DE102005019905A1 - Rotor blade for power generating wind turbine has porous material on blade tip with regular structure or foam structure to allow drainage of condensation from inside hollow blade - Google Patents
Rotor blade for power generating wind turbine has porous material on blade tip with regular structure or foam structure to allow drainage of condensation from inside hollow blade Download PDFInfo
- Publication number
- DE102005019905A1 DE102005019905A1 DE102005019905A DE102005019905A DE102005019905A1 DE 102005019905 A1 DE102005019905 A1 DE 102005019905A1 DE 102005019905 A DE102005019905 A DE 102005019905A DE 102005019905 A DE102005019905 A DE 102005019905A DE 102005019905 A1 DE102005019905 A1 DE 102005019905A1
- Authority
- DE
- Germany
- Prior art keywords
- rotor blade
- blade
- porous
- porous material
- porous surface
- 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
Links
- 239000011148 porous material Substances 0.000 title claims abstract description 30
- 239000006260 foam Substances 0.000 title claims description 7
- 230000005494 condensation Effects 0.000 title 1
- 238000009833 condensation Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000006261 foam material Substances 0.000 abstract 1
- 206010013710 Drug interaction Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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
-
- 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
- F05B2240/307—Blade tip, e.g. winglets
-
- 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
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
-
- 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
Description
Die vorliegende Erfindung betrifft ein Rotorblatt für eine Windenergieanlage.The The present invention relates to a rotor blade for a wind turbine.
Der von einer Windenergieanlage abgestrahlte Lärm wird in ganz erheblichem Umfang von den Strömungsgeräuschen an den Rotorblättern bestimmt. Die Strömungsgeräusche steigen mit wachsender Geschwindigkeit stark an, so daß ein wesentlicher Faktor für die Lärmerzeugung die Geometrie und das Material der Rotorblattspitze ist. Experimentelle Untersuchungen haben ergeben, daß für die Lärmentstehung an dem Rotorblatt im wesentlichen drei Ursachen verantwortlich sind:
- – Wechselwirkung von atmosphärischer Turbulenz mit der Blattoberfläche und der Anströmkante,
- – turbulente Abströmung von der Blatthinterkante und
- – Wechselwirkung des Blattspitzenwirbels mit der Blattoberfläche.
- Interaction of atmospheric turbulence with the leaf surface and the leading edge,
- - Turbulent outflow from the leaf trailing edge and
- - Interaction of the leaf tip vortex with the leaf surface.
Aus
Der Erfindung liegt die Aufgabe zugrunde ein Rotorblatt bereitzustellen, das mit einfachen Mitteln zu einer Schallreduzierung im Betrieb der Windenergieanlage führt.Of the Invention has for its object to provide a rotor blade, the simple means to reduce noise during operation the wind turbine leads.
Erfindungsgemäß wird die Aufgabe durch ein Rotorblatt mit den Merkmalen aus Anspruch 1 gelöst. Vorteilhafte Ausgestaltung bilden die Gegenstände der Unteransprüche.According to the invention Problem solved by a rotor blade with the features of claim 1. advantageous Design form the objects the dependent claims.
Das erfindungsgemäße Rotorblatt für eine Windenergieanlage besitzt mindestens in einem Bereich eine porige Oberfläche zur Lärmreduzierung. Die porige Oberfläche auf dieser Außenwand des Rotorblatts schafft besonders günstige Strömungsverhältnisse, die zu einer deutlich reduzierten Schallemission führen. In einer bevorzugten Ausgestaltung ist für den Bereich der porigen Oberfläche ein poröses Material hergestellt. Es wird also zur Erzeugung der porigen Oberfläche ein Material verwendet, das eine porige Oberfläche besitzt.The Rotor blade according to the invention for a wind turbine has at least in one area a porous surface to Noise reduction. The porous surface on this outer wall of the rotor blade creates particularly favorable flow conditions, which significantly lead to reduced noise emission. In a preferred embodiment is for the area of the porous surface a porous Material produced. It is thus to produce the porous surface a Used material that has a porous surface.
Die porige Oberfläche weist eine Vielzahl von Poren auf. Die Poren verlaufen nach Art von kleinen Kanälen, durchgehend und/oder nicht durchgehend, und sind unterschiedlich relativ zu der Oberfläche ausgerichtet. Die Poren sind bevorzugt ungeordnet auf der Oberfläche verteilt. Die porige Struktur kann die Oberfläche eines porösen Materials sein, das für ein Fluid, wie beispielsweise Wasser oder Luft, durchlässig ist. Alternativ kann die porige Oberfläche auch auf einem nicht porösem Material vorgesehen sein, beispielsweise wenn ein Material nachträglich bearbeitet wird oder die porige Oberfläche in einem gesonderten Arbeitsschritt auf das Material aufgebracht wird. Bevorzugt ist das verwendete poröse Material, für die mit einem entsprechenden Druck anströmende Luft durchlässig. In einer alternativen Ausgestaltung ist es auch denkbar, ein Material zu verwenden, das nachträglich bearbeitet wurde, um eine porige Oberfläche zu erhalten. Diese Bearbeitung muß dann nicht zwangsläufig zu einem porösen Material führen, das für ein Fluid durchlässig ist, sondern kann sich auf einen Oberflächenbereich beschränken.The porous surface has a variety of pores. The pores run by type of small channels, continuous and / or non-continuous, and are different relative to the surface aligned. The pores are preferably distributed randomly on the surface. The porous structure can be the surface of a porous material be that for a fluid, such as water or air, is permeable. Alternatively, the porous surface may also be on a non-porous material be provided, for example, when a material edited later or the porous surface applied in a separate step on the material becomes. Preferably, the porous material used, for with an appropriate pressure inflowing Air permeable. In an alternative embodiment, it is also conceivable to a material use that later was processed to obtain a porous surface. This editing must then not necessarily to a porous one Lead material, that for a fluid permeable is, but can be limited to a surface area.
In einer bevorzugten Ausgestaltung ist die porige Oberfläche in ihrer Gestalt nach Art eines Schaumes ausgebildet. Bevorzugtes Material für die porige Oberfläche ist ein Aluminiumschaum.In In a preferred embodiment, the porous surface is in their Shape formed in the manner of a foam. Preferred material for the porous one surface is an aluminum foam.
Die porige Oberfläche kann als Schicht auf der Außenseite des Rotorblatts angebracht sein, die bevorzugt in eine Ausnehmung in dem Rotorblatt eingesetzt ist. Die Schicht besteht bevorzugt aus dem porösen Material und bildet dabei im wesentlichen eine einheitliche Oberfläche, die plan in die übrige Oberfläche des Rotorblatts übergeht.The porous surface Can be used as a layer on the outside be attached to the rotor blade, which preferably in a recess is inserted in the rotor blade. The layer is preferred from the porous Material, forming essentially a uniform surface, the plan into the remaining surface of the Rotor blade passes.
In einer alternativen Ausgestaltung ist das poröse Material ein massiver Körper, der bevorzugt in eine Durchbrechung in der Außenwand des Rotorblatts eingesetzt ist. Im Un terschied zu der Ausgestaltung mit einer Schicht aus porösem Material, steht bei dieser Ausgestaltung, der Innenraum des Rotorblatts in Verbindung mit dessen Außenseite. Alternativ oder ergänzend ist es auch möglich, Wandbereiche des Rotorblatts aus porösem Material zu bilden.In In an alternative embodiment, the porous material is a solid body which preferably inserted into an opening in the outer wall of the rotor blade is. In contrast to the embodiment with a layer of porous material is in this embodiment, the interior of the rotor blade in conjunction with its outside. Alternative or supplementary it is also possible To form wall portions of the rotor blade of porous material.
Da die Lärmerzeugung an dem Rotorblatt stark von der Strömungsgeschwindigkeit abhängt, ist die porige Oberfläche bevorzugt in dem Bereich der Blattspitze vorgesehen.There the noise generation on the rotor blade depends strongly on the flow velocity, is the porous surface preferably provided in the area of the blade tip.
In einer bevorzugten Ausgestaltung besitzt die gesamte Blattspitze eine porige Oberfläche. Alternativ ist es auch möglich, daß das Rotorblatt im Bereich der Profilnase und/oder der Profilhinterkante eine porige Oberfläche besitzt.In a preferred embodiment has the entire blade tip a porous surface. Alternatively, it is also possible that this Rotor blade in the region of the profile nose and / or the trailing edge of the profile porous surface has.
Die Erfindung wird anhand der Figuren nachfolgend näher erläutert.The The invention will be explained in more detail below with reference to the figures.
Es zeigt:It shows:
Das poröse Material ist in den dargestellten Ausführungsbeispielen aus Aluminiumschaum ausgeführt, der eine porige Oberfläche besitzt. Es ist aber auch denkbar ein Material mit Edelstahlhohlkügelchen zu verwenden, die durch ein kunststoffbasiertes Bindemittel zusammengehalten werden. Alternativ kann als poröses Material auch ein gesintertes Kunststoffmaterial oder ein poröses Kunststoffmaterial verwendet werden. Das poröse Material kann ausschließlich im Bereich der Oberfläche vorgesehen sein, so daß der zugrunde liegende Blattaufbau weitgehend unverändert ist. Auch ist es möglich, das poröse Material an der Oberfläche vorzusehen und einen porösen Kern oder einen Hohlraum in dem Rotorblatt vorzusehen. Auch kann ein massiver Kern in dem Rotorblatt vorgesehen sein.The porous Material is aluminum foam in the illustrated embodiments executed the one porous surface has. But it is also conceivable a material with hollow stainless steel beads to use, held together by a plastic-based binder become. Alternatively, as a porous Material also a sintered plastic material or a porous plastic material be used. The porous one Material can only in the area of the surface be provided so that the underlying leaf structure is largely unchanged. Also it is possible that porous Material on the surface to provide and a porous To provide core or a cavity in the rotor blade. Also can a solid core may be provided in the rotor blade.
Claims (12)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005019905A DE102005019905B4 (en) | 2005-04-29 | 2005-04-29 | Rotor blade for a wind energy plant |
EP05012630A EP1607624A3 (en) | 2004-06-15 | 2005-06-10 | Turbine blade for a wind turbine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005019905A DE102005019905B4 (en) | 2005-04-29 | 2005-04-29 | Rotor blade for a wind energy plant |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102005019905A1 true DE102005019905A1 (en) | 2006-11-02 |
DE102005019905B4 DE102005019905B4 (en) | 2012-12-06 |
Family
ID=37085097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005019905A Expired - Fee Related DE102005019905B4 (en) | 2004-06-15 | 2005-04-29 | Rotor blade for a wind energy plant |
Country Status (1)
Country | Link |
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DE (1) | DE102005019905B4 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2339171A2 (en) | 2009-12-22 | 2011-06-29 | Siegfried Mickeler | Rotor blade for a wind power converter |
DE102010011275A1 (en) | 2010-03-13 | 2011-09-15 | Kenersys Gmbh | Rotor blade drainage |
US9021696B2 (en) | 2009-04-23 | 2015-05-05 | MTU Aero Engines AG | Method for producing a plating of a vane tip and correspondingly produced vanes and gas turbines |
EP3399182A1 (en) * | 2017-05-05 | 2018-11-07 | Nordex Energy GmbH | Low noise rotor blade tip |
WO2020043870A1 (en) | 2018-08-30 | 2020-03-05 | Wobben Properties Gmbh | Rotor blade for a wind turbine and wind turbine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10240576B2 (en) | 2015-11-25 | 2019-03-26 | General Electric Company | Wind turbine noise reduction with acoustically absorbent serrations |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0652367A1 (en) * | 1993-11-04 | 1995-05-10 | Stork Product Engineering B.V. | Noise reduction for wind turbine |
DE19580147T1 (en) * | 1994-01-12 | 1997-01-02 | Lm Glasfiber As | Windmill |
DE29923485U1 (en) * | 1998-12-09 | 2000-12-07 | Wobben Aloys | Rotor blade for a wind turbine |
WO2005035978A1 (en) * | 2003-10-10 | 2005-04-21 | Repower Systems Ag | Rotor blade for a wind power station |
DE102004028916A1 (en) * | 2004-06-15 | 2006-01-12 | Nordex Energy Gmbh | Rotor blade for power generating wind turbine has porous material on blade tip with regular structure or foam structure to allow drainage of condensation from inside hollow blade |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK174319B1 (en) * | 2000-06-20 | 2002-12-02 | Lm Glasfiber As | Wind turbine blade with noise canceling means |
DE10340978B4 (en) * | 2003-09-05 | 2008-09-18 | Moosdorf, Reinhard W. | Synthetic fiber element for rotor blades |
-
2005
- 2005-04-29 DE DE102005019905A patent/DE102005019905B4/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0652367A1 (en) * | 1993-11-04 | 1995-05-10 | Stork Product Engineering B.V. | Noise reduction for wind turbine |
DE19580147T1 (en) * | 1994-01-12 | 1997-01-02 | Lm Glasfiber As | Windmill |
DE29923485U1 (en) * | 1998-12-09 | 2000-12-07 | Wobben Aloys | Rotor blade for a wind turbine |
WO2005035978A1 (en) * | 2003-10-10 | 2005-04-21 | Repower Systems Ag | Rotor blade for a wind power station |
DE102004028916A1 (en) * | 2004-06-15 | 2006-01-12 | Nordex Energy Gmbh | Rotor blade for power generating wind turbine has porous material on blade tip with regular structure or foam structure to allow drainage of condensation from inside hollow blade |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9021696B2 (en) | 2009-04-23 | 2015-05-05 | MTU Aero Engines AG | Method for producing a plating of a vane tip and correspondingly produced vanes and gas turbines |
EP2339171A2 (en) | 2009-12-22 | 2011-06-29 | Siegfried Mickeler | Rotor blade for a wind power converter |
DE102009060650A1 (en) | 2009-12-22 | 2011-06-30 | Keller, Walter, 66994 | Aeroacoustic rotor blade for a wind turbine and wind turbine equipped therewith |
DE102010011275A1 (en) | 2010-03-13 | 2011-09-15 | Kenersys Gmbh | Rotor blade drainage |
DE102010011275B4 (en) * | 2010-03-13 | 2012-04-26 | Kenersys Gmbh | Rotor blade drainage |
US9046078B2 (en) | 2010-03-13 | 2015-06-02 | Kenersys Gmbh | Rotor blade drain |
EP3399182A1 (en) * | 2017-05-05 | 2018-11-07 | Nordex Energy GmbH | Low noise rotor blade tip |
WO2020043870A1 (en) | 2018-08-30 | 2020-03-05 | Wobben Properties Gmbh | Rotor blade for a wind turbine and wind turbine |
DE102018121249A1 (en) * | 2018-08-30 | 2020-03-05 | Wobben Properties Gmbh | Rotor blade for a wind turbine and wind turbine |
Also Published As
Publication number | Publication date |
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DE102005019905B4 (en) | 2012-12-06 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
R016 | Response to examination communication | ||
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R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20130307 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20141101 |