DE19614420C2 - Rotor blade and wind turbine with a rotor blade - Google Patents
Rotor blade and wind turbine with a rotor bladeInfo
- Publication number
- DE19614420C2 DE19614420C2 DE19614420A DE19614420A DE19614420C2 DE 19614420 C2 DE19614420 C2 DE 19614420C2 DE 19614420 A DE19614420 A DE 19614420A DE 19614420 A DE19614420 A DE 19614420A DE 19614420 C2 DE19614420 C2 DE 19614420C2
- Authority
- DE
- Germany
- Prior art keywords
- rotor blade
- wind turbine
- trailing edge
- rotor
- 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.)
- Expired - Lifetime
Links
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000013475 authorization Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
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
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 Wohngebäu den aufgestellt wird. Die mit einer Windenergieanlage, bzw. einem Windenergie konverter bislang sich einstellenden Schallemissionen führen auch dazu, dass Windenergieanlagen aufgrund der Lärmentstehung Widerstände aus breiten Be völkerungskreisen 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 liable Many rotor blades have the problem that they are to a considerable extent at operation of the wind turbine and at wind speeds from 5-6 m / sec not un generate considerable noise emissions, which is particularly noise protection reasons then uncomfortable is when the wind turbine near residential building which is set up. The with a wind turbine, or a wind energy Converters so far adjusting sound emissions also lead to Wind turbines due to the generation of noise Resistances from broad Be This is partly the reason why populations are confronted with these facilities difficult or impossible to enforce, because the approval authorities because of the existing environmental regulations - also noise is one of the environmental pollution - the Refuse authorization of wind turbines.
Aus EP 0 652 367 A1 ist bekannt, für eine Windenergieanlage ein oder mehrere Rotorblätter vorzusehen, deren Hinterkanten gezackt und somit ungleichmäßig ausgebildet sind. Die Ausbildung einer solchen Hinterkante ist jedoch sehr kompli ziert und führt zu einer Leistungsverminderung des gesamten Rotorblatts. Außer dem treten an den scharfkantigen Zacken der Rotorblatthinterkante dann Schäden besonders auf, wenn einmal ein Blitz in das Rotorblatt an dieser Stelle einschlagen sollte, weil die mit einem Blitz einhergehende elektrischen Ladungen nur über einen sehr geringen Durchmesser des Rotorblatts abgeführt werden können.From EP 0 652 367 A1 it is known for a wind turbine one or more To provide rotor blades whose serrated edges jagged and thus uneven are formed. The formation of such a trailing edge is very compli graces and leads to a reduction in performance of the entire rotor blade. except The damage occurs at the sharp-edged points of the rotor blade trailing edge especially when a lightning strike in the rotor blade at this point should, because the electrical charges associated with a lightning only over one very small diameter of the rotor blade can be dissipated.
Es ist daher Aufgabe der Erfindung, mit einfachen Mitteln die Schallemissionen von Windenergieanlagen zu verringern und dabei die Nachteile im Stand der Technik zu vermeiden.It is therefore an object of the invention, with simple means the sound emissions of wind turbines and thereby reducing the disadvantages in the state of Technology to avoid.
Dieses Ziel wird erfindungsgemäß mit einem Windenergieanlagen-Rotorblatt mit dem Merkmal nach Anspruch 1 erreicht. Vorteilhafte Weiterbildungen sind in den Unteransprüchen beschrieben.This object is achieved according to the invention with a wind turbine rotor blade achieved the feature of claim 1. Advantageous developments are in the Subclaims described.
Erfindungsgemäß wird vorgeschlagen, dass im Bereich der Rotorblatt-Hinterkante eines Rotors eine den Querschnitt des Rotorblatts verringernde Abstufung ange ordnet ist; vorzugsweise ist die Abstufung sowohl auf der Druck- als auch auf der Saugseite der Hinterkante des Rotorblattes vorsehen.According to the invention, it is proposed that in the region of the rotor blade trailing edge a rotor reducing the cross-section of the rotor blade reducing gradation is order; Preferably, the gradation is on both the pressure and the Provide suction side of the trailing edge of the rotor blade.
Die erfindungsgemäße Maßnahme hat zur Folge, dass anders als bei der her kömmlichen Lösung - siehe Fig. 1 -, bei der die Luftströmungen der Druck- und Saugseite an der Blatthinterkante ungehindert zusammentreffen, bei dem erfin dungsgemäßen Rotorblatt die Strömungen durch die Stufen verwirbelt werden - siehe Fig. 2 - und erst dann diffus und mit geringerer Geschwindigkeit zusammen treffen.The measure according to the invention has the consequence that, unlike the conventional solution ago - see Fig. 1 -, in which the air flows of the pressure and suction side meet at the blade trailing edge unhindered, in the inventions to the invention rotor blade, the currents are swirled through the stages - see Fig. 2 - and only then meet diffusely and at a lower speed together.
Bei ersten Versuchen im Windkanal wurde eine deutliche Minderung des Ge räuschpegels festgestellt. Bei diesen Versuchen betrug die Abstufungstiefe ca. 2 mm und die Abstufung selbst war etwa 15 mm von der Rotorblatthinterkante entfernt.In the first experiments in the wind tunnel, a significant reduction of the Ge detected noise levels. In these experiments, the gradation depth was about 2 mm and the gradation itself was about 15 mm from the rotor blade trailing edge away.
Die erfindungsgemäßen Maßnahmen können sehr leicht in der Rotorblattprodukti on umgesetzt werden und haben keine Minderung der Rotorblattleistung zur Folge.The inventive measures can very easily in the Rotorblattprodukti be implemented on and have no reduction in the rotor blade performance result.
Die Erfindung wird nachfolgend anhand eines zeichnerisch dargestellten Ausfüh rungsbeispiels näher erläutert. In der Zeichnung stellen dar:The invention will be described below with reference to a drawing explained in more detail. In the drawing represent:
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 Ro torblatt 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 auf einander 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 Ro torblatt 1 has a pressure side 2 and a suction side 3 . Both pressure and suction side are swept by corresponding air flows 4 and 5 . In the area of the rotor blade trailing edge 6 , these flows impinge unhindered on each other and produce - as the motion vectors have a certain amount - a not inconsiderable sound emission in the frequency range of 1000 to 4000 Hz. This noise emission can be very disturbing for people who are in near a wind turbine and are exposed to the sound emission continuously.
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 eingelas sen 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 Luft strömungen treffen bei Verlassen der Rotorblatthinterkante diffus und mit verringer ter Geschwindigkeit aufeinander. Die dann noch entstehenden Schallemissionen verfügen über einen erheblich geringeren Schallpegel, als bei bekannten Rotorblät tern. In Fig. 2, an inventive rotor blade is shown in cross section, in which in 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 1 gradations 7 and 8 are eingelas sen in the rotor blade, which reduce the cross section of the rotor blade , The gradations are exaggerated in the example shown to better show the fluidic Verwirbelungseffekt. If the air flow on one side of the rotor blade to the gradation, it is swirled there and meet the turbulent air flows when leaving the rotor blade trailing edge diffuse and with reduced ter speed on each other. The then resulting sound emissions have a much lower sound level, as in known Rotorblät tern.
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 achieved even if the gradation only on one side of the rotor blade is provided. The best measurements in one Wind tunnel could be achieved, however, if the gradations in the Rotor blade trailing edge were embedded on both sides of the rotor blade.
Claims (4)
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)
Publication Number | Publication Date |
---|---|
DE19614420A1 DE19614420A1 (en) | 1997-10-16 |
DE19614420C2 true DE19614420C2 (en) | 2003-05-22 |
Family
ID=7791046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19614420A Expired - Lifetime DE19614420C2 (en) | 1996-04-12 | 1996-04-12 | Rotor blade and wind turbine with a rotor blade |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19614420C2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10244022A1 (en) * | 2002-09-21 | 2004-04-01 | 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 |
DE102005051931A1 (en) * | 2005-10-29 | 2007-05-03 | Nordex Energy Gmbh | Rotor blade for wind turbines |
Families Citing this family (13)
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 |
EP1141543B2 (en) | 1998-12-09 | 2013-11-20 | Aloys Wobben | Rotor blade of a wind turbine |
FR2802579B1 (en) * | 1999-12-21 | 2002-06-14 | Jeumont Ind | BLADE OF A CENTRIFUGAL MACHINE AND METHOD FOR ADJUSTING BLADE PERFORMANCE |
GR1003999B (en) * | 2001-08-29 | 2002-09-19 | Πετρου Νικολαος Παπαγεωργιου | Force-generating method with the use of foils (db). |
BR0317775B1 (en) | 2003-01-02 | 2012-10-02 | rotor blade tip for a rotor blade, rotor blade, and wind power installation. | |
EP2031242A1 (en) | 2007-08-29 | 2009-03-04 | Lm Glasfiber A/S | A blade element for mounting on a wind turbine blade and a 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 |
DE102012000376B4 (en) * | 2012-01-12 | 2013-08-14 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Axial or diagonal fan |
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 |
EP3717769A1 (en) * | 2017-12-01 | 2020-10-07 | Vestas Wind Systems A/S | Wind turbine blade |
Citations (8)
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 |
-
1996
- 1996-04-12 DE DE19614420A patent/DE19614420C2/en not_active Expired - Lifetime
Patent Citations (8)
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 (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10244022A1 (en) * | 2002-09-21 | 2004-04-01 | Aloys Wobben | rotor blade |
DE10244022B4 (en) * | 2002-09-21 | 2005-03-10 | Aloys Wobben | rotor blade |
US7311490B2 (en) | 2002-09-21 | 2007-12-25 | Aloys Wobben | Rotor blade with an electrical field |
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 |
DE102005051931A1 (en) * | 2005-10-29 | 2007-05-03 | Nordex Energy Gmbh | Rotor blade for wind turbines |
DE102005051931B4 (en) * | 2005-10-29 | 2007-08-09 | Nordex Energy Gmbh | Rotor blade for wind turbines |
Also Published As
Publication number | Publication date |
---|---|
DE19614420A1 (en) | 1997-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
8304 | Grant after examination procedure | ||
8364 | No opposition during term of opposition | ||
R071 | Expiry of right |