CN102918263A - Wind turbine blades with dimples - Google Patents
Wind turbine blades with dimples Download PDFInfo
- Publication number
- CN102918263A CN102918263A CN2011800266921A CN201180026692A CN102918263A CN 102918263 A CN102918263 A CN 102918263A CN 2011800266921 A CN2011800266921 A CN 2011800266921A CN 201180026692 A CN201180026692 A CN 201180026692A CN 102918263 A CN102918263 A CN 102918263A
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- CN
- China
- Prior art keywords
- blade
- wind turbine
- wind
- groove
- technology
- 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.)
- Pending
Links
- 238000009792 diffusion process Methods 0.000 claims abstract 2
- 230000008901 benefit Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 230000002411 adverse Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/32—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor with roughened surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/20—Geometry three-dimensional
- F05B2250/24—Geometry three-dimensional ellipsoidal
- F05B2250/241—Geometry three-dimensional ellipsoidal spherical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/20—Geometry three-dimensional
- F05B2250/28—Geometry three-dimensional patterned
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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
Abstract
Wind turbine blades (2) which are characterised from being equipped with dimples (3) of hemispherical or polygonal shape as many as possible of them and as much as closer one another arranged in rows and alternately between them alongside blade's whole surface. Applying this dimple arrangement technique on blade's surface, a drastic management of specific aerodynamic phenomena contributing to the most possible wind laminar flow and steady blade rotation maximizing quality, reliability, economically and noiseless wind turbine operation which because of diffusion at a significant degree of the two side pressure difference, a speedier rotation is succeeded (more rounds per minute) finally maximizing electric energy production.
Description
Technical field
The present invention relates to a kind of technology that is applied to be arranged in the epitrochanterian horizontal axis wind turbine blade on the wind turbine tower.
Background technique
The vaned wind turbine of such tool is known, and it is made by the light plastics, aluminium, the thin known materials such as wooden layer that utilize glass to strengthen.The back side of blade is more crooked than the front.Except the performance on wind turbine had the length of crucial impact, other factors such as width, thickness and weight also can have impact to the maximization of the rotation that is characterised in that demand on the aerodynamic design and the balance between the durability.
Wind turbine blade is Design and manufacture in a particular manner, be arranged on the rotor, with farthest utilize make blade rotation through wherein wind energy.By the rotation of blade on axle, by generator kinetic energy (rotational) is converted into electric energy.The pressure group that brings by wind-engaging only and the impact of fitful wind cause and carry out the rotation of these blades.According to the ratio of implementing, rotating speed can be judged to be negative (economically without income or dangerous) or positive (suitable and useful).In the process of the head-on crash of rotation blade, wind speed decreased causes face of blade pressure to raise at air molecule, and backside pressure reduces, and has produced thus whirlpool and eddy current.When blade rotates with sufficiently high speed, can produce significant whirlpool and eddy current at vacuum side of blade, thereby cause the pressure difference (non-uniform Distribution) that rotation is had adverse effect, and then hinder normal running and the performance of wind turbine.At first, blade is accepted the aerodynamics pressure of wind from the front, and causes blade rotary.Afterwards, just because of the effect of the pressure difference that produces that is mainly manifested in vacuum side of blade, produced disadvantageous aerodynamics phenomenon (whirlpool and eddy current), thereby having caused rotating slows down and other are unfavorable for the complex situations of desirable rotation.Therefore, these consequences comprise the adverse effect of wind turbine operation, can't make its maximizing performance.The turbulent flow that the wind impact blades produces is larger, and the energy that then aweather transmits from blade is also just larger, and vice versa.This energy interaction between blade and the wind is aerodynamic drag.More specifically, it comprises windage (resistance) and vertical direction or the dynamic wind climbing power (lift) of substantially horizontal.The windage of substantially horizontal (resistance) acts on the contrary with wind direction, thereby reduces the speed of rotation of blade, causes pressure difference.Power (showing as resistance form or pressure resistance) is pointed to the zone (vacuum side of blade) with less pressure from the zone (face of blade) with larger pressure.
Summary of the invention
Advantage of the present invention is, with on the blade that specifically is arranged sequentially in wind turbine, this is a kind of hemisphere that is arranged on the golf ball or technology of polygonal (such as Hexagon) groove of directly being referred from hemispheric groove.This technology takes full advantage of the aerodynamics phenomenon, and wind in the face of blade impact blades, passes blade at first, flows out in blade at last.The present invention farthest manages this process, and forms suitable and controlled laminar-flow air stream in these positions, blade rotary is got more stable, thereby high quality, reliable, economic and quietly wind turbine running are provided.
With the groove arrangement technical equivalents in the golf ball be applied to the wind turbine blade surface, be in order to reappear the formation of most probable laminar-flow air stream, and finally with the most effective mode administrative institute follow enter blade with the wind that flows out blade.Thereby with the possible pressure difference that reduces to greatest extent between the blade both sides.
Wind turbine blade of the present invention is successfully, because it can produce the quickest possible blade rotary (rotating cycle of per minute is more), makes electric energy production reach maximum.By use this groove arrangement technology at the tow sides of blade, strengthened the management to wind, make simultaneously maximize revenue, and whirlpool and the eddy current of easy appearance have more systematically been reduced, reduce horizontal windage (resistance) to the negative effect of vacuum side of blade in the most effective mode, reduced pressure.By using this particular groove placement technique, wind turbine blade carries out high speed rotating speed, management bump and flow into wind in the blade most effectively, and can be equilibrated at whirlpool and the eddy current that vacuum side of blade produces, and then makes lift reach maximum.In other words, be passed at identical wind load in the situation of wind turbine, can produce more electric energy, this just with golf ball on situation similar, and this is to bring by using and being proved to be very successful groove arrangement technology.This groove is used in the surface of golf ball, or hemisphere or polygonal groove, and is many as far as possible and arrange as close as possible in a row each other and mutually alternately, with ball covering on soil surface fully and even curface is minimized.When the player used club to impact spheroid with identical dynamics, the distance of this golf will be significantly higher than the distance that the old-fashioned golf ball of surfacing moves.Therefore, in the situation that specific wind-force acts on the wind turbine blade surface, when having used the particular groove placement technique of the identical topology as in the golf ball, it is maximum that the rotation of blade will finally reach.Wind turbine blade according to the present invention is characterised in that, its surface use the groove arrangement technology as golf ball.Groove can cover the surface of blade fully, perhaps also can only cover the back side, with only can be effectively to the resistive drag force phenomenon.
A kind of hemisphere or polygonal (such as Hexagon) groove that simply embodies the mode of this particular groove placement technique many as far as possible by using according to the present invention (quantity of groove and cover surperficial proportional) at wind turbine blade realized, these grooves are closely arranged in a row and mutually as far as possible each other and are replaced, produce tangent form, cover the tow sides of whole blade, thereby farthest utilize and managed wind during the frontal impact in front and the aerodynamics phenomenon that occurs between moving period towards the back side of wind, so that disadvantageous retardance pressure (resistance) has been eliminated in the lift maximization simultaneously.
By this relatively cheap groove arrangement technology being applied on the existing blade surface and passing through to make up this novel blade, significantly improved the ratio of manufacture cost with the benefit of Energy output, and, by providing simultaneously more economical, controlled and useful operation to wind turbine, also realized quieter and the usually still less operation of fault.
According to groove arrangement technology of the present invention, hemisphere or polygonal groove are arranged in permission as much as possible on the surface of wind turbine blade, these grooves are arranged in a row and mutually in as close as possible each other mode and are replaced, produce tangent form, so that laminar-flow air stream and air administrative maximization, to reduce frontal drag, thereby make lift reach maximum, make frictional force reach minimum, this be because the air molecule of ensuing air bolus will be captured in these grooves in before air molecule contact, rather than directly contact the flat surface that adverse effect is arranged or the material of blade.
Description of drawings
Fig. 1 shows the plan view of three wind turbine blades.
Fig. 2 shows the plan view after blade amplifies.
Fig. 3 shows the rear view of three wind turbine blades.
Embodiment
Describe the method for using the groove arrangement technology on the wind turbine blade surface with reference to the accompanying drawings.Wind turbine is made of rotor (1), blade (2), hemispherical groove (3) and wind turbine tower (4).Groove according to the surface size of blade with the highest quantity and be arranged in rows with desirable effective dimensions on the surface of blade, close to each other and mutually alternately as much as possible, produce tangent form.
As shown in drawings, only be furnished with the identical hemispherical groove of size at blade surface.Yet, this does not get rid of the mode of execution of the only polygonal groove (such as hexagonal indentations) of arranging based on the hemispherical groove placement technique, these polygonal grooves are close to each other as much as possible, arrange in a row and mutually and replace, produce tangent form, thereby all cover the surface of blade at the tow sides of blade fully.
Claims (4)
1. wind turbine blade, has rotor (1) at wind turbine tower (4), described blade (2) is provided with groove (3), it is characterized in that, described groove (3) only is hemisphere or polygonal (for example Hexagon) and is arranged on the surface of described blade, described groove (3) is many as far as possible and arrange as far as possible close to each other in a row and alternately mutual, so that described groove (3) is tangent to each other, fully cover the surface of described blade at the tow sides of described blade.
2. the wind turbine blade that is provided with hemisphere or polygonal groove arrangement technology as claimed in claim 1, it is characterized in that, the surface of described wind turbine blade is covered fully, so that utilization and management from the wind of the movement of face of blade are realized maximization, by the aerodynamics advantage of utilizing specific groove arrangement technology to bring, described wind turbine blade is farthest brought into play performance, realized simultaneously on the surface of these blades and the Laminar Flow of the maximum of the friction of the minimum when passing blade and flowing out blade and air, because this technology, in fact eliminated the pressure difference between the blade tow sides, the ratio of resistance is minimized simultaneously, the result of this technology is, realize as much as possible the maximization (the rotation number of turns of per minute is more) of blade rotary, thereby produced more electric energy.
3. the wind turbine blade that is provided with hemisphere or polygonal groove arrangement technology as claimed in claim 1, it is characterized in that, described groove is arranged with the precision setting that covers blade surface fully, so that to the management of wind, the mass diffusion of the Laminar Flow of air molecule and whole wind realizes maximization, described wind turbine blade can farthest utilize and manage the aerodynamics phenomenon that produces during the transfer of vacuum side of blade at the frontal impact of face of blade and air molecule because of wind, so that the lift maximization has been eliminated simultaneously from the disadvantageous deceleration pressure (resistance) of the wind of vacuum side of blade outflow.
4. the wind turbine blade that is provided with hemisphere or polygonal groove arrangement technology as claimed in claim 1 is characterized in that, described specific technology can only be applied to the surface of vacuum side of blade, and therefore described technology only minimizes for resistance.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GR20100100474A GR1008803B (en) | 2010-09-01 | 2010-09-01 | Wind generator's blades |
| GR20100100474 | 2010-09-01 | ||
| PCT/GR2011/000033 WO2012028890A1 (en) | 2010-09-01 | 2011-08-10 | Wind turbine blades with dimples |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102918263A true CN102918263A (en) | 2013-02-06 |
Family
ID=44534493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800266921A Pending CN102918263A (en) | 2010-09-01 | 2011-08-10 | Wind turbine blades with dimples |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102918263A (en) |
| GR (1) | GR1008803B (en) |
| WO (1) | WO2012028890A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089924A (en) * | 2015-08-26 | 2015-11-25 | 陈海花 | Electric generator blade |
| CN116753111A (en) * | 2023-08-11 | 2023-09-15 | 南京永乐照明灯饰有限公司 | Composite wind power generation blade with stable speed increasing and high efficiency |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9475141B2 (en) | 2011-08-04 | 2016-10-25 | Milwaukee Electric Tool Corporation | Reciprocating saw blade |
| USD688543S1 (en) | 2012-03-20 | 2013-08-27 | Milwaukee Electric Tool Corporation | Saw blade |
| IES86162B2 (en) * | 2012-08-09 | 2013-03-27 | New World Energy Entpr Ltd | Aerofoil blades |
| DE102014104466A1 (en) * | 2014-03-28 | 2015-10-01 | Rainer Marquardt | Wind turbine for rooftops |
| USD729600S1 (en) | 2014-05-06 | 2015-05-19 | Milwaukee Electric Tool Corporation | Saw blade |
| MX2017012325A (en) | 2015-04-08 | 2017-12-20 | Horton Inc | Fan blade surface features. |
| NL1041491B1 (en) * | 2015-09-25 | 2017-04-19 | Home Turbine B V | Device for converting wind energy into at least mechanical energy. |
| WO2017052371A1 (en) * | 2015-09-21 | 2017-03-30 | Home Turbine B.V. | Device for converting wind energy into at least mechanical energy |
| EP3399182B1 (en) | 2017-05-05 | 2020-11-11 | Nordex Energy GmbH | Low noise rotor blade tip |
| CN109386426A (en) * | 2017-08-09 | 2019-02-26 | 新疆工程学院 | The pneumatic equipment bladess and wind energy conversion system of a kind of linear micro- cavernous structure of trailing edge |
| CN109386425A (en) * | 2017-08-09 | 2019-02-26 | 新疆工程学院 | The pneumatic equipment bladess and wind energy conversion system of a kind of linear micro- cavernous structure of blade inlet edge |
| PL441284A1 (en) * | 2022-05-26 | 2023-11-27 | Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie | Horizontal axis wind turbine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872484A (en) * | 1988-12-12 | 1989-10-10 | John Hickey | System for controlling the flow of a fluid medium relative to an object |
| EP1469198A1 (en) * | 2003-04-17 | 2004-10-20 | Eugen Radtke | Wind energy converter with lift improving surface structure. |
| CN1705822A (en) * | 2002-10-22 | 2005-12-07 | 西门子公司 | Wind power unit with structured surfaces for improvement of flow |
| CN101029629A (en) * | 2005-11-17 | 2007-09-05 | 通用电气公司 | Rotor blade for a wind turbine having aerodynamic feature elements |
| CN101321949A (en) * | 2005-12-05 | 2008-12-10 | Lm玻璃纤维制品有限公司 | Blade for a wind turbine rotor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7344353B2 (en) * | 2005-05-13 | 2008-03-18 | Arrowind Corporation | Helical wind turbine |
| EP2031241A1 (en) * | 2007-08-29 | 2009-03-04 | Lm Glasfiber A/S | Blade for a rotor of a wind turbine provided with barrier generating means |
-
2010
- 2010-09-01 GR GR20100100474A patent/GR1008803B/en active IP Right Grant
-
2011
- 2011-08-10 CN CN2011800266921A patent/CN102918263A/en active Pending
- 2011-08-10 WO PCT/GR2011/000033 patent/WO2012028890A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872484A (en) * | 1988-12-12 | 1989-10-10 | John Hickey | System for controlling the flow of a fluid medium relative to an object |
| CN1705822A (en) * | 2002-10-22 | 2005-12-07 | 西门子公司 | Wind power unit with structured surfaces for improvement of flow |
| EP1469198A1 (en) * | 2003-04-17 | 2004-10-20 | Eugen Radtke | Wind energy converter with lift improving surface structure. |
| CN101029629A (en) * | 2005-11-17 | 2007-09-05 | 通用电气公司 | Rotor blade for a wind turbine having aerodynamic feature elements |
| CN101321949A (en) * | 2005-12-05 | 2008-12-10 | Lm玻璃纤维制品有限公司 | Blade for a wind turbine rotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089924A (en) * | 2015-08-26 | 2015-11-25 | 陈海花 | Electric generator blade |
| CN116753111A (en) * | 2023-08-11 | 2023-09-15 | 南京永乐照明灯饰有限公司 | Composite wind power generation blade with stable speed increasing and high efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| GR1008803B (en) | 2016-07-01 |
| GR20100100474A (en) | 2012-04-30 |
| WO2012028890A1 (en) | 2012-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |