DE19614420A1 - Rotor blade for wind power plant - Google Patents

Rotor blade for wind power plant

Info

Publication number
DE19614420A1
DE19614420A1 DE19614420A DE19614420A DE19614420A1 DE 19614420 A1 DE19614420 A1 DE 19614420A1 DE 19614420 A DE19614420 A DE 19614420A DE 19614420 A DE19614420 A DE 19614420A DE 19614420 A1 DE19614420 A1 DE 19614420A1
Authority
DE
Germany
Prior art keywords
rotor blade
edge
rotor
rear edge
gradation
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.)
Granted
Application number
DE19614420A
Other languages
German (de)
Other versions
DE19614420C2 (en
Inventor
Aloys Wobben
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19614420A priority Critical patent/DE19614420C2/en
Publication of DE19614420A1 publication Critical patent/DE19614420A1/en
Application granted granted Critical
Publication of DE19614420C2 publication Critical patent/DE19614420C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • 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
    • F05B2240/301—Cross-section characteristics
    • 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
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
    • 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

The rotor blade (1) has a pressure side (2), a suction side (3) and a rear edge (6) at which the departing air flows meet each other. There is at least one step (7, 8) reducing the cross section of the blade in the region of the rear edge, on either side or on both sides. The step may have an edge depth of more than 1 mm, preferably 2-10 mm. The step edge may be some 5-50 mm, preferably 15 mm, from the rear edge of the rotor blade. The wind energy plant or converter may have one or more rotors of the specified type.

Description

Rotorblätter für Windenergieanlagen sind in vielfacher Form bekannt. Leider haftet vielen Rotorblättern das Problem an, daß sie in einem nicht unerheblichen Maße bei Betrieb der Windenergieanlage und bei Windstärken ab 5-6 m/sec nicht un­ erhebliche Schallemissionen erzeugen, was aus Lärmschutzgründen besonders dann unangenehm ist, wenn die Windenergieanlage in der Nähe von Wohngebäuden aufgestellt wird. Die mit einer Windenergieanlage, bzw. einem Windenergiekonver­ ter bislang sich einstellenden Schallemissionen führen auch dazu, daß Windenergie­ anlagen aufgrund der Lärmentstehung Widerstände aus breiten Bevölkerungskreisen entgegentreten und sich diese Anlagen deswegen teilweise schwer oder gar nicht durchsetzen können, da die Genehmigungsbehörden wegen der bestehenden Umweltauflagen - auch Lärm zählt zur Umweltbelastung - die Genehmigung von Windenergieanlagen verweigern.Rotor blades for wind turbines are known in many forms. Unfortunately, is liable many rotor blades the problem that they contribute to a not inconsiderable degree Operation of the wind turbine and at wind speeds from 5-6 m / sec not un generate significant noise emissions, which is particularly important for noise protection reasons is uncomfortable if the wind turbine near residential buildings is set up. The one with a wind turbine or a wind energy converter The noise emissions that have occurred so far also lead to wind energy due to the noise generation, resistance from broad sections of the population oppose and therefore these facilities sometimes difficult or not at all can enforce, because the licensing authorities because of the existing Environmental regulations - noise is also part of the environmental impact - the approval of Deny wind turbines.

Es ist daher Ziel der Erfindung, die Schallemissionen von Windenergieanlagen zu verringern.It is therefore the aim of the invention to reduce the noise emissions from wind turbines to decrease.

Dieses Ziel wird erfindungsgemäß dadurch erreicht, daß im Bereich der Rotorblatt­ hinterkante eines Rotors eine den Querschnitt des Rotorblatts verringernde Abstufung angeordnet ist; vorzugsweise ist die Abstufung sowohl auf der Druck- als auch auf der Saugseite der Hinterkante des Rotorblattes vorgesehen. This goal is achieved in that in the area of the rotor blade trailing edge of a rotor a reducing the cross section of the rotor blade Gradation is arranged; preferably the gradation is both on the print as also provided on the suction side of the rear edge of the rotor blade.  

Die erfindungsgemäße Maßnahme hat zur Folge, daß anders als bei der herkömm­ lichen Lösung - siehe Fig. 1 -, bei der die Luftströmungen der Druck- und Saugseite an der Blatthinterkante ungehindert zusammentreffen, bei dem erfindungsgemäßen Rotorblatt die Strömungen durch die Stufen verwirbelt werden - siehe Fig. 2 - und erst dann diffus und mit geringerer Geschwindigkeit zusammentreffen.The measure according to the invention has the result that, unlike in the conventional solution - see Fig. 1 - in which the air flows of the pressure and suction side meet unhindered at the trailing edge of the blade, the flows through the steps are swirled in the rotor blade according to the invention - see Fig. 2 - and only then meet diffusely and at a slower speed.

Bei ersten Versuchen im Windkanal wurde eine deutliche Minderung des Geräusch­ pegels festgestellt. Bei diesen Versuchen betrug die Abstufungstiefe ca. 2 mm und die Abstufung selbst war etwa 15 mm von der Rotorblatthinterkante entfernt.During the first tests in the wind tunnel, the noise was significantly reduced level determined. In these tests, the gradation depth was approx. 2 mm and the gradation itself was about 15 mm from the rear edge of the rotor blade.

Die erfindungsgemäßen Maßnahmen können sehr leicht in der Rotorblattproduktion umgesetzt werden und haben keine Minderung der Rotorblattleistung zur Folge.The measures according to the invention can be very easily in the rotor blade production are implemented and do not result in a reduction in the rotor blade performance.

Die Erfindung wird nachfolgend anhand eines zeichnerisch dargestellten Aus­ führungsbeispiels näher erläutert. In der Zeichnung stellen dar:The invention is described below with reference to a drawing management example explained in more detail. In the drawing:

Fig. 1 Einen Querschnitt durch ein herkömmliches Rotorblatt, Fig. 1 is a cross-sectional view of a conventional rotor blade,

Fig. 2 Einen Querschnitt durch ein erfindungsgemäßes Rotorblatt. Fig. 2 shows a cross section through an inventive rotor blade.

In Fig. 1 ist ein herkömmliches Rotorblatt 1 im Querschnitt dargestellt. Dieses Rotorblatt 1 weist eine Druckseite 2 und eine Saugseite 3 auf. Sowohl Druck- als auch Saugseite werden von entsprechenden Luftströmungen 4 und 5 überstrichen. Im Bereich der Rotorblatthinterkante 6 treffen diese Strömungen ungehindert aufeinander und erzeugen - so denn die Bewegungsvektoren über einen bestimmten Betrag verfügen - eine nicht unerhebliche Schallemission im Frequenzbereich von 1000 bis 4000 Hz. Diese Schallemission kann sich als sehr störend für Personen auswirken, welche sich in der Nähe einer Windenergieanlage aufhalten und der Schallemission ununterbrochen ausgesetzt sind.In Fig. 1, a conventional rotor blade 1 is shown in cross section. This rotor blade 1 has a pressure side 2 and a suction side 3 . Both the pressure side and the suction side are covered by corresponding air flows 4 and 5 . In the area of the rotor blade trailing edge 6 , these flows meet each other unhindered and - because the motion vectors have a certain amount - generate a not inconsiderable sound emission in the frequency range from 1000 to 4000 Hz. This sound emission can be very disturbing for people who are in the Stay close to a wind turbine and be continuously exposed to noise.

In Fig. 2 ist ein erfindungsgemäßes Rotorblatt im Querschnitt dargestellt, bei dem im Bereich der Rotorblatthinterkante 6 sowohl auf der Druckseite 2 als auch auf der Saugseite 3 des Rotorblatts 1 Abstufungen 7 und 8 in das Rotorblatt eingelassen sind, welche den Querschnitt des Rotorblatts verringern. Die Abstufungen sind im gezeigten Beispiel übertrieben stark dargestellt, um den strömungstechnischen Verwirbelungseffekt besser zu zeigen. Kommt die Luftströmung an einer Seite des Rotorblatts an die Abstufung, so wird sie dort verwirbelt und die verwirbelten Luftströmungen treffen bei Verlassen der Rotorblatthinterkante diffus und mit verringerter Geschwindigkeit aufeinander. Die dann noch entstehenden Schall­ verringerter Geschwindigkeit aufeinander. Die dann noch entstehenden Schall­ emissionen verfügen über einen erheblich geringeren Schallpegel, als bei bekannten Rotorblättern.In Fig. 2 shows an inventive rotor blade is shown in cross-section, 1 gradations in which the region of the rotor blade trailing edge 6, both on the pressure side 2 and on the suction side 3 of the rotor blade embedded in the rotor blade 7 and 8, which reduce the cross section of the rotor blade. The gradations are exaggerated in the example shown in order to better show the fluid turbulence effect. If the air flow comes to the gradation on one side of the rotor blade, it is swirled there and the swirled air flows meet diffusely and at a reduced speed when leaving the rear edge of the rotor blade. The then still occurring sound of reduced speed on each other. The resulting noise emissions have a significantly lower sound level than with known rotor blades.

Eine Schallpegelverringerung wird auch dann erreicht, wenn die Abstufung nur an einer Seite des Rotorblatts vorgesehen wird. Die besten Messungen in einem Windkanal konnten jedoch erzielt werden, wenn die Abstufungen im Bereich der Rotorblatthinterkante an beiden Seiten des Rotorblatts eingelassen wurden.A sound level reduction is also achieved if the gradation is only on one side of the rotor blade is provided. The best measurements in one However, wind tunnels could be achieved if the gradations in the area of The rear edge of the rotor blade was embedded on both sides of the rotor blade.

Claims (4)

1. Rotorblatt (1) mit einer Druckseite (2), einer Saugseite (3) und einer Rotorblatthinterkante (6), an der abströmende Luftströme aufeinandertreffen, dadurch gekennzeichnet, daß im Bereich der Rotorblatthinterkante (6) auf der Druck- und/oder Saugseite (2, 3) wenigstens eine den Querschnitt des Rotor­ blatts (1) verringernde Abstufung (7, 8) vorgesehen ist.1. rotor blade ( 1 ) with a pressure side ( 2 ), a suction side ( 3 ) and a rotor blade trailing edge ( 6 ) on which outflowing air currents meet, characterized in that in the region of the rotor blade trailing edge ( 6 ) on the pressure and / or suction side ( 2 , 3 ) at least one step ( 7 , 8 ) reducing the cross section of the rotor blade ( 1 ) is provided. 2. Rotorblatt nach Anspruch 1, dadurch gekennzeichnet, daß auf jeder Rotorblattseite im Bereich der Rotorblatt­ hinterkante eine Abstufung vorgesehen ist.2. rotor blade according to claim 1, characterized in that on each rotor blade side in the area of the rotor blade trailing edge is provided. 3. Rotorblatt nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Abstufung eine Kantentiefe von mehr als 1 mm, vorzugsweise 2-10 mm und die Abstufungskante etwa 5-50 mm, vorzugsweise 15 mm von der Rotorblatthinterkante entfernt angeordnet ist.3. rotor blade according to claim 1 or 2, characterized in that the gradation has an edge depth of more than 1 mm, preferably 2-10 mm and the gradation edge about 5-50 mm, preferably 15 mm is arranged away from the rear edge of the rotor blade. 4. Windenergieanlage, bzw. Windkonverter mit einem Rotor, mit einem oder mehreren Rotorblättern (1) nach einem der vorhergehenden Ansprüche.4. Wind turbine or wind converter with a rotor, with one or more rotor blades ( 1 ) according to one of the preceding claims.
DE19614420A 1996-04-12 1996-04-12 Rotor blade and wind turbine with a rotor blade Expired - Lifetime DE19614420C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19614420A DE19614420C2 (en) 1996-04-12 1996-04-12 Rotor blade and wind turbine with a rotor blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19614420A DE19614420C2 (en) 1996-04-12 1996-04-12 Rotor blade and wind turbine with a rotor blade

Publications (2)

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DE19614420A1 true DE19614420A1 (en) 1997-10-16
DE19614420C2 DE19614420C2 (en) 2003-05-22

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738278A1 (en) * 1997-09-02 1999-03-04 Felix Hafner Adaptive rotor for wind power plants
FR2802579A1 (en) * 1999-12-21 2001-06-22 Jeumont Ind Centrifugal pump or compressor blade has triangular section channel forming three or more edges in trailing edge
EP1141543A1 (en) † 1998-12-09 2001-10-10 Aloys Wobben Reduction in the noise produced by a rotor blade of a wind turbine
DE19743694C2 (en) * 1997-10-02 2001-11-15 Aloys Wobben Rotor blade and wind turbine with one rotor blade
WO2003019014A1 (en) * 2001-08-29 2003-03-06 Nikolaos Papageorgiou Method for improving the efficiency of airfoils/hydrofoils
WO2004061298A2 (en) 2003-01-02 2004-07-22 Aloys Wobben Wind turbine rotor blade with reduced noise emission
DE202009014235U1 (en) 2009-10-21 2010-01-14 Glunz, Josef Horizontal axes wind generator
DE102012000376A1 (en) * 2012-01-12 2013-07-18 Ebm-Papst St. Georgen Gmbh & Co. Kg Axial or diagonal fan
KR101291663B1 (en) 2011-09-29 2013-08-01 삼성중공업 주식회사 Turbine blade and wind turbine equipped whit the same
US8550777B2 (en) 2007-08-29 2013-10-08 Lm Glasfiber A/S Wind turbine blade and blade element combination and method of changing the aerodynamic profile of a wind turbine blade
EP2778392A1 (en) * 2013-03-15 2014-09-17 General Electric Company A rotor blade for a wind turbine
DE102016117012A1 (en) 2016-09-09 2018-03-15 Wobben Properties Gmbh Wind turbine rotor blade
WO2019105517A1 (en) * 2017-12-01 2019-06-06 Vestas Wind Systems A/S Wind turbine blade

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10244022B4 (en) * 2002-09-21 2005-03-10 Aloys Wobben rotor blade
DE10300284A1 (en) * 2003-01-02 2004-07-15 Aloys Wobben Turbine rotor blade for wind-powered energy plant has tip region curved or angled in direction of rotor blade trailing edge
DE102005051931B4 (en) * 2005-10-29 2007-08-09 Nordex Energy Gmbh Rotor blade for wind turbines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB731526A (en) * 1951-04-23 1955-06-08 Howden James & Co Ltd Improvements in or relating to radial flow impellers
US2819837A (en) * 1952-06-19 1958-01-14 Laval Steam Turbine Co Compressor
US3565548A (en) * 1969-01-24 1971-02-23 Gen Electric Transonic buckets for axial flow turbines
GB2032048A (en) * 1978-07-15 1980-04-30 English Electric Co Ltd Boundary layer control device
US4408958A (en) * 1980-12-23 1983-10-11 The Bendix Corporation Wind turbine blade
EP0652367A1 (en) * 1993-11-04 1995-05-10 Stork Product Engineering B.V. Noise reduction for wind turbine
US5417548A (en) * 1994-01-14 1995-05-23 Midwest Research Institute Root region airfoil for wind turbine
DE4428730A1 (en) * 1994-08-15 1996-02-22 Biotech Gmbh Zwickau Planungs Metallic rotor blade for wind powered systems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB731526A (en) * 1951-04-23 1955-06-08 Howden James & Co Ltd Improvements in or relating to radial flow impellers
US2819837A (en) * 1952-06-19 1958-01-14 Laval Steam Turbine Co Compressor
US3565548A (en) * 1969-01-24 1971-02-23 Gen Electric Transonic buckets for axial flow turbines
GB2032048A (en) * 1978-07-15 1980-04-30 English Electric Co Ltd Boundary layer control device
US4408958A (en) * 1980-12-23 1983-10-11 The Bendix Corporation Wind turbine blade
EP0652367A1 (en) * 1993-11-04 1995-05-10 Stork Product Engineering B.V. Noise reduction for wind turbine
US5417548A (en) * 1994-01-14 1995-05-23 Midwest Research Institute Root region airfoil for wind turbine
DE4428730A1 (en) * 1994-08-15 1996-02-22 Biotech Gmbh Zwickau Planungs Metallic rotor blade for wind powered systems

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738278A1 (en) * 1997-09-02 1999-03-04 Felix Hafner Adaptive rotor for wind power plants
DE19743694C2 (en) * 1997-10-02 2001-11-15 Aloys Wobben Rotor blade and wind turbine with one rotor blade
US6398502B1 (en) 1997-10-02 2002-06-04 Aloys Wobben Quiet rotor blade and wind energy installation equipped with rotor blades of this type
EP1141543A1 (en) † 1998-12-09 2001-10-10 Aloys Wobben Reduction in the noise produced by a rotor blade of a wind turbine
US6729846B1 (en) 1998-12-09 2004-05-04 Aloys Wobben Reduction in the noise produced by a rotor blade of a wind turbine
EP1141543B2 (en) † 1998-12-09 2013-11-20 Aloys Wobben Rotor blade of a wind turbine
US7108485B2 (en) 1998-12-09 2006-09-19 Aloys Wobben Reduction in the noise produced by a rotor blade of a wind turbine
FR2802579A1 (en) * 1999-12-21 2001-06-22 Jeumont Ind Centrifugal pump or compressor blade has triangular section channel forming three or more edges in trailing edge
WO2001046593A1 (en) * 1999-12-21 2001-06-28 Jeumont Sa Blade of a centrifuge machine and method for regulating the performance of said blade
WO2003019014A1 (en) * 2001-08-29 2003-03-06 Nikolaos Papageorgiou Method for improving the efficiency of airfoils/hydrofoils
US7841836B2 (en) 2003-01-02 2010-11-30 Aloys Wobben Rotor blade for a wind power plant
US7540716B2 (en) 2003-01-02 2009-06-02 Aloys Wobben Rotor blade for a wind power plant
EP2469077A2 (en) 2003-01-02 2012-06-27 Aloys Wobben Rotor blade for a wind energy facility
US8241002B2 (en) 2003-01-02 2012-08-14 Aloys Wobben Rotor blade for a wind power plant
WO2004061298A2 (en) 2003-01-02 2004-07-22 Aloys Wobben Wind turbine rotor blade with reduced noise emission
US8550777B2 (en) 2007-08-29 2013-10-08 Lm Glasfiber A/S Wind turbine blade and blade element combination and method of changing the aerodynamic profile of a wind turbine blade
DE202009014235U1 (en) 2009-10-21 2010-01-14 Glunz, Josef Horizontal axes wind generator
KR101291663B1 (en) 2011-09-29 2013-08-01 삼성중공업 주식회사 Turbine blade and wind turbine equipped whit the same
DE102012000376A1 (en) * 2012-01-12 2013-07-18 Ebm-Papst St. Georgen Gmbh & Co. Kg Axial or diagonal fan
DE102012000376B4 (en) * 2012-01-12 2013-08-14 Ebm-Papst St. Georgen Gmbh & Co. Kg Axial or diagonal fan
EP2778392A1 (en) * 2013-03-15 2014-09-17 General Electric Company A rotor blade for a wind turbine
US9377005B2 (en) 2013-03-15 2016-06-28 General Electric Company Airfoil modifiers for wind turbine rotor blades
DE102016117012A1 (en) 2016-09-09 2018-03-15 Wobben Properties Gmbh Wind turbine rotor blade
WO2018046519A1 (en) 2016-09-09 2018-03-15 Wobben Properties Gmbh Wind turbine rotor blade
RU2709228C1 (en) * 2016-09-09 2019-12-17 Воббен Пропертиз Гмбх Wind turbine rotor blade
US10767625B2 (en) 2016-09-09 2020-09-08 Wobben Properties Gmbh Wind turbine rotor blade
WO2019105517A1 (en) * 2017-12-01 2019-06-06 Vestas Wind Systems A/S Wind turbine blade

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