CN107089238A - A kind of bullet train energy-conservation drag reduction method and device - Google Patents
A kind of bullet train energy-conservation drag reduction method and device Download PDFInfo
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- CN107089238A CN107089238A CN201710179539.1A CN201710179539A CN107089238A CN 107089238 A CN107089238 A CN 107089238A CN 201710179539 A CN201710179539 A CN 201710179539A CN 107089238 A CN107089238 A CN 107089238A
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- bullet train
- electrode
- train
- generating means
- induced draft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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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
Abstract
The invention discloses a kind of bullet train energy-conservation drag reduction method and device, induced draft change changes the layering situation of flow boundary layer air and reduces headstock windage on headstock windward side.By the change of input voltage with control plasma generator produce induced draft velocity magnitude, plasma generator is adjusted simultaneously, change geometry and the position of its electrode, adjustment produces speed and the direction of induced draft, and acquisition can reach the induced draft needed for the optimal drag reduction of bullet train；Plasma generator two ends are connected with measurement of electric parameter device, and power amplifier switches IGCT is triggered by digital delay generator, and pressure monitor system is connected with PC ends.The present invention can effectively reduce aerodynamic drag suffered during bullet train is travelled, and realize energy-conservation and the purpose of raising operation safety.
Description
Technical field
The invention belongs to electric railway technical field, the bullet train energy-conservation drag reduction method and device being related to.
Background technology
Bullet train is so that its speed of service is fast, handling capacity of passengers is high, conveying capacity is big, security reliability is high, percent of punctuality is high, comfortable
It is convenient, energy resource consumption is low, ambient influnence is light, the advantage such as good in economic efficiency, meeting the requirement of socio-economic development today, (train is empty
Aerodynamics, China Railway Press, 2007, field red flag；).Train ground proximity is run, and draw ratio is much larger than other traffic works
Tool, air drag distribution character is more increasingly complex compared with automobile, truck or aircraft.The aerodynamic resistance properties of train are related to row
The speed-raising of car and the energy-conserving and environment-protective ability of train.
With the raising of the speed of service of train, the close phase of aeroperformance and weight of train running resistance mainly with train
Close, due to square growth of the aerodynamic drag with train running speed, required power causes reduction at a high speed with cube growth of speed
Energy consumption in train journey focuses primarily upon pneumatic drag reduction technology and lightweight (research of bullet train aerodynamic drag distribution character, railway
Journal, 2012, Yao fastens treasured, Guo Dilong, Yang Guowei；).China's Harmony EMUs are attempted a variety of in overall drag reduction design optimization
Method, but its energy-conservation room for promotion is still huge, under conditions of ensureing that bullet train free space is constant, is sent out using plasma
Raw exciting bank can effectively realize the energy-conservation drag reduction of bullet train to the active control of air-flow.
In addition, safe operation of the aerodynamic lift to train also result in material impact, train is by lift straight up
Reduce the normal pressure between wheel and rail.Due to square being directly proportional for lift and speed, when train is in high-speed cruising, it is grasped
Making performance will reduce, and deteriorate riding comfort.Security is the decisive indicator of High-sped Trains development, is utilized
Gas ions carry out active control to air-flow contributes to the steady of bullet train and operation.
The content of the invention
Deficiency and defect for more than, it is an object of the invention to provide a kind of bullet train energy-conservation drag reduction method and
Device, further reduces bullet train aerodynamic drag suffered in the process of moving.
To achieve the above objectives, the technical scheme is that：
A kind of bullet train saves drag reduction method, and induced draft change changes point of flow boundary layer air on headstock windward side
Layer status and reduce headstock windage；There is provided after driving voltage, used using excitation power supply generating means article on plasma generating means
Digital delay generator synchronously triggering excitation power supply generating means switch motion, suppresses bullet train air-flow side in the process of running
Interlayer segregation phenomenon, reduces aerodynamic drag suffered during bullet train is travelled, and improves its aerodynamic characteristic, including following main
Step：
1) in bullet train actual operating mode, monitor and feed back suffered by bullet train in real time by pressure monitor system
Air drag situation is simultaneously inputted to the progress judgement contrast of PC client databases, judges that train flow boundary layer air separates situation；
2) if comparing result shows boundary layer flow separation, start plasma producing apparatus；According to pressure monitoring system
The big minor adjustment input voltage of aerodynamic drag and electrode position and geometry suffered by system feedback bullet train；
3) excitation power supply generating means is adjusted, is induced by the change of input voltage with controlling plasma generator to produce
The velocity magnitude of air-flow；Plasma generator is adjusted simultaneously, changes geometry and the position of its electrode, and adjustment produces induction
The speed of air-flow and direction, acquisition can reach the induced draft needed for the optimal drag reduction of bullet train；
4) aerodynamic drag situation suffered by pressure monitor system Real-time Feedback train is to PC ends comparator multilevel iudge, with air-flow
Boundary layer is not produced at high speeds for control targe, so as to reach the optimal drag-reduction effect of bullet train.
