranges from 3mm to 5mm, UDThe breakdown voltage corresponds to the distance D of the electrode shank 110 from the embedded electrode 300. The high-frequency alternating current output high voltage U is greater than the breakdown voltage U corresponding to the electrode teethLAnd is less than the breakdown voltage U corresponding to the electrode handleDTherefore, only one side pointed by the electrode teeth discharges, and plasma wind along the direction of the air flow is generated. Preferably, the high frequency ac outputs a high voltage U,
. In the present embodiment, the embedded electrode 300 is made of copper, and the embedded electrode is made of copper material300 has good current receiving effect and high strength, and can rapidly generate plasma with the exposed electrode.
The air flow rates of the exposed electrode and the conventional electrode of the present invention were measured, and the results are shown in fig. 4. Wherein the X-axis face-to-face distance from the exposed electrode represents: distance along the surface of the medium from the exposed electrode tip
As can be seen from fig. 4, the gas flow rate of the exposed electrode of the present invention is much higher than that of the conventional electrode, and the gas flow rate of the exposed electrode of the present invention is improved by 35.6% from its maximum value, indicating that the performance of the exposed electrode of the present invention is much better than that of the conventional electrode. And the larger the air flow speed is, the more obvious the resistance reducing effect of the resistance reducing device is.
The installation position of the damping device is the outer surface of the top of the vehicle body, the damping device covers along the vehicle body area and is mainly concentrated at the position with larger shape change of the vehicle body.
The invention discloses a self-adaptive plasma drag reduction control method, which comprises the following steps:
(1) the self-adaptive plasma damping device is arranged on the outer side of the top of a train, wherein an embedded electrode is sealed in the train body, and an insulating medium and an exposed electrode are positioned on the outer surface of the train;
(2) applying a high-frequency alternating-current high-voltage power supply outside the electrode handle, and grounding the embedded electrode; high frequency AC output high voltage U in the range of UL<U<UD；
Wherein, ULBreakdown voltage corresponding to the distance L between the electrode teeth and the embedded electrode, UDThe breakdown voltage corresponds to the distance D of the electrode handle from the embedded electrode.
Further, in the preferred embodiment of the present invention, the high frequency ac output high voltage U,
。
the working principle and the process of the invention are as follows:
when the train runs to reach a certain speed per hour, the controller turns on the self-adaptive plasma drag reduction deviceThe high-frequency alternating current high-voltage power supply of the device applies high-frequency high-voltage alternating current between the exposed electrode 100 and the embedded electrode 300, the plasma drag reduction device starts to work, and the electrode teeth 120 in the exposed electrode 100 are made of thin-wire flexible metal materials, so when the running speed of a train reaches a certain value, high-speed airflow on the surface of a train body can drive the electrode teeth 120 of the exposed motor to rotate by taking the electrode handle 110 as a rotating shaft, and the orientation of the electrode teeth 120 is changed and the electrode teeth are arranged along the direction of the same airflow. The high-frequency alternating current output high voltage U is greater than the breakdown voltage U corresponding to the electrode teeth 120LAnd is less than the breakdown voltage U corresponding to the electrode handle 110DTherefore, only one side to which the electrode teeth 120 are directed is discharged, generating plasma wind in the direction of the air flow. When the train changes direction, the electrode teeth 120 in the exposed electrode 100 of the present fairing are carried to the other side by the high velocity gas flow and the direction of the plasma gas flow layer changes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. An adaptive plasma fairing, comprising: the electrode structure comprises an exposed electrode (100), an insulating medium (200) and an embedded electrode (300), wherein the exposed electrode (100) and the embedded electrode (300) are respectively arranged on the upper side and the lower side of the insulating medium (200);
the exposed electrode (100) comprises an electrode handle (110) and electrode teeth (120), wherein the electrode teeth (120) are filament-shaped and are uniformly distributed on one side of the electrode handle (110); the electrode handle (110) is arranged on the insulating medium (200), the electrode teeth (120) are made of flexible metal materials, and under the action of airflow of a train body, the electrode teeth (120) can reciprocate by taking the electrode handle (110) as a rotating shaft, so that the orientation of the electrode teeth (120) is automatically changed and adjusted, and plasma wind generated by discharge of the exposed electrode (100) is adapted to the running direction of a train;
the embedded electrodes (300) are arranged on the insulating medium (200) and are respectively arranged on two sides of the electrode handle (110), and the distance between the embedded electrodes (300) and the electrode handle (110) is greater than the length of the electrode teeth (120).
2. The adaptive plasma drag reducing device of claim 1, wherein the end of the electrode teeth (120) distal from the electrode shank (110) is a tip (121).
3. The adaptive plasma drag reducing device of claim 1, wherein the embedded electrodes (300) are symmetrically disposed on both sides of the electrode shank (110), respectively.
4. An adaptive plasma drag reducing device according to any of claims 1-3, characterized in that the material of the electrode shank (110) is copper.
5. The adaptive plasma drag reducing device of any of claims 1-3, wherein the material of the electrode teeth (120) is tungsten.
6. An adaptive plasma drag reducing device according to any of claims 1-3, characterized in that the material of the embedded electrode (300) is copper.
7. An adaptive plasma drag reduction control method using the adaptive plasma drag reduction device according to any one of claims 1 to 6, comprising
(1) The self-adaptive plasma damping device is arranged on the outer side of the top of a train, wherein an embedded electrode is sealed in the train body, and an insulating medium and an exposed electrode are positioned on the outer surface of the train;
(2) a high-frequency alternating-current high-voltage power supply is applied outside the electrode handle, andgrounding the embedded electrode; the high-frequency alternating current output high voltage U of the high-frequency alternating current high voltage power supply output is in the range of UL<U<UD；
Wherein, ULBreakdown voltage corresponding to the distance L from the tip of the electrode tooth to the embedded electrodeDThe breakdown voltage corresponds to the distance D of the electrode shank from the embedded electrode.
8. The adaptive plasma drag reduction control method of claim 7 in which the high frequency AC outputs a high voltage 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110126860A CN110126860A (en) | 2019-08-16 |
| CN110126860B true CN110126860B (en) | 2020-07-21 |
Family
ID=67582580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910454380.9A Active CN110126860B (en) | 2019-05-29 | 2019-05-29 | Self-adaptive plasma resistance reducing device and resistance reducing control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110126860B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5498384B2 (en) * | 2008-07-17 | 2014-05-21 | 株式会社東芝 | Airflow generator and manufacturing method thereof |
| EP2884823B3 (en) * | 2012-08-08 | 2019-03-06 | National Institute of Advanced Industrial Science and Technology | Surface plasma actuator |
| CN103287575B (en) * | 2013-06-07 | 2016-01-13 | 上海交通大学 | Based on the method for the minimizing skin resistance that plasma exciter realizes |
| JP2016140857A (en) * | 2015-02-05 | 2016-08-08 | 株式会社東芝 | Airflow generation device |
| CN109501824B (en) * | 2018-12-28 | 2019-12-31 | 西南交通大学 | High-speed train drag reduction method and device based on plasma |
-
2019
- 2019-05-29 CN CN201910454380.9A patent/CN110126860B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110126860A (en) | 2019-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2347637B1 (en) | Disbanded cascaded array for generating and moving plasma clusters for active airflow control and method thereof | |
| CN102887223B (en) | Method of controlling plasma circular rector for wing with sharp trailing edge | |
| CN103287575B (en) | Based on the method for the minimizing skin resistance that plasma exciter realizes | |
| CN110126860B (en) | Self-adaptive plasma resistance reducing device and resistance reducing control method | |
| CN107089238A (en) | A kind of bullet train energy-conservation drag reduction method and device | |
| CN110131072A (en) | Combined type plasma flow control device and its regulation air intake duct shock wave/boundary-layer Interference Flow separation method | |
| CN109501824B (en) | High-speed train drag reduction method and device based on plasma | |
| CN204887661U (en) | Insulating medium's plasma driver device is regarded as with pottery | |
| CN205744542U (en) | A kind of low-noise axial flow fan for cooling air conditioner | |
| CN112139635A (en) | Tungsten electrode adjustable bidirectional filler wire GTAW constrained arc additive manufacturing device and method | |
| CN202524630U (en) | Static electricity eliminator | |
| CN103072587B (en) | A kind of outer wind shield for vehicle | |
| CN106564588B (en) | Unmanned helicopter blade and unmanned helicopter | |
| CN107458613A (en) | Aircraft | |
| CN212454992U (en) | Fan cover of radial fan | |
| CN210075673U (en) | Novel dielectric barrier discharge plasma exciter | |
| CN206064633U (en) | A kind of electrostatic precipitator and its cathod system | |
| CN208489738U (en) | A kind of cooling device for motor in electric automobile | |
| CN209700792U (en) | A kind of pneumatic noise reduction automobile A column device based on active vortex control | |
| CN113109107B (en) | Enrichment device of aerosol particles | |
| CN203956087U (en) | For the preparation of the LASER HEATING rotary-atomizing equipment of metal or alloy powder | |
| CN104564805B (en) | Machine in a kind of blade structure of centrifugal blower, centrifugal blower and embedded type air conditioner | |
| CN209414253U (en) | Determine impeller, motor and dust catcher | |
| CN204978562U (en) | Automobile windshield wiper | |
| CN207292168U (en) | A kind of vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |