CN105089925A - Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade - Google Patents
Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade Download PDFInfo
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- CN105089925A CN105089925A CN201510585444.0A CN201510585444A CN105089925A CN 105089925 A CN105089925 A CN 105089925A CN 201510585444 A CN201510585444 A CN 201510585444A CN 105089925 A CN105089925 A CN 105089925A
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- bionical
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a flexible bionic feather band for lift augmentation and noise reduction of a tail edge and a blade tip of a wind turbine blade. A laminated flexible bionic feather band applied to lift augmentation and noise reduction of a tail edge and a blade tip of a traditional wind turbine blade is designed by using control mechanisms of eagles to blade tip vortexes, fall vortexes and wakes in high-speed flight through wings; the flexible bionic feather band is manufactured by a light flexible material; one end is fixed at the tail part and the blade tip part of the wind turbine blade, and the other end can generate flexible deformation under the effect of pressure difference between the tail part of a wind turbine and two sides of the blade tip part; bionic feathers in the flexible bionic feather band are arranged in a laminated manner; the later bionic feathers are pressed on one parts of the previous bionic feathers; small gaps are formed between the adjacent bionic feathers; and the bionic feathers consist of flexible bearing brackets and close flexible simulated feather filaments. The flexible bionic feather band can effectively increase the lift of the wind turbine blade, so that the strength of the blade tip vortexes and the drop vortexes is weakened, the turbulence energy in the wakes is reduced, and the noise level of the wind turbine is lowered.
Description
Technical field
The invention belongs to field of wind energy utilization, is a kind of structure being improved blade lift reduction noise by bionics techniques control leaf abscission whirlpool, tail and tip vortex.
Technical background
Wind energy conversion system is the mechanical device of electric energy by wind energy transformation.Compared with other clean energy technologies, wind power technology is mature and reliable more, and therefore wind energy is also considered to the clean energy resource that 21 century most possibly substitutes fossil energy.But still there is the technical problem of some local in wind energy conversion system, such as there is tip vortex at vane tip, the generation of tip vortex reduces the lift of leaf top regional area, and the trailing edge place of leaf exhibition most areas produces Shedding Vortex and tail, and these vorticitys are also the main sources of wind energy conversion system noise.Adopt which kind of mode to reduce Axis Wind Turbine With A Tip Vane vortices breakdown, reduce the intensity of leaf abscission whirlpool and tail, reach and not damage or less infringement blade lift can reduce again the noise level of wind energy conversion system? this is the problem that the researcher of all wind energy conversion system industries is concerned about.
Prior art roughly has three kinds of solutions: the vibrational energy that 1, US7901189 and US8043066 patent proposes to adopt the damping flexible material of porous to absorb blade surface, blade tip and trailing edge reduces noise; 2, the mode that EP1886016A1, US8038396, US8157532 patent adopts blade suction surface wall to lay difform vortex generator promotes that turning of boundary layer is twisted, and control separation reduces the intensity of Shedding Vortex and tail and then reduces noise level; 3, CN102465827 patent proposes to have employed sawtooth and bristle arrangements, US7976276 and US8083488 patent proposes to adopt saw tooth structure to substitute traditional trailing edge of blade.First kind scheme can play the effect reducing noise to a certain extent, but does not have obvious improvement to the lift performance of blade; Although Equations of The Second Kind scheme reduces noise, add the loss of blade suction surface boundary layer, the intensity of tail can increase to some extent; The sawtooth being close to trailing edge portion in 3rd class scheme has certain effect at reduction Shedding Vortex and tail intensity, mainly plays the effect of noise reduction, increases the DeGrain of lift, and the intensity of tip vortex can not adopt the method improvement to be suppressed.
Summary of the invention
In order to solve the reduction tip vortex intensity that wind energy conversion system industry exists better, reduce the intensity of leaf abscission whirlpool and tail and then reduce a difficult problem for noise level, the hawk assistant rear end feather that this invention has investigated high airflight controls Shedding Vortex and tail, with the behavior of the control wingtip vortex of assistant tip, the noise level that Eagle Flight is capable produced is extremely low, the mechanism using the feather of wing rear portion and tip to control flowing from hawk proposes to suppress Axis Wind Turbine With A Tip Vane whirlpool, reduce the effective ways of the intensity of leaf abscission whirlpool and tail, meanwhile reduce the aerodynamic noise grade of wind energy conversion system.Specifically, this invention adopts following technical proposals promote the lift of pneumatic equipment blades made and reduce the noise level of wind energy conversion system:
The flexible bionic feather band of pneumatic equipment blades made trailing edge of the present invention and blade tip lift-rising noise reduction, made by light flexible material, afterbody and the leaf tip of pneumatic equipment blades made are fixed in its one end, and the other end by under the effect of wind energy conversion system afterbody and leaf tip pressure at both sides difference, plastic deformation can occur.Wherein, bionical feather in flexible bionic feather band is layered laminate arrangement, the bionical feather of rear a slice is pressed in the part of the bionical feather of front a slice, fine gap is there is between adjacent bionical feather, bionical feather is can with the change do plastic deformation among a small circle of pressure at both sides difference, the pressure side of wind energy conversion system and the boundary layer fluid of suction surface can pass rear formation tail from the gap of adjacent bionical feather stacked together, also can flow through along the outer surface of bionical feather band entirety, come off after converging inside the gap of the sawtooth of flexible bionic feather band formation formation tail, wind energy conversion system wing tip pressure side fluid can pass rear formation tail from the gap of adjacent bionical feather stacked together, also after can flowing through along the outer surface of bionical feather band entirety, the gap walking around the sawtooth that flexible bionic feather band is formed again forms tip vortex.
The bearing bracket of the flexible bionic feather band that leaf tip connects is flexible, be positioned on the profile line windward of bionical feather, bionical feather face exists the fine and closely woven bionical plumage silk of inclination, Axis Wind Turbine With A Tip Vane portion can be fixed on by flexible faciola, also directly can be fixed on the leaf tip of wind energy conversion system.
The bearing bracket of the flexible bionic feather band that afterbody connects also is flexible, be positioned on the Axisymmetric Distributed Line of profile line windward of bionical feather, bionical feather face exists the fine and closely woven bionical plumage silk of inclination, be 30 ° of angles as preferred fine and closely woven bionical plumage silk and bearing bracket, bionical feather can be fixed on wind energy conversion system afterbody by flexible faciola, also can directly be fixed on wind energy conversion system afterbody.
This invention utilizes hawk by the controlling mechanism of assistant when high-speed flight to tip vortex, Shedding Vortex and tail, devises the flexible bionic feather band of layered laminate trailing edge and the blade tip lift-rising noise reduction that can be applicable to existing pneumatic equipment blades made.The flexible bionic feather band that leaf tip connects extends the action time of streaming gas with blade tip pressure side by plastic deformation, flexible bionic feather band can produce lift, and provide stream air-flow from the stacked gap of bionical feather, bionical feather leaf top saw tooth space, walk around bionical feather point three kinds of modes pass through, greatly weaken tip vortex, effectively can improve conventional wind machine blade and bring because producing the tip vortex of higher-strength the problem that Ye Ding region lift declines.The flexible bionic feather band that afterbody connects extends the action time of opening up pressure side boundary layer gas with leaf by plastic deformation, intercept original trailing edge place to flow to suction surface Shedding Vortex by pressure side and formed, for boundary layer gas provide from the stacked gap of bionical feather, bionical feather leaf top saw tooth space, walk around bionical feather point three kinds of pass-through modes, greatly weaken Shedding Vortex, improve the lift of leaf exhibition afterbody.The have boundary layer gas of fine and closely woven plumage silk to the blade tip and afterbody that flow through its surface on bionical feather band surface has carried out combing, reduce the tubulence energy in tail, reduce the noise level of tail, again in conjunction with the bionical feather band of blade tip and afterbody to the weakening of tip vortex, Shedding Vortex intensity, finally reduce the noise level of wind energy conversion system on the whole.
The present invention can reach following effect:
Adopt the flexible bionic feather band of pneumatic equipment blades made trailing edge and blade tip lift-rising noise reduction, the lift of Axis Wind Turbine With A Tip Vane, afterbody can be improved, weaken the intensity of tip vortex and Shedding Vortex, reduce the tubulence energy in tail, reduce the noise level of wind energy conversion system entirety.
Above-mentioned explanation is the general introduction of the present invention program, in order to can clearer understanding technological means of the present invention, and can be implemented according to the content of specification.Provide the specific embodiment of the present invention and accompanying drawing thereof in detail below.
Accompanying drawing explanation
Fig. 1 is the partial enlarged drawing of appearance profile schematic diagram of the present invention and blade tip flexible bionic feather band, afterbody flexible bionic feather band
Fig. 2 is schematic partial cross-sectional view of the present invention
Fig. 3 is the flexible bionic feather strucutre schematic diagram of blade tip of the present invention
Fig. 4 is the flexible bionic feather strucutre schematic diagram of afterbody of the present invention
In figure: 1, pneumatic equipment blades made; 2, blade tip flexible bionic feather band; 3, afterbody flexible bionic feather band; 4, flexible faciola; 5, the bearing bracket of blade tip flexible bionic feather; 6, the bionical plumage silk of blade tip flexible bionic feather; 7, the non-bearing profile of blade tip flexible bionic feather; 8, the bearing bracket of afterbody flexible bionic feather; 9, the bionical plumage silk of afterbody flexible bionic feather; 10, the non-bearing profile of afterbody flexible bionic feather.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention, structure, feature and effect thereof are described in detail:
At the leaf tip of pneumatic equipment blades made 1 and tail region, blade tip flexible bionic feather band 2, afterbody flexible bionic feather band 3 are installed respectively, make blade tip flexible bionic feather band 2, one end of afterbody flexible bionic feather band 3 is fixed on leaf tip and the afterbody of pneumatic equipment blades made 1, can see Fig. 1 and Fig. 2, above-mentioned pneumatic equipment blades made comprises horizontal axis and blade of vertical axis wind turbine.
Above-mentioned blade tip flexible bionic feather band 2, afterbody flexible bionic feather band 3 can be connected with pneumatic equipment blades made 1 by flexible faciola 4, also directly can be connected with pneumatic equipment blades made 1, be connected by flexible faciola 4 pneumatic equipment blades made 1 as preferred blade tip flexible bionic feather band 2, afterbody flexible bionic feather band 3.
Bionical feather in above-mentioned bionical feather band is layered laminate arrangement, made by light flexible material, the bionical feather of rear a slice is pressed in the part of the bionical feather of front a slice, there is fine gap between adjacent bionical feather, bionical feather is can with the change do plastic deformation among a small circle of pressure at both sides difference.
Bionical feather in bionical feather band is made up of flexible bearing bracket and bionical plumage silk, see Fig. 3 and Fig. 4, blade tip flexible bionic feather band 2 comprises the bearing bracket 5 of blade tip flexible bionic feather, the bionical plumage silk 6 of blade tip flexible bionic feather, and afterbody flexible bionic feather band 3 comprises the bearing bracket 8 of afterbody flexible bionic feather, the bionical plumage silk 9 of afterbody flexible bionic feather.
Above-mentioned bionical plumage silk is very fine and closely woven, for flexible material, one end of the bionical plumage silk 6 of blade tip flexible bionic feather is connected to the bearing bracket 5 of blade tip flexible bionic feather, the other end of the bionical plumage silk 6 of blade tip flexible bionic feather is free end, which constitute the non-bearing profile 7 of blade tip flexible bionic feather, one end of the bionical plumage silk 9 of afterbody flexible bionic feather is connected to the bearing bracket 8 of afterbody flexible bionic feather, the bionical plumage silk 9 of afterbody flexible bionic feather the other end be free end, which constitute the non-bearing profile 10 of afterbody flexible bionic feather, the bearing bracket 8 of afterbody flexible bionic feather is on the Axisymmetric Distributed Line of afterbody flexible bionic feather.
Technological scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, the technology distortion that every technological scheme according to the present invention is made, and all falls within protection scope of the present invention.
Claims (5)
1. a flexible bionic feather band for pneumatic equipment blades made trailing edge and blade tip lift-rising noise reduction, is characterized in that it is made up of the bionical feather band that plastic deformation can occur under the effect of wind energy conversion system two sides of tail pressure difference be connected with the afterbody of pneumatic equipment blades made and the bionical feather band that plastic deformation can occur under the effect of Axis Wind Turbine With A Tip Vane pressure at both sides difference be connected with the leaf tip of pneumatic equipment blades made.