There is provided the present invention also aims to the implementation for as above method and realize device, its Main Means is：
A kind of bullet train saves damping device, including excitation power supply generating means 1, plasma producing apparatus 2, electrically
Parameter measuring apparatus 3, digital delay generator 4 and pressure monitor system 5.
Wherein, pressure monitor system 5 is connected to PC ends, monitors in real time and feeds back sky suffered in bullet train running
Atmidometer size；Excitation power supply generating means is made up of signal generator, power amplifier and step-up transformer, signal generator
Powered by vehicle power；Output voltage after boosted transformer is powered to plasma generator 2；Plasma generator 2
By being placed in the exposure electrode 201 in the outside of headstock windward side dielectric 203, being placed in the inner side of headstock windward side dielectric 203
Encapsulated electrode 202 is constituted；Excitation power supply generating means is triggered by digital delay generator 4；Digital delay generator 4 is exported
Signal is used as the time reference signal of trigger action in digital PC all the way.
The bare electrode 201 and encapsulated electrode 202 are spaced by dielectric 20, and electrode 201 and encapsulated electrode 202 can be put down
Row is set, and can also be set in certain angle of cut.
Further, the bare electrode 201 and encapsulated electrode 202 can have following geometry：Line style, triangle
Type, square type and curved.
In bullet train actual operating mode, monitored in real time by pressure monitor system and feed back air suffered by bullet train
The size of resistance is contrasted with PC client databases, judges that train flow boundary layer air separates situation；If comparing result shows boundary layer flow
Dynamic separation causes aerodynamic drag suffered by bullet train to greatly increase, then starts plasma producing apparatus；Adjust excitation power supply hair
Generating apparatus, by the change of input voltage with control plasma generator produce induced draft velocity magnitude.Regulation etc. from
Sub- generating means, changes its electrode position and geometry, and adjustment produces speed and the direction of induced draft；Pass through pressure monitoring
The size selection excitation condition and electrode structure of aerodynamic drag suffered by system monitoring in real time and feedback train, to reach bullet train
Optimal drag-reduction effect simultaneously records plasma device electric parameter data under different operating modes.
Compared with prior art, the present invention has following beneficial technique effect：
A kind of bullet train energy-conservation drag reduction method and device that the present invention is provided, by plasma generator to air-flow
The active control in boundary layer, and suitable driving voltage and electrode position and structure are selected, it can effectively reduce bullet train row
Suffered aerodynamic drag during sailing, improves the aerodynamic characteristic in train travelling process, realizes energy-conservation with improving operation safety
Purpose.In addition, recording driving voltage and current waveform using electrical measuring device in the present invention, and produce induced draft speed
Degree, is conducive to deeply comprehensively understanding bullet train drag reduction process and providing scientific basis and Technical Reference.
Brief description of the drawings
Fig. 1 is that the bullet train of the present invention saves the schematic flow sheet of drag reduction method；
Fig. 2 is that the bullet train of the present invention saves the structural representation of damping device；
Fig. 3 is that plasma generator places structure chart on motor-car with pressure monitor system；
The partial enlarged drawing of Fig. 4 plasma generators, wherein, figure (a) bare electrode 201 and encapsulated electrode 202 are submitted
Angle；(b) bare electrode 201 is schemed with encapsulated electrode 202 in parallel.
What Fig. 5 was that (a) represent in electrode structure of different shapes, figure is linear structure；What (b) was represented in figure is triangular form
Structure；What (c) was represented in figure is square type structure；What (d) was represented in figure is curved structure；
Fig. 6 is active control schematic diagram of the plasma generator to air-flow, and figure (a) represents that plasma generator is closed,
Figure (b) represents that plasma generator is opened；
In figure, 1 is excitation power supply generating means, and 2 be plasma generator, and 3 be measurement of electric parameter device, and 4 be number
Word delay generator, 5 be pressure monitor system.
Embodiment
With reference to specific example, the present invention is described in further detail, it is described be explanation of the invention without
It is to limit.
Referring to Fig. 1, a kind of bullet train saves damping device, including：Excitation power supply generating means, plasma are filled
Put, measurement of electric parameter device, digital delay generator and pressure monitor system；Wherein, believe in excitation power supply generating means
Number generator is connected with power amplifier, and power amplifier is connected with step-up transformer；Step-up transformer two ends and plasma hair
Generating apparatus is connected；Plasma generator is connected with measurement of electric parameter device；Pressure monitor system is connected with PC ends.
