CA2869803A1 - Noise reducing extension plate for rotor blade in wind turbine - Google Patents

Noise reducing extension plate for rotor blade in wind turbine Download PDF

Info

Publication number
CA2869803A1
CA2869803A1 CA2869803A CA2869803A CA2869803A1 CA 2869803 A1 CA2869803 A1 CA 2869803A1 CA 2869803 A CA2869803 A CA 2869803A CA 2869803 A CA2869803 A CA 2869803A CA 2869803 A1 CA2869803 A1 CA 2869803A1
Authority
CA
Canada
Prior art keywords
rotor blade
extension plate
trailing edge
blade assembly
filler substrate
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
Application number
CA2869803A
Other languages
French (fr)
Other versions
CA2869803C (en
Inventor
Kevin Wayne Kinzie
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.)
General Electric Renovables Espana SL
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of CA2869803A1 publication Critical patent/CA2869803A1/en
Application granted granted Critical
Publication of CA2869803C publication Critical patent/CA2869803C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/065Rotors characterised by their construction elements
    • F03D1/0675Rotors characterised by their construction elements of the blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00Function
    • F05B2260/96Preventing, counteracting or reducing vibration or noise
    • F05B2260/962Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/49336Blade making

Abstract

Rotor blade assemblies and methods for constructing rotor blade assemblies are provided. A rotor blade assembly may include a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord. The rotor blade assembly further includes an extension plate mounted to one of the pressure side or the suction side, the extension plate extending in the chord- wise direction between a first end and a second end, the second end extending beyond the trailing edge. The rotor blade assembly further includes a filler substrate provided on an inner surface of the extension plate and the trailing edge, the filler substrate tapering from the trailing edge towards the second end.

Description

NOISE REDUCING EXTENSION PLATE FOR
ROTOR BLADE IN WIND TURBINE
FIELD OF THE INVENTION
[0001] The present disclosure relates in general to wind turbine rotor blades, and more particularly to extension plates configured on the rotor blades.
BACKGROUND OF THE INVENTION
[0002] Wind power is considered one of the cleanest, most environmentally friendly energy sources presently available, and wind turbines have gained increased attention in this regard. A modern wind turbine typically includes a tower, generator, gearbox, nacelle, and one or more rotor blades. The rotor blades capture kinetic energy of wind using known airfoil principles. The rotor blades transmit the kinetic energy in the form of rotational energy so as to turn a shaft coupling the rotor blades to a gearbox, or if a gearbox is not used, directly to the generator. The generator then converts the mechanical energy to electrical energy that may be deployed to a utility grid.
[0003] In many cases, various components are attached to the rotor blades of wind turbines to perform various functions during operation of the wind turbines.
These components may frequently be attached adjacent the trailing edges of the rotor blades.
For example, noise reducers may be attached adjacent the trailing edges of the rotor blades to reduce the noise and increase the efficiency associated with the rotor blades.
However, typical prior art noise reducers have a variety of disadvantages, and may not adequately reduce the noise associated with typical rotor blades. For example, many currently known noise reducers include a plurality of serrations. The serrations are designed to reduce noise when the wind flow over the noise reducer flows in a certain direction. If the direction of wind flow is altered, however, the effectiveness of the serrations in reducing the noise may be reduced.
[0004] Additionally, manufacturing limitations may limit the amount of noise reduction of which a rotor blade is capable. For example, a rotor blade is typically formed from a shell which includes various layers of material. Due to strength requirements for the rotor blade, the trailing edge of the rotor blade, such as of the shell forming the rotor blade, has minimum thickness limitations. Some rotor blades, for example, have trailing edges which are no less than 5 millimeters thick. Such minimum thickness limitations additionally limit further noise reduction efforts.
[0005] Accordingly, improved rotor blade assemblies would be desired in the art.
For example, rotor blade assemblies which include improved noise reduction apparatus would be advantageous.
BRIEF DESCRIPTION OF THE INVENTION
[0006] Aspects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.
[0007] In one embodiment, a rotor blade assembly is disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord. The rotor blade assembly further includes an extension plate mounted to one of the pressure side or the suction side, the extension plate extending in the chord-wise direction between a first end and a second end, the second end extending beyond the trailing edge. The rotor blade assembly further includes a filler substrate provided on an inner surface of the extension plate and the trailing edge, the filler substrate tapering from the trailing edge towards the second end.
[0008] In another embodiment, a rotor blade assembly is disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord. The rotor blade assembly further includes an extension plate mounted to one of the pressure side or the suction side, the extension plate extending in the chord-wise direction between a first end and a second end, the second end extending beyond the trailing edge. The extension plate has a thickness that is less than a thickness of the trailing edge.
[0009] In another embodiment, a method for constructing a rotor blade assembly is disclosed. The method includes mounting an extension plate to one of the pressure side or the suction side of a rotor blade, applying a filler substrate to the extension plate and the rotor blade, and forming the filler substrate such that the filler substrate tapers from a trailing edge of the rotor blade towards a second end of the extension plate.
[0010] These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] A full and enabling disclosure of the present invention, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which:
[0012] FIG. 1 is a side view of a wind turbine according to one embodiment of the present disclosure;
[0013] FIG. 2 is a top view of a rotor blade assembly according to one embodiment of the present disclosure; and
[0014] FIG. 3 is a cross-sectional view of a rotor blade assembly according to one embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION
[0015] Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
[0016] FIG. 1 illustrates a wind turbine 10 of conventional construction.
The wind turbine 10 includes a tower 12 with a nacelle 14 mounted thereon. A plurality of rotor blades 16 are mounted to a rotor hub 18, which is in turn connected to a main flange that turns a main rotor shaft. The wind turbine power generation and control components are housed within the nacelle 14. The view of FIG. 1 is provided for illustrative purposes only to place the present invention in an exemplary field of use. It should be appreciated that the invention is not limited to any particular type of wind turbine configuration.
[0017] Referring to FIG. 2, a rotor blade 16 according to the present disclosure is typically formed from a shell which may include exterior surfaces defining a pressure side 22 (see FIGS. 3 through 8) and a suction side 24 extending between a leading edge 26 and a trailing edge 28, and may extend from a blade tip 32 to a blade root 34. The exterior surfaces may be generally aerodynamic surfaces having generally aerodynamic contours, as is generally known in the art.
[0018] In some embodiments, the rotor blade 16 may include a plurality of individual blade segments aligned in an end-to-end order from the blade tip 32 to the blade root 34.
Each of the individual blade segments may be uniquely configured so that the plurality of blade segments define a complete rotor blade 16 having a designed aerodynamic profile, length, and other desired characteristics. For example, each of the blade segments may have an aerodynamic profile that corresponds to the aerodynamic profile of adjacent blade segments. Thus, the aerodynamic profiles of the blade segments may form a continuous aerodynamic profile of the rotor blade 16. Alternatively, the rotor blade 16 may be formed as a singular, unitary blade having the designed aerodynamic profile, length, and other desired characteristics.
[0019] The rotor blade 16 may, in exemplary embodiments, be curved. Curving of the rotor blade 16 may entail bending the rotor blade 16 in a generally flapwise direction and/or in a generally edgewise direction. The flapwise direction may generally be construed as the direction (or the opposite direction) in which the aerodynamic lift acts on the rotor blade 16. The edgewise direction is generally perpendicular to the flapwise direction. Flapwise curvature of the rotor blade 16 is also known as pre-bend, while edgewise curvature is also known as sweep. Thus, a curved rotor blade 16 may be pre-bent and/or swept. Curving may enable the rotor blade 16 to better withstand flapwise and edgewise loads during operation of the wind turbine 10, and may further provide clearance for the rotor blade 16 from the tower 12 during operation of the wind turbine 10.
[0020] The rotor blade 16 may further define chord 42 and a span 44. As shown in FIG. 2, the chord 42 may vary throughout the span 44 of the rotor blade 16.
Thus, a local chord 46 may be defined for the rotor blade 16 at any point on the rotor blade 16 along the span 44.
[0021] Additionally, the rotor blade 16 may define an inboard area 52 and an outboard area 54. The inboard area 52 may be a span-wise portion of the rotor blade 16 extending from the root 34. For example, the inboard area 52 may, in some embodiments, include approximately 33%, 40%, 50%, 60%, 67%, or any percentage or range of percentages therebetween, or any other suitable percentage or range of percentages, of the span 44 from the root 34. The outboard area 54 may be a span-wise portion of the rotor blade 16 extending from the tip 32, and may in some embodiments include the remaining portion of the rotor blade 16 between the inboard area 52 and the tip 32. Additionally or alternatively, the outboard area 54 may, in some embodiments, include approximately 33%, 40%, 50%, 60%, 67%, or any percentage or range of percentages therebetween, or any other suitable percentage or range of percentages, of the span 44 from the tip 32.
[0022] As illustrated in FIGS. 2 and 3, the present disclosure may further be directed to one or more rotor blade assemblies 100. A rotor blade assembly 100 according to the present disclosure includes a rotor blade 16 and one or more extension plates 110. In general, an extension plate 110 may be mounted to a surface of the rotor blade 16, such as in exemplary embodiments the suction side 24 or alternatively the pressure side 22. The extension plate 110 may advantageously have a thickness 112 that is less than a thickness 113 of the trailing edge 28 of the rotor blade 16. Thus, the extension plate 110 effectively extends a portion of the trailing edge 28 at locations to which the extension plate 110 is mounted, and reduces the thickness of the effective trailing edge at these locations. Such thickness may advantageously be reduced beyond those available for the rotor blade 16 itself due to the manufacturing limitations as discussed above. Reducing this thickness may advantageously reduce the aerodynamic noise being emitted from the rotor blade 16 during operation of the wind turbine 10 and/or increase the efficiency of the rotor blade 16.
[0023] As discussed, extension plate 110 in exemplary embodiments as shown in FIGS. 2 and 3 may be mounted to the suction side 24 of the rotor blade 16.
Alternatively, extension plate 110 may be mounted to the pressure side 22. The extension plate 110 may be mounted directly to such surfaces via, for example, a suitable adhesive or suitable mechanical fasteners.
[0024] Extension plate 110 when mounted to a rotor blade 16 extends in the chord-wise direction between a first end 120 and a second end 122. The extension plate 110 may be mounted to the rotor blade 16 such that the second end 122 extends beyond the trailing edge 28. Further, the second end 122 when viewed from a top or bottom view such that shown in FIG. 2, may have a generally smooth, continuous profile, such that for example serrations are not formed by the extension plate 110. In some exemplary embodiments, for example, the extension plate 110 may be generally rectangular, as illustrated for example in FIG. 2.
[0025] As discussed, extension plate 110, and in particular the second end thereof, may have a thickness 112 that is less than the thickness 113 of the rotor blade 16 trailing edge 28. For example, in some exemplary embodiments, thickness 112 may be less than 2 millimeters. In other exemplary embodiments, thickness 112 may be approximately 1 millimeter. Other suitable thicknesses less than the thickness 113 of the rotor blade 16 trailing edge 28 are within the scope and spirit of the present disclosure.
Such minimal thicknesses advantageously provide increased noise reduction characteristics for the rotor blade assembly 100 relative to the characteristics of the rotor blade 16 (and larger trailing edge thickness 113) itself.
[0026] In exemplary embodiments, extension plate 110 may be formed from fiberglass or another suitable composite material. For example, to facilitate the minimal thickness 112 of the extension plate 110, a single ply of, for example, fiberglass may be utilized. Alternatively, however, other suitable materials, such as metals, may be utilized.
