WO1995019500A1 - Eolienne - Google Patents

Eolienne Download PDF

Info

Publication number
WO1995019500A1
WO1995019500A1 PCT/DK1995/000017 DK9500017W WO9519500A1 WO 1995019500 A1 WO1995019500 A1 WO 1995019500A1 DK 9500017 W DK9500017 W DK 9500017W WO 9519500 A1 WO9519500 A1 WO 9519500A1
Authority
WO
WIPO (PCT)
Prior art keywords
trailing edge
wing
strip
threads
aramide
Prior art date
Application number
PCT/DK1995/000017
Other languages
English (en)
Inventor
Peter Grabau
Original Assignee
Lm Glasfiber A/S
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 Lm Glasfiber A/S filed Critical Lm Glasfiber A/S
Priority to AU14135/95A priority Critical patent/AU1413595A/en
Priority to DE19580147T priority patent/DE19580147B3/de
Publication of WO1995019500A1 publication Critical patent/WO1995019500A1/fr
Priority to DK073796A priority patent/DK172218B1/da

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
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • 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
    • F05B2240/304—Details of the trailing edge
    • 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
    • F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
    • F05B2240/311—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape flexible or elastic
    • 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
    • F05B2260/962—Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4004—Rubber
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/40—Organic materials
    • F05B2280/4006—Polyamides, e.g. NYLON
    • 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
    • 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

Definitions

  • the invention concerns a device for reducing noise at the wings of windmills comprising a frontal edge and a trailing edge with a wing profile therebetween and a wing tip.
  • Windmills take energy from the flowing air and changes the direction of the air which leaves each wing.
  • an annoying noise may be noticed which comprises noise from the gearbox which is fitted between the rotor shaft and the generator which is driven by the windmill and aerodynamic noise which in addition sometimes takes the form of a pure tone or whistle which predominantly stems from the influence of the wind on the wings.
  • Noise from the wings is in particular generated by pressure differences where two currents of air meet, i.e. where the flow from the front and rear sides of the wing meet at the rear edge and at the wing tip.
  • the pressure differences give rise to cross flows and vortices, and these may become audible when the flow is across sharp edges, which is the traditional shape of the trailing edge of wings.
  • the same vortex generation which causes the noise also influences the stability of the wing and of the whole windmill and its stalling characteristics, as well as a power loss because some of the power is radiated as acoustic power.
  • the pressure differences may be equalized faster if the flow caused thereby is used either for contributing to the work in moving the wing or may be braked diffusively.
  • the invention is based on the recognition that it is possible to let the trailing edge carry a material which is able to conform its shape to the pressure difference between upper and lower side of the wing at the trailing edge, possibly to let parts of the generated flow pass through this material. Due to this recognition a device for limiting the noise of a windmill wing particular in that the trailing edge is provided with a surface which is compliant along essentially the whole of the trailing edge.
  • a further advantageous embodiment is obtained by letting the surface consist of a strip of woven cloth in a strong material, but a knitted strip will be more compliant, as is well known, and this constitutes a further embodiment.
  • a further advantageous embodiment having even more compliance and a certain degree of damping of the flow is provided by letting the surface consist of a large number of smaller strips perpendicular to the trailing edge so that they may move independently and thereby further adjust to local pressure conditions.
  • Fig. 1 shows a cross section in a wing profile with an elastic trailing edge
  • Fig. 2 shows a cross section in a wing profile with a local deflection of the elastic trailing edge
  • Fig. 3 shows an enlarged image of the joint between the wing profile and the elastic trailing edge
  • Fig. 4 shows a wing profile with a trailing edge fitted with fibres
  • Fig. 5 shows an enlarged image of the joint between the wing profile with a trailing edge built of fibres.
  • a hollow wing profile which consists of two halves 1 and 2. They are each made in the traditional manner by building-up in a mould and by way of example utilising alternating layers of a polyester resin and glas cloth, with a smooth gel-coat as the first layer, i.e. closest to the smooth mould part.
  • a special cement is supplied to the front edge 3 and to the trailing edge 4, and according to the invention a strip of elastomeric material 5 is simultaneously cemented into it during assembly of the wing profile.
  • Fig. 3 it is shown how a sufficiently large area for cementing is provided for fastening the elastomer strip securely.
  • Fig. 1 a hollow wing profile which consists of two halves 1 and 2. They are each made in the traditional manner by building-up in a mould and by way of example utilising alternating layers of a polyester resin and glas cloth, with a smooth gel-coat as the first layer, i.e. closest to the smooth mould part.
  • a special cement is supplied to the front edge 3
  • the strip 5 of elastomeric material may advantageously have a profile of its own which is pointed towards the rear, and it may be reinforced in order that it is not worn to shreds during use.
  • Fig. 4 is correspondingly shown how a fibre strip 6 is fixed by cementing between the two halves l and 2 at the trailing edge 4, and in Fig. 5 is shown this cementing-in-place is shown in greater detail.
  • the strip is the last step in the manufacturing process, such as the use of a knitted strip or if the finished wing is provided with slits in the woven material or if the strip is taken completely to pieces to obtain individual fibres.
  • the important anchoring of the fibres is in the present case performed by cementing between the two wing profile halves, but it might also be obtained by disposing them as "eye lashes" in conjunction with the lamination of either of the two wing profile halves.
  • the important is that there is no sharp edge against which the fibres might be broken.
  • the strongest construction would be by lenghtwise slitting of woven ribbon which contains strong fibres, preferably aramide fibres.
  • This typically consists of a warp of cotton thread with a weft of aramide threads.
  • the lengthwise slitting enables one selvedge or list to be cemented or laminated to the wing, whereby a strong anchoring is obtained due to the loops.
  • the warp threads are removed by unravelling, and a very large number of aramide fibres remain which have a slight corrugation. In case a harder warp is used, the corrugation will be stronger, and it may be influenced by heat treatment after the weaving operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)
  • Woven Fabrics (AREA)

Abstract

Le bruit et d'autres manifestations nuisibles sur les éoliennes étant en grande partie dus aux tourbillons au niveau du bord de fuite de l'aile, on utilise un bord de fuite flexible capable de s'ajuster aux variations de pression locales. Dans un mode préféré de réalisation, on utilise un bord de fuite tissé (6) en fibres artificielles solides cimentées dans le bord arrière (4) du profil de l'aile, au niveau de la jonction entre les deux moitiés (1,2). L'effilochage des bandes, de sorte que le bord de fuite flexible soit constitué d'une grande quantité de fibres séparées, procure des avantages particuliers.
PCT/DK1995/000017 1994-01-12 1995-01-11 Eolienne WO1995019500A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU14135/95A AU1413595A (en) 1994-01-12 1995-01-11 Windmill
DE19580147T DE19580147B3 (de) 1994-01-12 1995-01-11 Windmühle
DK073796A DK172218B1 (da) 1994-01-12 1996-07-05 Vindmøllevinge med anordning til støjbegrænsning og fremgangsmåde til fremstilling af en sådan vinge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK5594 1994-01-12
DK0055/94 1994-01-12

Publications (1)

Publication Number Publication Date
WO1995019500A1 true WO1995019500A1 (fr) 1995-07-20

Family

ID=8089225

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000017 WO1995019500A1 (fr) 1994-01-12 1995-01-11 Eolienne

Country Status (4)

Country Link
AU (1) AU1413595A (fr)
DE (1) DE19580147B3 (fr)
DK (1) DK172218B1 (fr)
WO (1) WO1995019500A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644264A1 (de) * 1996-10-24 1998-05-07 Manfred Grefe Rotorblatt für Windkraftanlagen und Herstellungsverfahren dafür
DE19647102A1 (de) * 1996-11-14 1998-05-20 Philippe Arribi Strömungskörper
DE19738278A1 (de) * 1997-09-02 1999-03-04 Felix Hafner Adaptiver Rotor für Windkraftanlagen
EP0947693A2 (fr) 1998-03-31 1999-10-06 Tacke Windenergie GmbH Profil de pale pour éolienne
EP1314885A1 (fr) * 2001-11-26 2003-05-28 Bonus Energy A/S Bord de fuite flexible et cranelée pour pale d'éolienne
US6966758B2 (en) 2000-06-19 2005-11-22 Lm Glasfiber A/S Wind turbine rotor blade comprising one or more means secured to the blade for changing the profile thereof depending on the atmospheric temperature
WO2007071249A1 (fr) * 2005-12-20 2007-06-28 Lm Glasfiber A/S Lame de rotor de turbine a vent comprenant une section de bord trainant de section transversale constante
WO2008031913A1 (fr) * 2006-09-15 2008-03-20 Gamesa Innovation & Technology, S.L. Pale optimisée d'aérogénérateur
ES2318925A1 (es) * 2005-09-22 2009-05-01 GAMESA INNOVATION & TECHNOLOGY, S.L. Aerogenerador con un rotor de palas que reduce el ruido.
EP2196665A2 (fr) 2008-12-15 2010-06-16 REpower Systems AG Pale d'éolienne avec un turbulateur
EP2339171A2 (fr) 2009-12-22 2011-06-29 Siegfried Mickeler Pale pour une éolienne
US8018081B2 (en) 2005-07-15 2011-09-13 Southwest Windpower, Inc. Wind turbine and method of manufacture
WO2011157849A2 (fr) 2010-06-18 2011-12-22 Suzlon Blade Technology B.V. Pale de rotor pour éolienne
EP2666615A1 (fr) * 2012-05-23 2013-11-27 Nordex Energy GmbH Procédé de fabrication d'une demi-coque pour pale de rotor d'éolienne ou d'une pale de rotor d'éolienne et moule de fabrication à cette fin
DK201370323A1 (en) * 2013-06-17 2015-01-12 Envision Energy Denmark Aps Wind turbine blade with extended shell section
DK178050B1 (da) * 2011-10-19 2015-04-13 Gen Electric Vindmøllerotorvinge med bagkantforlængelse og fremgangsmåde til fastgørelse
US9638164B2 (en) 2013-10-31 2017-05-02 General Electric Company Chord extenders for a wind turbine rotor blade assembly
US10316817B2 (en) 2014-05-01 2019-06-11 Lm Wp Patent Holding A/S Wind turbine blade and an associated manufacturing method
WO2022136256A1 (fr) * 2020-12-22 2022-06-30 Lm Wind Power A/S Procédé de fabrication d'une coque de pale d'éolienne

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005019905B4 (de) * 2005-04-29 2012-12-06 Nordex Energy Gmbh Rotorblatt für eine Windenergieanlage
DE102005051931B4 (de) * 2005-10-29 2007-08-09 Nordex Energy Gmbh Rotorblatt für Windkraftanlagen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337263A2 (fr) * 1975-12-31 1977-07-29 Sicard Charles Ailette pour rotor d'un dispositif tournant sous l'action d'un fluide en mouvement
FR2374532A1 (fr) * 1976-12-17 1978-07-13 United Technologies Corp Pale a demi-longeron pour turbine eolienne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2527467B2 (de) * 1975-06-20 1978-10-19 Deutsche Forschungs- Und Versuchsanstalt Fuer Luft- Und Raumfahrt E.V., 5000 Koeln Überströmter Körper, insbesondere Tragflügel
DE3408532A1 (de) * 1984-03-06 1985-09-19 Ludolf von Dipl.-Ing. 1000 Berlin Walthausen Vorrichtung zur verminderung des hydrodynamischen widerstandes von schiffskoerpern
SE8600369D0 (sv) * 1986-01-28 1986-01-28 Stromberg Karl Otto Propeller jemte sett att framstella en sadan

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337263A2 (fr) * 1975-12-31 1977-07-29 Sicard Charles Ailette pour rotor d'un dispositif tournant sous l'action d'un fluide en mouvement
FR2374532A1 (fr) * 1976-12-17 1978-07-13 United Technologies Corp Pale a demi-longeron pour turbine eolienne

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT'S ABSTRACT, No. G3625K/19, Week 8319; & SU,A,939 838 (DON POLY, DONG), 30 June 1982. *
DERWENT'S ABSTRACT, No. G3626k/19, Week 8319; & SU,A,939 839 (DON POLY, DONE), 30 June 1982. *

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644264A1 (de) * 1996-10-24 1998-05-07 Manfred Grefe Rotorblatt für Windkraftanlagen und Herstellungsverfahren dafür
DE19647102A1 (de) * 1996-11-14 1998-05-20 Philippe Arribi Strömungskörper
DE19738278A1 (de) * 1997-09-02 1999-03-04 Felix Hafner Adaptiver Rotor für Windkraftanlagen
EP0947693A2 (fr) 1998-03-31 1999-10-06 Tacke Windenergie GmbH Profil de pale pour éolienne
US6966758B2 (en) 2000-06-19 2005-11-22 Lm Glasfiber A/S Wind turbine rotor blade comprising one or more means secured to the blade for changing the profile thereof depending on the atmospheric temperature
EP1314885A1 (fr) * 2001-11-26 2003-05-28 Bonus Energy A/S Bord de fuite flexible et cranelée pour pale d'éolienne
US8018081B2 (en) 2005-07-15 2011-09-13 Southwest Windpower, Inc. Wind turbine and method of manufacture
ES2318925A1 (es) * 2005-09-22 2009-05-01 GAMESA INNOVATION & TECHNOLOGY, S.L. Aerogenerador con un rotor de palas que reduce el ruido.
WO2007071249A1 (fr) * 2005-12-20 2007-06-28 Lm Glasfiber A/S Lame de rotor de turbine a vent comprenant une section de bord trainant de section transversale constante
US20090104038A1 (en) * 2005-12-20 2009-04-23 Peter Grabau Airfoil Family for a Blade of a Wind Turbine
CN101341332B (zh) * 2005-12-20 2012-12-12 Lm玻璃纤维有限公司 用于风力涡轮机叶片的剖面系列
ES2310958A1 (es) * 2006-09-15 2009-01-16 GAMESA INNOVATION & TECHNOLOGY, S.L. Pala de aerogenerador optimizada.
WO2008031913A1 (fr) * 2006-09-15 2008-03-20 Gamesa Innovation & Technology, S.L. Pale optimisée d'aérogénérateur
DE102008061838A1 (de) 2008-12-15 2010-06-17 Repower Systems Ag Rotorblatt einer Windenergieanlage mit einem Turbulator
EP2196665A2 (fr) 2008-12-15 2010-06-16 REpower Systems AG Pale d'éolienne avec un turbulateur
EP2339171A2 (fr) 2009-12-22 2011-06-29 Siegfried Mickeler Pale pour une éolienne
DE102009060650A1 (de) 2009-12-22 2011-06-30 Keller, Walter, 66994 Aeroakustisches Rotorblatt für eine Windkraftanlage sowie damit ausgestattete Windkraftanlage
WO2011157849A2 (fr) 2010-06-18 2011-12-22 Suzlon Blade Technology B.V. Pale de rotor pour éolienne
DK178050B1 (da) * 2011-10-19 2015-04-13 Gen Electric Vindmøllerotorvinge med bagkantforlængelse og fremgangsmåde til fastgørelse
US9108376B2 (en) 2012-05-23 2015-08-18 Nordex Energy Gmbh Method for making a wind turbine rotor blade half shell or wind turbine rotor blade and production mold therefor
US20130312900A1 (en) * 2012-05-23 2013-11-28 Nordex Energy Gmbh Method for making a wind turbine rotor blade half shell or wind turbine rotor blade and production mold therefor
EP2666615A1 (fr) * 2012-05-23 2013-11-27 Nordex Energy GmbH Procédé de fabrication d'une demi-coque pour pale de rotor d'éolienne ou d'une pale de rotor d'éolienne et moule de fabrication à cette fin
DK201370323A1 (en) * 2013-06-17 2015-01-12 Envision Energy Denmark Aps Wind turbine blade with extended shell section
DK177928B1 (en) * 2013-06-17 2015-01-19 Envision Energy Denmark Aps Wind turbine blade with extended shell section
US9638164B2 (en) 2013-10-31 2017-05-02 General Electric Company Chord extenders for a wind turbine rotor blade assembly
US10316817B2 (en) 2014-05-01 2019-06-11 Lm Wp Patent Holding A/S Wind turbine blade and an associated manufacturing method
WO2022136256A1 (fr) * 2020-12-22 2022-06-30 Lm Wind Power A/S Procédé de fabrication d'une coque de pale d'éolienne

Also Published As

Publication number Publication date
DK172218B1 (da) 1998-01-05
DE19580147B3 (de) 2012-11-29
DE19580147T1 (de) 1997-01-02
AU1413595A (en) 1995-08-01
DK73796A (da) 1996-07-05

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