DE102005019905B4 - Rotor blade for a wind energy plant - Google Patents
Rotor blade for a wind energy plant Download PDFInfo
- Publication number
- DE102005019905B4 DE102005019905B4 DE102005019905A DE102005019905A DE102005019905B4 DE 102005019905 B4 DE102005019905 B4 DE 102005019905B4 DE 102005019905 A DE102005019905 A DE 102005019905A DE 102005019905 A DE102005019905 A DE 102005019905A DE 102005019905 B4 DE102005019905 B4 DE 102005019905B4
- Authority
- DE
- Germany
- Prior art keywords
- rotor blade
- porous
- porous surface
- blade according
- porous material
- 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 - Fee Related
Links
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims description 26
- 239000006260 foam Substances 0.000 claims description 6
- 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
- 206010013710 Drug interaction Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 241000251730 Chondrichthyes Species 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
Rotorblatt für eine Windenergieanlage, dadurch gekennzeichnet, daß eine Außenwand mindestens eine Durchbrechung aufweist, in der ein poröses, wasserdurchlässiges Material angeordnet ist, das mindestens in einem Bereich (12, 16, 20) einer Außenwand des Rotorblatts eine porige Oberfläche bildet, deren Strömungsverhältnisse im Betrieb der Windenergieanlage zu einer reduzierten Schallemission führen.Rotor blade for a wind turbine, characterized in that an outer wall has at least one opening in which a porous, water-permeable material is arranged, which forms a porous surface in at least one area (12, 16, 20) of an outer wall of the rotor blade, the flow conditions of which are in Operation of the wind turbine lead to reduced noise emissions
Description
Die vorliegende Erfindung betrifft ein Rotorblatt für eine Windenergieanlage.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
Aus der nachveröffentlichten
Aus
Der Erfindung liegt die Aufgabe zugrunde ein Rotorblatt bereitzustellen, das mit einfachen Mitteln zu einer Schallreduzierung im Betrieb der Windenergieanlage führt.The invention has for its object to provide a rotor blade, which leads by simple means to a reduction in noise during operation of the wind turbine.
Erfindungsgemäß wird die Aufgabe durch ein Rotorblatt mit den Merkmalen aus Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen bilden die Gegenstände der Unteransprüche.According to the invention the object is achieved by a rotor blade having the features of
Das erfindungsgemäße Rotorblatt für eine Windenergieanlage besitzt mindestens in einem Bereich eine porige Oberfläche zur Lärmreduzierung. Die porige Oberfläche 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 rotor blade according to the invention for a wind energy plant has at least in one area a porous surface for noise reduction. The porous surface is oriented relative to the surface. The pores are preferably distributed randomly on the surface. The porous structure may be the surface of a porous material that is permeable to a fluid, such as water or air. Alternatively, the porous surface may also be provided on a non-porous material, for example, when a material is subsequently processed or the porous surface is applied to the material in a separate operation. Preferably, the porous material used is permeable to the air flowing in with a corresponding pressure. In an alternative embodiment, it is also conceivable to use a material which has been subsequently processed in order to obtain a porous surface. This processing then does not necessarily lead to a porous material that is permeable to a fluid, but may 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 a preferred embodiment, the porous surface is formed in the shape of a foam. Preferred material for the porous 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 may be applied as a layer on the outside of the rotor blade, which is preferably inserted into a recess in the rotor blade. The layer is preferably made of the porous material and thereby forms substantially a uniform surface, which merges smoothly into the remaining surface of the rotor blade.
In einer alternativen Ausgestaltung ist das poröse Material ein massiver Körper, der bevorzugt in eine Durchbrechung in der Außenwand des Rotorblatts eingesetzt ist. Im Unterschied 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 an alternative embodiment, the porous material is a solid body, which is preferably inserted into an opening in the outer wall of the rotor blade. In contrast to the embodiment with a layer of porous material is in this embodiment, the interior of the rotor blade in connection with the outside thereof. Alternatively or additionally, it is also possible to form wall regions of the rotor blade made 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.Since the generation of noise on the rotor blade depends strongly on the flow rate, the porous surface is 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, the entire blade tip has a porous surface. Alternatively, it is also possible that the rotor blade has a porous surface in the region of the profile nose and / or the profile trailing edge.
Die Erfindung wird anhand der Figuren nachfolgend naher erläutert.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 made in the illustrated embodiments of aluminum foam, which has a porous surface. But it is also conceivable to use a material with hollow stainless steel beads, which are held together by a plastic-based binder. Alternatively, as a porous material, a sintered plastic material or a porous plastic material may also be used. The porous material can be provided only in the region of the surface, so that the underlying sheet structure is largely unchanged. It is also possible to provide the porous material on the surface and provide a porous core or cavity in the rotor blade. Also, a solid core may be provided in the rotor blade.
Claims (10)
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 DE102005019905A1 (en) | 2006-11-02 |
DE102005019905B4 true 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 |
---|---|
DE (1) | DE102005019905B4 (en) |
Cited By (4)
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 |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
US10767623B2 (en) | 2018-04-13 | 2020-09-08 | General Electric Company | Serrated noise reducer for a wind turbine rotor blade |
EP3844385B1 (en) * | 2018-08-30 | 2023-10-11 | Wobben Properties GmbH | Rotor blade for a wind turbine and wind turbine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009018685A1 (en) | 2009-04-23 | 2010-10-28 | Mtu Aero Engines Gmbh | Method for producing an armor of a blade tip as well as correspondingly produced blades and gas turbines |
DE102009060650A1 (en) | 2009-12-22 | 2011-06-30 | Keller, Walter, 66994 | Aeroacoustic rotor blade for a wind turbine and wind turbine equipped therewith |
DE102010011275B4 (en) | 2010-03-13 | 2012-04-26 | Kenersys Gmbh | Rotor blade drainage |
ES2844592T3 (en) * | 2017-05-05 | 2021-07-22 | Nordex Energy Se & Co Kg | Silent rotor blade tip |
Citations (6)
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 |
DE29923485U1 (en) * | 1998-12-09 | 2000-12-07 | Wobben Aloys | Rotor blade for a wind turbine |
WO2001098653A1 (en) * | 2000-06-20 | 2001-12-27 | Lm Glasfiber A/S | A wind turbine wing with noise reduction means |
WO2005035978A1 (en) * | 2003-10-10 | 2005-04-21 | Repower Systems Ag | Rotor blade for a wind power station |
DE10340978A1 (en) * | 2003-09-05 | 2005-04-28 | Reinhard W Moosdorf | Synthetic fiber element in form of flatish brushes has individual bristles branching out, and element may be used in rotor wheels of wind plants to suppress airflow noises |
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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19580147B3 (en) * | 1994-01-12 | 2012-11-29 | Lm Glasfiber A/S | windmill |
-
2005
- 2005-04-29 DE DE102005019905A patent/DE102005019905B4/en not_active Expired - Fee Related
Patent Citations (6)
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 |
DE29923485U1 (en) * | 1998-12-09 | 2000-12-07 | Wobben Aloys | Rotor blade for a wind turbine |
WO2001098653A1 (en) * | 2000-06-20 | 2001-12-27 | Lm Glasfiber A/S | A wind turbine wing with noise reduction means |
DE10340978A1 (en) * | 2003-09-05 | 2005-04-28 | Reinhard W Moosdorf | Synthetic fiber element in form of flatish brushes has individual bristles branching out, and element may be used in rotor wheels of wind plants to suppress airflow noises |
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 (5)
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 |
US11268489B2 (en) | 2015-11-25 | 2022-03-08 | 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 |
EP3844385B1 (en) * | 2018-08-30 | 2023-10-11 | Wobben Properties GmbH | Rotor blade for a wind turbine and wind turbine |
US10746157B2 (en) | 2018-08-31 | 2020-08-18 | General Electric Company | Noise reducer for a wind turbine rotor blade having a cambered serration |
Also Published As
Publication number | Publication date |
---|---|
DE102005019905A1 (en) | 2006-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102005019905B4 (en) | Rotor blade for a wind energy plant | |
EP0866920B1 (en) | Process for forming a surface for contact with a flowing fluid and body with such surface regions | |
DE102014106529B4 (en) | Repair procedure for vortex generator and a kit for it | |
DE3709317C2 (en) | ||
DE102006008434A1 (en) | Device for reducing the aerodynamically induced noise at the side edge of a footprint, in particular a high lift surface of an aircraft | |
EP1607624A2 (en) | Turbine blade for a wind turbine | |
DE102014119295A1 (en) | Tool holder for a cutting insert and method for producing the tool holder | |
WO2004037697B1 (en) | Folder | |
DE19719221C1 (en) | Rotor blade for wind generator | |
DE2927287B2 (en) | Multi-layer filter material with at least one layer of open-cell foam | |
DE102010026588A1 (en) | Wind turbine rotor blade has aerodynamic profile, pressure side, suction side, front edge and rear edge, where multiple rear edge extension bodies are arranged side by side along rear edge | |
DE102013210901A1 (en) | Rotor blade of a wind turbine and wind turbine | |
DE102009001953B4 (en) | Device for influencing a supersonic flow around | |
DE60131478T2 (en) | Construction of an openable vehicle roof | |
EP2012022A2 (en) | Device for ventilation/removal of air from a number of pneumatic actuators | |
DE202010005241U1 (en) | air table | |
DE102011010297A1 (en) | Method for generating microstructure for blade for turbomachine, involves forming several cutting edges of various heights in side by side on sonotrode used for performing ultrasonic shock treatment | |
DE202010014870U1 (en) | Flow channel for an air conditioner | |
DE19905036C2 (en) | Valve | |
DE102008015763B4 (en) | Apparatus for venting a plurality of pneumatic actuators, seat and vehicle with such a device | |
DE102010063769B4 (en) | aerodynamics component | |
EP3252312A1 (en) | Return/outlet valve for a vacuum pump | |
DE10047068A1 (en) | Filter for heater/air conditioning system for motor vehicles has two filter layers enclosing intermediate space filled with sound-absorbent material | |
DE102012214734B3 (en) | Portion of supersonic flow channel used in jet engine, has plane that is extended upstream of recess, and introducing portion and projection that are arranged in cross-section recess | |
EP2726397A1 (en) | Gas barrier, and filling element having at least one gas barrier |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20130307 |
|
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 |