[0027] Extension plate 110 may further define a width 130 (in the chord-wise direction when mounted to rotor blade 16) and a length 132 (in the span-wise direction when mounted to rotor blade 16). Further, an extension portion 134 of the extension plate 110 may be defined as the portion that extends beyond the trailing edge
28 of the rotor blade, or in other words the portion between the second end 122 and the trailing edge 28. Extension portion 134 may define a width 136.
[0028] In some embodiments, width 136 of extension portion 134 is between approximately 5 times and approximately 20 times the thickness 113 of the trailing edge 28, such as between approximately 10 times and approximately 20 times the thickness 113. In other embodiments, width 136 is less than approximately 10 centimeters. In still other exemplary embodiments, width 136 is approximately 5 centimeters.
[0029] The overall width 130 may in some embodiments be less than or equal to approximately 20% of the chord 42 (such as the local chord 46 or average local chord 46 over the length of the 132 of the extension plate 110). In other embodiments, the overall width 130 may be between approximately 10% and approximately 20% of the chord (such as the local chord 46 or average local chord 46 over the length of the 132 of the extension plate 110).
[0030] Extension plate 110 may further be mountable to the outboard portion 54 of the rotor blade, such that for example the entire extension plate 110 is within the outboard portion 54 in the span-wise direction. In some embodiments, for example, the length 132 of the extension plate 110 may be less than one-third of the span 44. In other embodiments, the length 132 of the extension plate 110 may be less than one-fourth of the span 44.
[0031] Such widths 130, 136 and 132 may advantageously facilitate the improved noise reduction characteristics of the extension plate 110 and rotor blade assembly 100 in general.
[0032] As illustrated in FIG. 3, a rotor blade assembly 100 according to the present disclosure may further include a filler substrate 150. The filler substrate 150 may be provided on the extension plate 110 and the trailing edge 28, and may provide a tapered transition between the trailing edge 28 and extension plate 110. For example, as illustrated, filler substrate 150 may be provided on an inner surface 152 of the extension plate 110, such as of the extension portion 134 of the extension plate 110.
The filler substrate 150 may also be provided on the trailing edge 28, and may taper from the trailing edge 28 towards the second end 122. For example, filler substrate 150 may be provided on the rotor blade assembly 100, and then tapered (such as through use of a blade, squeegee, or other suitable tapering instrument) to a desired tapered profile. Filler substrate 150 may thus provide a transition between the trailing edge 28 and the second end 122.
[0033] Filler substrate 150 may be any suitable material. For example, in some embodiments, filler substrate 150 may be a bonding paste. Alternatively, filler substrate 150 may be a rubber or a silicone.
[0034] Use of a filler substrate 150 according to the present disclosure may advantageously facilitate the improved noise reduction characteristics of the extension plate 110 and rotor blade assembly 100 in general.
[0035] As illustrated in FIG. 3, a rotor blade assembly 100 according to the present disclosure may further include an auxiliary filler substrate 160. The auxiliary filler substrate 160 may be provided on the first end 120 of the extension plate 110 and the surface of the rotor blade 16 to which the extension plate is mounted, and may provide a tapered transition between the first end 120 and surface. For example, as illustrated, auxiliary filler substrate 160 may taper from the first end 120 towards the surface.
Auxiliary filler substrate 160 may be provided on the rotor blade assembly 100, and then tapered (such as through use of a blade, squeegee, or other suitable tapering instrument) to a desired tapered profile. Auxiliary filler substrate 160 may thus provide a transition between the first end 120 and the surface.
[0036] Auxiliary filler substrate 160 may be any suitable material. For example, in some embodiments, auxiliary filler substrate 160 may be a bonding paste.
Alternatively, auxiliary filler substrate 160 may be a rubber or a silicone.
[0037] Use of an auxiliary filler substrate 160 according to the present disclosure may advantageously facilitate the improved noise reduction characteristics of the extension plate 110 and rotor blade assembly 100 in general.
[0038] The present disclosure is further directed to methods for constructing rotor blade assemblies 100. A method may include, for example, mounting an extension plate 110 to one of the pressure side 22 or the suction side 24 of a rotor blade 16, as discussed herein. A method may further include, for example, applying a filler substrate 150 to the extension plate 110 and rotor blade 16, as discussed herein. A method may further include, for example, forming the filler substrate 150 such that the filler substrate 150 tapers from a trailing edge 28 of the rotor blade 16 towards a second end 122 of the extension plate 110, as discussed herein.
[0039] In some embodiments, a method according to the present disclosure may further include applying an auxiliary filler substrate 160 to the extension plate 110 and the rotor blade 16, as discussed herein. Such method may further include forming the auxiliary filler substrate 160 such that the auxiliary filler substrate 160 tapers from a first end 120 of the extension plate 110 towards the one of the pressure side 22 or the suction side 24 of the rotor blade 16.
[0040] While there have been described herein what are considered to be preferred and exemplary embodiments of the present invention, other modifications of these embodiments falling within the scope of the invention described herein shall be apparent to those skilled in the art.