Excitation power supply generating means Switched Thyristors are all triggered by digital delay generator；In addition, digital delay is sent out
Signal, in PC, is used as the time reference signal of trigger action all the way for raw device output.
Specifically, described excitation power supply generating means is made up of signal generator, power amplifier and step-up transformer,
Discharge loop can produce amplitude 1kV~100kV, frequency range 1kHz~100kHz output voltage.
Described plasma generator is made up of bare electrode, encapsulated electrode and dielectric, and electrode has different positions
Put and a variety of different geometries.Measurement of electric parameter device Rogowski coil, PC compositions.
The bullet train energy-conservation drag reduction method that the present invention is provided, the induced draft produced using plasma generator is to gas
The active control of stream, makes flow boundary layer air fit.Comprise the following steps：
1) in bullet train actual operating mode, monitored in real time by pressure monitor system and feed back empty suffered by bullet train
The size of atmidometer is contrasted with PC client databases, judges that train flow boundary layer air separates situation；
2) if comparing result shows that boundary layer flow separation causes aerodynamic drag suffered by bullet train to greatly increase, start
Plasma producing apparatus；
3) excitation power supply generating means is adjusted, is induced by the change of input voltage with controlling plasma generator to produce
The velocity magnitude of air-flow.
4) plasma generator is adjusted, changes its electrode position and geometry, adjustment produces the speed of induced draft
And direction；
5) monitored in real time by pressure monitor system and feed back aerodynamic drag suffered by train size selection excitation condition and
Electrode structure, to reach the optimal drag-reduction effect of bullet train；
There is provided using excitation power supply generating means article on plasma generating means after driving voltage, it is anti-according to pressure monitor system
The big minor adjustment input voltage of aerodynamic drag and electrode position and geometry suffered by bullet train are presented, generation can reach at a high speed
Induced draft needed for the optimal drag reduction of train；Using digital delay generator, synchronously triggering excitation power supply generating means switch is dynamic
Make, suppress bullet train flow boundary layer air segregation phenomenon in the process of running, reduce gas suffered during bullet train is travelled
Dynamic resistance, improves its aerodynamic characteristic.While electric parameter device writing circuit electric current.
The present invention the course of work be：
Connection circuit, and electrical measuring device as shown in Figure 2.Rogowski coil signal output part connects PC.IGCT is defeated
Enter end connection digital delay generator.In addition signal is used as time reference signal in PC all the way for digital delay generator output.Such as
In pressure monitor system shown in Fig. 3, bullet train is travelled in different sections at different rates, real according to pressure monitor system
When monitor and feedback bullet train suffered by air drag size, separate feelings with PC client database multilevel iudge boundary layer flows
Condition, chooses whether to start plasma producing apparatus.When plasma producing apparatus is enabled, excitation power supply generating means is adjusted
Control its output voltage and change setting position, and then adjust the speed and size of induced draft, it is real by pressure monitor system
When the air drag size fed back select optimal drag reduction driving voltage.As shown in Figure 4 bare electrode 201 and encapsulated electrode 202 by
Dielectric 20 is spaced, and electrode 201 and encapsulated electrode 202 can be arranged in parallel, can also be set in certain angle of cut.
According to different automobile types and different running sections, different electrode structures can be selected as schemed shown in (5), electrode structure
There is line style, triangular form, square type is curved.
In bullet train actual operating mode, monitored in real time by pressure monitor system and feed back air suffered by bullet train
The size of resistance is contrasted with PC client databases, judges that train flow boundary layer air separates situation；If comparing result shows boundary layer flow
Dynamic separation causes aerodynamic drag suffered by bullet train to greatly increase, then starts plasma producing apparatus；Adjust excitation power supply hair
Generating apparatus, by the change of input voltage with control plasma generator produce induced draft velocity magnitude.Regulation etc. from
Sub- generating means, changes its electrode position and geometry, and adjustment produces speed and the direction of induced draft；Pass through pressure monitoring
The size selection excitation condition and electrode structure of aerodynamic drag suffered by system monitoring in real time and feedback train, to reach bullet train
Optimal drag-reduction effect simultaneously records plasma device electric parameter data under different operating modes.
As described above, this method is run over based on control ability of the plasma to boundary layer airflow with reference to bullet train
Aerodynamic characteristic in journey, can reduce the aerodynamic drag suffered by bullet train traveling process, improve its aerodynamic characteristic, realize energy-conservation
Purpose with improving operation safety.The drag reduction that the present invention is applied to but is not limited to during bullet train traveling, can also be applied
In other similar mobile devices tests.
Claims (4)
1. a kind of bullet train saves drag reduction method, induced draft change changes the layering of flow boundary layer air on headstock windward side
Situation and reduce headstock windage；There is provided using excitation power supply generating means article on plasma generating means after driving voltage, use number
The synchronously triggering excitation power supply generating means switch motion of word delay generator, suppresses bullet train air-flow border in the process of running
Layer segregation phenomenon, reduces aerodynamic drag suffered during bullet train is travelled, improves its aerodynamic characteristic, including following main step
Suddenly：
1) in bullet train actual operating mode, monitored in real time by pressure monitor system and feed back air suffered by bullet train
Resistance situation is simultaneously inputted to the progress judgement contrast of PC client databases, judges that train flow boundary layer air separates situation；
2) if comparing result shows boundary layer flow separation, start plasma producing apparatus；It is anti-according to pressure monitor system
Present the big minor adjustment input voltage of aerodynamic drag and electrode position and geometry suffered by bullet train；
3) adjust excitation power supply generating means, by the change of input voltage with control plasma generator produce induced draft
Velocity magnitude；Plasma generator is adjusted simultaneously, changes geometry and the position of its electrode, and adjustment produces induced draft
Speed and direction, acquisition can reach the induced draft needed for the optimal drag reduction of bullet train；
4) aerodynamic drag situation suffered by pressure monitor system Real-time Feedback train is to PC ends comparator multilevel iudge, with air-flow in height
Boundary layer is not produced under fast state for control targe, so as to reach the optimal drag-reduction effect of bullet train.
2. a kind of bullet train energy-conservation damping device for realizing claim 1 methods described, it is characterised in that including excitation power supply
Generating means (1), plasma producing apparatus (2), measurement of electric parameter device (3), digital delay generator (4) and pressure
Power monitoring system (5)；
Wherein, pressure monitor system (5) is connected to PC ends, monitors in real time and feeds back air suffered in bullet train running
Drag size；Excitation power supply generating means is made up of signal generator, power amplifier and step-up transformer, signal generator by
Vehicle power is powered；Output voltage after boosted transformer is powered to plasma generator (2)；Plasma generator
(2) by being placed in exposure electrode (201) on the outside of headstock windward side dielectric (203), being placed in headstock windward side dielectric
(203) encapsulated electrode (202) on the inside of is constituted；Excitation power supply generating means is triggered by digital delay generator (4)；Numeral
Signal, in digital PC, is used as the time reference signal of trigger action all the way for delay generator (4) output.
3. bullet train as claimed in claim 2 saves damping device, it is characterised in that the bare electrode (201) and envelope
Loading electrode (202) is spaced by dielectric (203), and bare electrode (201) and encapsulated electrode (202) can be arranged in parallel, can also
Set in certain angle of cut.
4. as described in claim 2 and 3 bullet train energy-conservation damping device, it is characterised in that the bare electrode (201) and
Encapsulated electrode (202) can have following geometry：Line style, triangular form, square type and curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179539.1A CN107089238B (en) | 2017-03-23 | 2017-03-23 | Energy-saving and resistance-reducing method and device for high-speed train |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179539.1A CN107089238B (en) | 2017-03-23 | 2017-03-23 | Energy-saving and resistance-reducing method and device for high-speed train |
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| Publication Number | Publication Date |
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| CN107089238A true CN107089238A (en) | 2017-08-25 |
| CN107089238B CN107089238B (en) | 2020-04-24 |
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| CN201710179539.1A Expired - Fee Related CN107089238B (en) | 2017-03-23 | 2017-03-23 | Energy-saving and resistance-reducing method and device for high-speed train |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109466643A (en) * | 2018-12-28 | 2019-03-15 | 西南交通大学 | A kind of automobile resistance-reducing System and method for based on active Flow Control |
| CN109501821A (en) * | 2018-12-27 | 2019-03-22 | 西南交通大学 | A kind of bullet train noise reduction system and method based on plasma flow control |
| 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 |
| CN109657342A (en) * | 2018-12-17 | 2019-04-19 | 西南交通大学 | A kind of bullet train light-weight design method based on power demand |
| CN109697971A (en) * | 2018-12-28 | 2019-04-30 | 西南交通大学 | A kind of automobile noise reduction system and method based on plasma |
| CN109968987A (en) * | 2019-03-25 | 2019-07-05 | 中车青岛四方机车车辆股份有限公司 | High-speed train pantograph and its noise-reduction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109697971B (en) * | 2018-12-28 | 2021-04-13 | 西南交通大学 | Plasma-based automobile noise reduction system and method |
| CN109968987A (en) * | 2019-03-25 | 2019-07-05 | 中车青岛四方机车车辆股份有限公司 | High-speed train pantograph and its noise-reduction method |
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