WO1992001156A1 - Pale pour moulin a vent - Google Patents

Pale pour moulin a vent Download PDF

Info

Publication number
WO1992001156A1
WO1992001156A1 PCT/DK1991/000201 DK9100201W WO9201156A1 WO 1992001156 A1 WO1992001156 A1 WO 1992001156A1 DK 9100201 W DK9100201 W DK 9100201W WO 9201156 A1 WO9201156 A1 WO 9201156A1
Authority
WO
WIPO (PCT)
Prior art keywords
wing
tip
angle
windmill
section
Prior art date
Application number
PCT/DK1991/000201
Other languages
English (en)
Inventor
Henrik Stiesdal
Original Assignee
Danregn Vindkraft 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 Danregn Vindkraft A/S filed Critical Danregn Vindkraft A/S
Publication of WO1992001156A1 publication Critical patent/WO1992001156A1/fr

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
    • F05B2240/301—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
    • 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

Definitions

  • the invention relates to a wing for a windmill, where the angle between the rotor plane and the chord in a given section of the wing decreases in a substantially uniform manner with the distance of the cross-section from the rotor axis, or is constant.
  • Two or three of such wings are disposed at a uniform angular distance on a hub for the formation of a wind rotor which is made to rotate by the wind around a rotor axis, so that the wings rotate in one plane, the rotation plane or the rotor plane.
  • the wings of a windmill emit considerable noise which to a substantial de ⁇ gree stems from the extreme radial end of the wing, which in the following is called the wing tip, and by the so- called tip-whirl generated by the wing tip.
  • the cross-section of the wings for windmills is twisted in relation to the rotor plane in such a manner that the chord in a given cross-section of the wing forms an angle with said plane.
  • This angle is calculated on the basis of considerations concerning how the optimum angle of incidence can be achieved.
  • the wing is optimal at a certain wind velocity, and it is with this wind velocity that the calculation is carried out.
  • the load in the vicinity of the wing tip will thus be relatively high, and the pressure difference between the pressure and the suction side of the wing is corresponding ⁇ ly great.
  • the wing and especially the wing tip emits a corresponding ⁇ ly high level of noise. It is the object of the invention to present a configuration for a windmill wing which reduces the level of noise emitted.
  • a windmill wing of the kind presented in the preamble in that said wing according to the invention is characteristic in that the angle between the rotor plane and the chord in a given cross-section of the wing at its extremity is set in such a way that the lift on the wing's extremity is limited or moves towards 0 at the tip.
  • the extremity of the wing comprises with advantage the radially outer 15-20% of the wing's total length.
  • figs, la, b and c respectively show a windmill wing seen at right angles to the wing's plane of rotation, tangentially in this plane and at right angles to the wing's longitudinal axis and radially from the outside inwards in said plane, and fig. 2 shows a random cross-section of the wing depicted in fig. 1.
  • a windmill wing 1 of which the radially outer end 2 in the position of use of the windmill wing 1 constitutes the so-called wing tip.
  • the windmill wing 1 In relation to its direction of rotation, the windmill wing 1 has a substantially straight front edge 3 and an opposite rear edge 4 which extends in a substantially inclined manner forwardly and outwardly towards the wing tip 2, so that the breadth of the wing seen at right angles in to ⁇ wards the rotor plane decreases outwardly.
  • the wing 1 has a relatively flat side 5, the so-called wind or pressure side, and a relatively curved side 6 which forms the wing's suction side.
  • the reference figure 7 indicates the chord in a random cross-section of the wing 1
  • the reference figure 8 indicates the rotor plane for the wing or for the wind rotor.
  • the chord 7 forms an angle ⁇ with the rotor plane 8, and with the known wing 1 the size of this angle diminishes with increasing distance from the rotor axis, so that the angle ⁇ at the wing tip 2 is 0.
  • the dot-and-dash lines indicate nine different cross-sections in the wing 1, in that the radial distance of the cross-sections from the rotor axis will be seen in the following tables 1 and 2, which respectively show some related conditions for the individual sections of a known wing which is marketed under the designation Aerostar 9 m, and for a wing according to the present invention.
  • c indicates the breadth of the wing 1 for each of the given radii
  • t indicates the thickness of the wing in relation to the chord 7 at the relevant radius
  • ⁇ indicates the angle which the chord in the relevant cross-section forms with the wind rotor's plane of rotation.

Abstract

Afin de répondre aux exigences astreignantes concernant le bruit causé par les moulins à vent, on a mis au point une pale (1) pour moulins à vent, ayant une configuration traditionnelle dans la zone comprise entre l'emplanture et un point situé à une certaine distance de l'extrémité (2), c'est-à-dire que cette pale a un angle d'avance optimisé (alpha) sous des conditions normales de fonctionnement. En revanche, l'extrémité extérieure (2) de ladite pale présente un angle (alpha) tel que la sustentation est aussi proche que possible de zéro dans des conditions normales de fonctionnement. En réalité, cela signifie que l'extrémité (2) présente un gauchissement négatif par rapport au reste de la pale (1) de sorte que la différence de pression entre le côté de refoulement (5) et l'extrados (6) de l'extrémité (2) de la pale est réduite, que le tourbillon à l'extrémité est réduit, et que le bruit causé par ladite pale (1) est sensiblement atténué.
PCT/DK1991/000201 1990-07-11 1991-07-11 Pale pour moulin a vent WO1992001156A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK167690A DK164925B (da) 1990-07-11 1990-07-11 Vinge til en vindmoelle
DK1676/90 1990-07-11

Publications (1)

Publication Number Publication Date
WO1992001156A1 true WO1992001156A1 (fr) 1992-01-23

Family

ID=8107119

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1991/000201 WO1992001156A1 (fr) 1990-07-11 1991-07-11 Pale pour moulin a vent

Country Status (3)

Country Link
AU (1) AU8234691A (fr)
DK (1) DK164925B (fr)
WO (1) WO1992001156A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265672A (en) * 1992-03-18 1993-10-06 Advanced Wind Turbines Inc Wind turbine blade
EP2000665A2 (fr) * 2006-03-29 2008-12-10 Gamesa Innovation & Technology, S.L. Éolienne anti-bruit
WO2010033018A2 (fr) * 2008-09-19 2010-03-25 Cortenergy Bv Eolienne dotée d'extrémités à faible induction
EP2187045A1 (fr) * 2007-11-19 2010-05-19 Mitsubishi Heavy Industries, Ltd. Aube d'éolienne et aérogénérateur l'utilisant
WO2011077128A1 (fr) * 2009-12-24 2011-06-30 Tidal Generation Limited Ensembles turbines
EP2128435A3 (fr) * 2008-05-30 2013-08-21 General Electric Company Aube d'éolienne avec l'extrémité tordue
US10060274B2 (en) 2012-03-13 2018-08-28 Corten Holding Bv Twisted blade root
EP3453872A1 (fr) * 2017-09-07 2019-03-13 General Electric Company Procédés permettant d'atténuer le bruit pendant des conditions de vitesse du vent élevée d'éoliennes
EP3763937A1 (fr) * 2019-07-11 2021-01-13 FlowGen Development & Management GmbH Pale de rotor pour une éolienne et éolienne
US11781522B2 (en) 2018-09-17 2023-10-10 General Electric Company Wind turbine rotor blade assembly for reduced noise

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297076A (en) * 1979-06-08 1981-10-27 Lockheed Corporation Wind turbine
SE442659B (sv) * 1984-01-13 1986-01-20 Stubinen Utvecklings Ab Vindrotorelement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297076A (en) * 1979-06-08 1981-10-27 Lockheed Corporation Wind turbine
SE442659B (sv) * 1984-01-13 1986-01-20 Stubinen Utvecklings Ab Vindrotorelement

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265672A (en) * 1992-03-18 1993-10-06 Advanced Wind Turbines Inc Wind turbine blade
GB2265672B (en) * 1992-03-18 1995-11-22 Advanced Wind Turbines Inc Wind turbines
EP2000665A2 (fr) * 2006-03-29 2008-12-10 Gamesa Innovation & Technology, S.L. Éolienne anti-bruit
EP2000665A4 (fr) * 2006-03-29 2013-05-15 Gamesa Innovation & Tech Sl Éolienne anti-bruit
EP2187045A4 (fr) * 2007-11-19 2013-01-02 Mitsubishi Heavy Ind Ltd Aube d'éolienne et aérogénérateur l'utilisant
US8851857B2 (en) 2007-11-19 2014-10-07 Mitsubishi Heavy Industries, Ltd Wind turbine blade and wind power generator using the same
EP2187045A1 (fr) * 2007-11-19 2010-05-19 Mitsubishi Heavy Industries, Ltd. Aube d'éolienne et aérogénérateur l'utilisant
EP2128435A3 (fr) * 2008-05-30 2013-08-21 General Electric Company Aube d'éolienne avec l'extrémité tordue
CN102187092A (zh) * 2008-09-19 2011-09-14 考特能源有限公司 带低进气顶端的风力涡轮机
WO2010033018A2 (fr) * 2008-09-19 2010-03-25 Cortenergy Bv Eolienne dotée d'extrémités à faible induction
WO2010033018A3 (fr) * 2008-09-19 2011-02-24 Cortenergy Bv Eolienne dotée d'extrémités à faible induction
US9797368B2 (en) 2008-09-19 2017-10-24 Cortenergy Bv Wind turbine with low induction tips
WO2011077128A1 (fr) * 2009-12-24 2011-06-30 Tidal Generation Limited Ensembles turbines
US10060274B2 (en) 2012-03-13 2018-08-28 Corten Holding Bv Twisted blade root
EP3453872A1 (fr) * 2017-09-07 2019-03-13 General Electric Company Procédés permettant d'atténuer le bruit pendant des conditions de vitesse du vent élevée d'éoliennes
US11781522B2 (en) 2018-09-17 2023-10-10 General Electric Company Wind turbine rotor blade assembly for reduced noise
EP3763937A1 (fr) * 2019-07-11 2021-01-13 FlowGen Development & Management GmbH Pale de rotor pour une éolienne et éolienne
WO2021004853A1 (fr) * 2019-07-11 2021-01-14 Flowgen Development & Management Gmbh Pale de rotor pour éolienne et éolienne
US11913426B2 (en) 2019-07-11 2024-02-27 FlowGen Development & Management AG Rotor blade for a wind turbine and wind turbine

Also Published As

Publication number Publication date
DK164925B (da) 1992-09-07
AU8234691A (en) 1992-02-04
DK167690A (da) 1992-01-12
DK167690D0 (da) 1990-07-11

Similar Documents

Publication Publication Date Title
JP5180164B2 (ja) 風力発電装置のローターブレード
JP4504808B2 (ja) 風力発電装置
US8241002B2 (en) Rotor blade for a wind power plant
JP2005533210A5 (fr)
US4531890A (en) Centrifugal fan impeller
JP3896169B2 (ja) タービンブレード
KR101787294B1 (ko) 풍력 발전 설비의 로터 블레이드 그리고 풍력 발전 설비
JP2005528557A (ja) 改良されたタービン
CA2524208A1 (fr) Pale de rotor d'une installation a energie eolienne
WO1986001263A1 (fr) Soufflante de haute resistance
EP3066336A1 (fr) Pale de rotor d'une éolienne
WO1992001156A1 (fr) Pale pour moulin a vent
JPH03138404A (ja) 蒸気タービン用の羽根
EP3453872B1 (fr) Procédés permettant d'atténuer le bruit pendant des conditions de vitesse du vent élevée d'éoliennes
EP3853470B1 (fr) Ensemble pale de rotor d'éolienne de réduction de bruit
US8517690B2 (en) Double leading edge airfoil for wind turbine blade root
CN109563804B (zh) 带有尖端锯齿的风力涡轮机叶片
EP0553598B1 (fr) Ventilateur avec pales convexes
WO1989012174A1 (fr) Aube directrice pour soufflante axiale
CN116157597A (zh) 风力涡轮机
JP2004183640A (ja) フラップを具備する風車ブレード
US20220082077A1 (en) Rotor blade for a wind turbine
US11913426B2 (en) Rotor blade for a wind turbine and wind turbine
US20210372364A1 (en) Wind turbine rotor blade assembly for reduced noise
KR100326997B1 (ko) 축류팬

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR CA CH CS DE DK ES FI GB HU JP KP KR LK LU MC MG MW NL NO PL RO SD SE SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU ML MR NL SE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA