WO2010000007A2 - Rotor blade for a darrieus rotor - Google Patents

Rotor blade for a darrieus rotor Download PDF

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Publication number
WO2010000007A2
WO2010000007A2 PCT/AT2009/000263 AT2009000263W WO2010000007A2 WO 2010000007 A2 WO2010000007 A2 WO 2010000007A2 AT 2009000263 W AT2009000263 W AT 2009000263W WO 2010000007 A2 WO2010000007 A2 WO 2010000007A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor blade
rotor
axis
rotation
leading edge
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.)
Ceased
Application number
PCT/AT2009/000263
Other languages
German (de)
French (fr)
Other versions
WO2010000007A3 (en
Inventor
Dietmar Fuchs
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.)
SILENT FUTURE TEC GmbH
Original Assignee
SILENT FUTURE TEC GmbH
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 SILENT FUTURE TEC GmbH filed Critical SILENT FUTURE TEC GmbH
Priority to EP09771830A priority Critical patent/EP2297457A2/en
Publication of WO2010000007A2 publication Critical patent/WO2010000007A2/en
Publication of WO2010000007A3 publication Critical patent/WO2010000007A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/06—Rotors
    • F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
    • 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
    • F05B2240/21—Rotors for wind turbines
    • F05B2240/211—Rotors for wind turbines with vertical axis
    • F05B2240/214—Rotors for wind turbines with vertical axis of the Musgrove or "H"-type
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/912—Mounting on supporting structures or systems on a stationary structure on a tower
    • 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
    • F05B2250/70—Shape
    • F05B2250/71—Shape curved
    • 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
    • Y02E10/728—Onshore wind turbines
    • 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

Definitions

  • the invention relates to a rotor blade for a Darrieus rotor in H-construction for a wind turbine.
  • a Darrieus rotor is a wind turbine by which kinetic energy of the air flowing as wind is converted into kinetic energy of a rotor, wherein the axis of rotation of the rotor is substantially normal to the direction of flow of the wind.
  • Wind turbines with a Darrieus rotor are inexpensive and robust and especially for small plants, which can be placed, for example, on building roofs, advantageous because they work well even with frequently changing wind directions.
  • In the H-construction of a Darrieus rotor two at least approximately in the vertical direction extending rotor blades are connected and held together by at least one connecting strut.
  • the connecting strut is rotatably mounted about a vertical axis in its longitudinal center.
  • a typical in the essential areas of construction for a wind turbine with Darrieus rotor in H-construction is shown in DE 20 2007 010 873 Ul.
  • the profile cross-sectional shape of a lance rotor blade which is normal to the axis of rotation is approximately equal to an airfoil profile.
  • Darrieus rotors tend to vibrate, that they require a relatively strong wind to start and that they can cause strong noises.
  • the object underlying the invention is to provide a rotor blade for a Darrieus rotor in H-type, which is improved in terms of noise and start-up characteristics over known designs.
  • the upper and lower ends of the rotor blades with respect to the remaining rotor blade slightly bent away from the rotor axis outwardly form and the o- beren and lower part of the leading edge of the rotor blades in the direction of operational movement relative to the central part of the Curve the leading edge slightly to the rear.
  • Fig. 1 shows an exemplary Darrieus rotor in oblique view.
  • Fig. 2 shows a rotor blade of the rotor of Fig. L, wherein the viewing direction is equal to the direction of movement of the rotor blade, which rotates about a left of the rotor blade arranged, vertical axis.
  • Fig. 3 shows a rotor blade of the rotor of Fig. 1, wherein the viewing direction is directed radially to the rotor axis.

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)
  • Rotary Pumps (AREA)

Abstract

The invention relates to a rotor blade for a Darrieus H rotor. The aim of the invention is to reduce the noise produced by the rotor and to improve its starting properties. The upper and lower ends of the rotor blades are therefore bent outward and away from the rotor axis to some extent in relation to the rest of the rotor blade and the upper and lower sections of the leading edge of the rotor blades are bent backward to some extent in the direction of movement when in operation in relation to the center section of the leading edge.

Description

Rotorblatt für einen Darrieus-RotorRotor blade for a Darrieus rotor

Die Erfindung betrifft ein Rotorblatt für einen Darrieus-Rotor in H-Bauweise für eine Windenergieanlage.The invention relates to a rotor blade for a Darrieus rotor in H-construction for a wind turbine.

Ein Darrieus-Rotor ist eine Windkraftmaschine, durch welche Bewegungsenergie der als Wind strömenden Luft in Bewegungsenergie eines Rotors umgewandelt wird, wobei die Drehachse des Rotors im wesentlichen normal zur Strömungsrichtung des Windes liegt. Windkraftanlagen mit einem Darrieus-Rotor sind kostengünstig und robust und vor allem für Kleinanlagen, welche beispielsweise auf Gebäudedächern aufgestellt sein können, von Vorteil, da sie auch bei häufig wechselnden Windrichtungen gut funktionieren. Bei der H-Bauweise eines Darrieus-Rotors sind zwei sich zumindest annähernd in vertikaler Richtung erstreckende Rotorblätter durch mindestens eine Verbindungsstrebe miteinander verbunden und gehalten. Die Verbindungsstrebe ist in ihrer Längsmitte um eine vertikale Achse drehbar gelagert. Eine in den wesentlichen Bereichen typische Bauweise für eine Windkraftanlage mit Darrieus-Rotor in H-Bauweise ist in der DE 20 2007 010 873 Ul gezeigt. Die normal zur Rotationsachse liegende Profilquerschnittsform eines Darrie- us-Rotorblattes ist etwa gleich einem Tragflächenprofil.A Darrieus rotor is a wind turbine by which kinetic energy of the air flowing as wind is converted into kinetic energy of a rotor, wherein the axis of rotation of the rotor is substantially normal to the direction of flow of the wind. Wind turbines with a Darrieus rotor are inexpensive and robust and especially for small plants, which can be placed, for example, on building roofs, advantageous because they work well even with frequently changing wind directions. In the H-construction of a Darrieus rotor two at least approximately in the vertical direction extending rotor blades are connected and held together by at least one connecting strut. The connecting strut is rotatably mounted about a vertical axis in its longitudinal center. A typical in the essential areas of construction for a wind turbine with Darrieus rotor in H-construction is shown in DE 20 2007 010 873 Ul. The profile cross-sectional shape of a lance rotor blade which is normal to the axis of rotation is approximately equal to an airfoil profile.

Problematisch an Darrieus-Rotoren ist, dass sie zum Vibrieren neigen, dass sie einen relativ starken Wind zum Starten brauchen und dass sie starke Geräusche hervorrufen können.The problem with Darrieus rotors is that they tend to vibrate, that they require a relatively strong wind to start and that they can cause strong noises.

Die der Erfindung zu Grunde liegende Aufgabe besteht darin, eine Rotorblattform für einen Darrieus-Rotor in H-Bauweise bereitzustellen, welche bezüglich Geräuschentwicklung und Anlaufeigenschaften gegenüber bekannten Bauformen verbessert ist.The object underlying the invention is to provide a rotor blade for a Darrieus rotor in H-type, which is improved in terms of noise and start-up characteristics over known designs.

Zum Lösen der Aufgabe ist vorgesehen, die oberen und unteren Enden der Rotorblätter gegenüber dem restlichen Rotorblatt etwas von der Rotorachse weg nach außen gebogen auszubilden und den o- beren und unteren Teil der Anströmkante der Rotorblätter in der Richtung der betriebsmäßigen Bewegung gegenüber dem mittleren Teil der Anströmkante etwas nach hinten zu krümmen.To solve the problem is provided, the upper and lower ends of the rotor blades with respect to the remaining rotor blade slightly bent away from the rotor axis outwardly form and the o- beren and lower part of the leading edge of the rotor blades in the direction of operational movement relative to the central part of the Curve the leading edge slightly to the rear.

Die Erfindung wird an Hand von zwei Prinzipskizzen veranschaulicht:The invention is illustrated by two schematic diagrams:

Fig. 1: zeigt einen beispielhaften Darrieus-Rotor in Schrägrissansicht . Fig. 2: zeigt ein Rotorblatt des Rotors von Fig. l, wobei die Blickrichtung gleich der Bewegungsrichtung des Rotorblattes ist, welches um eine links vom Rotorblatt angeordnete, vertikale Achse rotiert.Fig. 1: shows an exemplary Darrieus rotor in oblique view. Fig. 2: shows a rotor blade of the rotor of Fig. L, wherein the viewing direction is equal to the direction of movement of the rotor blade, which rotates about a left of the rotor blade arranged, vertical axis.

Fig. 3: zeigt ein Rotorblatt des Rotors von Fig. 1, wobei die Blickrichtung radial auf die Rotorachse zu gerichtet ist.Fig. 3: shows a rotor blade of the rotor of Fig. 1, wherein the viewing direction is directed radially to the rotor axis.

Durch die dargestellte Form des Rotorblattes werden gute Anlaufeigenschaften und geringe Geräuschentwicklung erreicht. The illustrated shape of the rotor blade good start-up properties and low noise are achieved.

Claims

Patentansprüche claims 1. Rotorblatt für einen Darrieus-Rotor in H-Bauweise für eine Windenergieanlage, dadurch gekennzeichnet, dass die der Rotationsachse zugewandte Kontur des Rotorblattes (1) über die Höhe des Rotorblattes zwei lokale Minimalwerte der Entfernung zur Rotorachse aufweist, dass diese Minimalwerte jeweils in 3 % bis 20 %, vorzugsweise 4 % bis 8 % der Gesamthöhe von der oberen bzw. unteren Spitze des Rotorblattes entfernt liegen, dass sich besagte Kontur von den Stellen minimaler Entfernung zur Rotorachse aus zur näherliegenden Spitze des Rotorblattes hin von der Rotorachse weg krümmt und dass die Anströmkante des Rotorblattes an ihrem oberen und an ihrem unteren Ende gegenüber dem dazwischenliegenden Teil bezüglich der betriebsmäßigen Bewegung des Rotorblattes nach hinten gekrümmt ist, wobei die Anströmkante in jeweils einem Höhenbereich von 6 % bis 25 %, vorzugsweise 10 % bis 15 % ihrer Gesamthöhe um 50 % bis 75 %, vorzugsweise 60 % bis 70 % der in betriebsmäßiger Bewegungsrichtung gemessenen Gesamtbreite entgegen der betriebsmäßigen Bewegungsrichtung des Rotorblattes zurückweicht.1. rotor blade for a Darrieus rotor in H-construction for a wind turbine, characterized in that the axis of rotation facing contour of the rotor blade (1) over the height of the rotor blade has two local minimum values of the distance to the rotor axis, that these minimum values in each case in % to 20%, preferably 4% to 8% of the total height of the upper and lower tip of the rotor blade are removed that said contour of the points of minimum distance to the rotor axis from the closer tip of the rotor blade curves away from the rotor axis and that the leading edge of the rotor blade at its upper and at its lower end relative to the intermediate part with respect to the operational movement of the rotor blade is curved backwards, wherein the leading edge in each case a height range of 6% to 25%, preferably 10% to 15% of their total height 50% to 75%, preferably 60% to 70% of the operational movement Direction measured total width against the operational direction of movement of the rotor blade recedes. 2. Rotorblatt nach Anspruch 1, dadurch gekennzeichnet, dass die Spitzen des Rotorblattes (1) um 15 % bis 40 %, vorzugsweise 20 % bis 30 % der gesamten radialen Breite des Rotorblattes weiter von der Rotationsachse entfernt liegen, als die der Rotationsachse am nächsten liegenden Punkte des Rotorblattes.2. Rotor blade according to claim 1, characterized in that the tips of the rotor blade (1) by 15% to 40%, preferably 20% to 30% of the total radial width of the rotor blade are further away from the axis of rotation than that of the axis of rotation nearest lying points of the rotor blade. 3. Rotorblatt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass in der Projektion in Radialrichtung der Rotationsbewegung die Anströmkante in ihrem gesamten Längenverlauf durchgehend im gleichen Sinn gekrümmt ist und dass die gegenüberliegende Kante (Abströmkante) an den Endbereichen im gleichen Sinn wie die Anströmkante gekrümmt ist und im dazwischenliegenden Längenbereich entgegengesetzt.3. Rotor blade according to claim 1 or 2, characterized in that in the projection in the radial direction of the rotational movement, the leading edge is curved throughout in the same length throughout the same sense and that the opposite edge (trailing edge) curved at the end in the same sense as the leading edge is opposite and in the intermediate length range. 4. Rotorblatt nach einem der bisherigen Ansprüche, dadurch gekennzeichnet, dass die der Rotationsachse abgewandte Kontur im mittleren Höhenbereich am weitesten von der Rotationsachse entfernt liegt, sich mit steigender Entfernung von der Höhenmitte erst an die Rotationsachse annähert und dann zum oberen und zum unteren Ende hin wieder von der Rotationsachse entfernt. 4. Rotor blade according to one of the preceding claims, characterized in that the axis of rotation remote from the contour in the middle height range furthest away from the axis of rotation, with increasing distance from the center of elevation approaches only to the axis of rotation and then to the upper and lower end again away from the axis of rotation.
PCT/AT2009/000263 2008-07-03 2009-07-03 Rotor blade for a darrieus rotor Ceased WO2010000007A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09771830A EP2297457A2 (en) 2008-07-03 2009-07-03 Rotor blade for a darrieus rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0037108U AT11093U1 (en) 2008-07-03 2008-07-03 ROTOR BLADE FOR A DARRIEUS ROTOR
ATGM371/2008 2008-07-03

Publications (2)

Publication Number Publication Date
WO2010000007A2 true WO2010000007A2 (en) 2010-01-07
WO2010000007A3 WO2010000007A3 (en) 2010-12-16

Family

ID=41051985

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Application Number Title Priority Date Filing Date
PCT/AT2009/000263 Ceased WO2010000007A2 (en) 2008-07-03 2009-07-03 Rotor blade for a darrieus rotor

Country Status (4)

Country Link
EP (1) EP2297457A2 (en)
AT (1) AT11093U1 (en)
DE (1) DE202009009188U1 (en)
WO (1) WO2010000007A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136603A1 (en) 2011-04-04 2012-10-11 F. Hoffmann-La Roche Ag 1,4-oxazepines as bace1 and/or bace2 inhibitors
CN108050001A (en) * 2017-11-08 2018-05-18 西安理工大学 A kind of bionic blade of the vertical-axis tide energy hydraulic turbine
GB2606390A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130380A (en) * 1976-05-13 1978-12-19 Kaiser Heinz W Wind powered turbine and airfoil construction
GB2082260B (en) * 1980-08-20 1984-01-25 Nianbilla Co Ltd Vertical axis windmill
DE3425313A1 (en) * 1984-07-10 1986-01-23 Erich Herter Wind turbine
FR2865777B1 (en) * 2004-02-04 2006-05-05 Inst Nat Polytech Grenoble HYDRAULIC TURBOMACHINE
DE202007010873U1 (en) 2007-08-03 2007-10-04 Fiber-Tech Products Gmbh Wind power machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136603A1 (en) 2011-04-04 2012-10-11 F. Hoffmann-La Roche Ag 1,4-oxazepines as bace1 and/or bace2 inhibitors
CN108050001A (en) * 2017-11-08 2018-05-18 西安理工大学 A kind of bionic blade of the vertical-axis tide energy hydraulic turbine
CN108050001B (en) * 2017-11-08 2019-09-27 西安理工大学 A bionic blade of a vertical axis tidal energy turbine
GB2606390A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606490A (en) * 2021-05-06 2022-11-09 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606390B (en) * 2021-05-06 2023-06-07 Achelous Energy Ltd Systems and devices for a floating renewable power station
GB2606490B (en) * 2021-05-06 2023-12-06 Achelous Energy Ltd Systems and devices for a floating renewable power station

Also Published As

Publication number Publication date
AT11093U1 (en) 2010-04-15
WO2010000007A3 (en) 2010-12-16
EP2297457A2 (en) 2011-03-23
DE202009009188U1 (en) 2009-09-03

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