2. the flexible bionic feather band of pneumatic equipment blades made trailing edge according to claim 1 and blade tip lift-rising noise reduction, it is characterized in that the bionical feather in its flexible bionic feather band connected is layered laminate arrangement, the bionical feather of rear a slice is pressed in the part of the bionical feather of front a slice, and bionical feather band is light flexible material.
3. the flexible bionic feather band of leaf tip connection according to claim 1, it is characterized in that its bearing bracket is flexible, be positioned on the profile line windward of bionical feather, bionical feather face exists the fine and closely woven bionical plumage silk of inclination, Axis Wind Turbine With A Tip Vane portion can be fixed on by flexible faciola, also directly can be fixed on the leaf tip of wind energy conversion system.
4. the flexible bionic feather band of afterbody connection according to claim 1, it is characterized in that its bearing bracket is flexible, be positioned on the Axisymmetric Distributed Line of profile line windward of bionical feather, bionical feather face exists the fine and closely woven bionical plumage silk of inclination, be 30 ° of angles as preferred fine and closely woven bionical plumage silk and bearing bracket, bionical feather can be fixed on wind energy conversion system afterbody by flexible faciola, also can directly be fixed on wind energy conversion system afterbody.
5. flexible bionic feather band according to claim 1, it is characterized in that between stacked bionical feather be apertured, bionical feather is can with the change do plastic deformation among a small circle of pressure at both sides difference, the pressure side of wind energy conversion system and the boundary layer fluid of suction surface can pass rear formation tail from the gap of adjacent bionical feather stacked together, also can flow through along the outer surface of bionical feather band entirety, come off after converging inside the gap of the sawtooth of flexible bionic feather band formation formation tail, wind energy conversion system wing tip pressure side fluid can pass rear formation tail from the gap of adjacent bionical feather stacked together, also after can flowing through along the outer surface of bionical feather band entirety, the gap walking around the sawtooth that flexible bionic feather band is formed again forms tip vortex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585444.0A CN105089925A (en) | 2015-09-15 | 2015-09-15 | Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585444.0A CN105089925A (en) | 2015-09-15 | 2015-09-15 | Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade |
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| CN105089925A true CN105089925A (en) | 2015-11-25 |
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| CN201510585444.0A Pending CN105089925A (en) | 2015-09-15 | 2015-09-15 | Flexible bionic feather band for lift augmentation and noise reduction of tail edge and blade tip of wind turbine blade |
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Cited By (9)
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| CN106050556A (en) * | 2016-08-15 | 2016-10-26 | 上海理工大学 | Self-adaptive flexible blade of vertical-shaft wind turbine |
| CN106351789A (en) * | 2016-10-17 | 2017-01-25 | 上海理工大学 | Bird wing-based bionic horizontal axis wind turbine blade |
| CN107023370A (en) * | 2017-06-08 | 2017-08-08 | 吉林大学 | A kind of bionical texture tailpipe of the rectangle of tractor |
| CN107044331A (en) * | 2017-06-07 | 2017-08-15 | 吉林大学 | A kind of composite bionic texture tailpipe of tractor |
| CN108280259A (en) * | 2017-12-25 | 2018-07-13 | 明阳智慧能源集团股份公司 | A kind of wind electricity blade vortex generator installation site and its method for determining dimension |
| CN109281866A (en) * | 2018-12-07 | 2019-01-29 | 泰州市罡阳喷灌机有限公司 | The bionic blade of liquid-ring type self priming pump |
| CN110667822A (en) * | 2019-09-30 | 2020-01-10 | 西北工业大学 | Rotatable bionical winglet of variable area |
| CN111188728A (en) * | 2020-02-13 | 2020-05-22 | 中国船级社质量认证公司 | Wind wheel blade of wind generating set |
| CN112943525A (en) * | 2021-03-29 | 2021-06-11 | 西安交通大学 | Bionic blade structure of coupling wind turbine |
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| CN111188728A (en) * | 2020-02-13 | 2020-05-22 | 中国船级社质量认证公司 | Wind wheel blade of wind generating set |
| CN112943525A (en) * | 2021-03-29 | 2021-06-11 | 西安交通大学 | Bionic blade structure of coupling wind turbine |
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Application publication date: 20151125 |