Claims (20)

WHAT IS CLAIMED IS:
1. A rotor blade assembly, comprising:
a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord;
an extension plate mounted to one of the pressure side or the suction side, the extension plate extending in the chord-wise direction between a first end and a second end, the second end extending beyond the trailing edge; and, a filler substrate provided on an inner surface of the extension plate and the trailing edge, the filler substrate tapering from the trailing edge towards the second end.
2. The rotor blade assembly of claim 1, wherein the extension plate has a thickness of less than 2 millimeters.
3. The rotor blade assembly of claim 1, wherein the extension plate has a thickness of approximately 1 millimeter.
4. The rotor blade assembly of claim 1, wherein an extension portion of the extension plate which extends beyond the trailing edge has a width in the chord-wise direction of between approximately 5 times and approximately 20 times a thickness of the trailing edge.
5. The rotor blade assembly of claim 1, wherein an extension portion of the extension plate which extends beyond the trailing edge has a width in the chord-wise direction of less than approximately 10 centimeters.
6. The rotor blade assembly of claim I, wherein the extension plate has an overall width in the chord-wise direction of less than or equal to approximately 20 percent of the chord.
7. The rotor blade assembly of claim 1, wherein the extension plate is mounted to the suction side.
8. The rotor blade assembly of claim 1, wherein the filler substrate is one of a bonding paste, a rubber, or a silicone.
9. The rotor blade assembly of claim 1, further comprising an auxiliary filler substrate, the auxiliary filler substrate provided on the first end and the one of the pressure side or the suction side, the auxiliary filler substrate tapering from the first end towards the one of the pressure side or the suction side.
10. A rotor blade assembly, comprising:
a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root, the rotor blade defining a span and a chord;
an extension plate mounted to one of the pressure side or the suction side, the extension plate extending in the chord-wise direction between a first end and a second end, the second end extending beyond the trailing edge, the extension plate having a thickness that is less than a thickness of the trailing edge.
11. The rotor blade assembly of claim 10, wherein the extension plate has a thickness of less than approximately 2 millimeters.
12. The rotor blade assembly of claim 10, wherein an extension portion of the extension plate which extends beyond the trailing edge has a width in the chord-wise direction of between approximately 5 times and approximately 20 times a thickness of the trailing edge.
13. The rotor blade assembly of claim 10, wherein an extension portion of the extension plate which extends beyond the trailing edge has a width in the chord-wise direction of less than approximately 10 centimeters.
14. The rotor blade assembly of claim 10, wherein the extension plate has an overall width in the chord-wise direction of less than or equal to approximately 20 percent of the chord.
15. The rotor blade assembly of claim 10, wherein the extension plate is mounted to the suction side.
16. The rotor blade assembly of claim 10, further comprising a filler substrate provided on an inner surface of the extension plate and the trailing edge, the filler substrate tapering from the trailing edge towards the second end.
17. The rotor blade assembly of claim 16, wherein the filler substrate is one of a bonding paste, a rubber, or a silicone.
18. The rotor blade assembly of claim 10, further comprising an auxiliary filler substrate, the auxiliary filler substrate provided on the first end and the one of the pressure side or the suction side, the auxiliary filler substrate tapering from the first end towards the one of the pressure side or the suction side.
19. A method for constructing a rotor blade assembly, the method comprising:
mounting an extension plate to one of the pressure side or the suction side of a rotor blade;
applying a filler substrate to the extension plate and the rotor blade; and forming the filler substrate such that the filler substrate tapers from a trailing edge of the rotor blade towards a second end of the extension plate.
20. The method of claim 19, further comprising:
applying an auxiliary filler substrate to the extension plate and the rotor blade;
and forming the auxiliary filler substrate such that the auxiliary filler substrate tapers from a first end of the extension plate towards the one of the pressure side or the suction side of the rotor blade.
CA2869803A 2013-11-20 2014-11-06 Noise reducing extension plate for rotor blade in wind turbine Active CA2869803C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/085,047 US9494134B2 (en) 2013-11-20 2013-11-20 Noise reducing extension plate for rotor blade in wind turbine
US14/085,047 2013-11-20

Publications (2)

Publication Number Publication Date
CA2869803A1 true CA2869803A1 (en) 2015-05-20
CA2869803C CA2869803C (en) 2022-10-25

Family

ID=53173494

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2869803A Active CA2869803C (en) 2013-11-20 2014-11-06 Noise reducing extension plate for rotor blade in wind turbine

Country Status (3)

Country Link
US (1) US9494134B2 (en)
CA (1) CA2869803C (en)
DE (1) DE102014116970A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3181895A1 (en) * 2015-12-17 2017-06-21 LM WP Patent Holding A/S Splitter plate arrangement for a serrated wind turbine blade
EP3219980B1 (en) * 2016-03-16 2019-01-02 Siemens Aktiengesellschaft Trailing edge air duct of a wind turbine rotor blade
US10400744B2 (en) 2016-04-28 2019-09-03 General Electric Company Wind turbine blade with noise reducing micro boundary layer energizers
DE102016117012A1 (en) * 2016-09-09 2018-03-15 Wobben Properties Gmbh Wind turbine rotor blade
US20190024631A1 (en) * 2017-07-20 2019-01-24 General Electric Company Airflow configuration for a wind turbine rotor blade
EP3536947B1 (en) * 2018-03-08 2023-07-12 Siemens Gamesa Renewable Energy A/S Protective cover for protecting a leading edge of a wind turbine blade
US20190293049A1 (en) * 2018-03-26 2019-09-26 General Electric Company Methods for Joining Blade Components of Rotor Blades Using Printed Grid Structures
US10767623B2 (en) 2018-04-13 2020-09-08 General Electric Company Serrated noise reducer for a wind turbine rotor blade
CN108953053B (en) * 2018-07-16 2021-01-12 上海电气风电集团股份有限公司 Wind power blade with comb-shaped sawtooth structure and mounting method thereof
US10746157B2 (en) 2018-08-31 2020-08-18 General Electric Company Noise reducer for a wind turbine rotor blade having a cambered serration

Family Cites Families (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899128A (en) 1959-08-11 Vaghi
US573562A (en) 1896-12-22 Propeller
US175355A (en) 1876-03-28 Waltee king
USRE19412E (en) 1935-01-01 Aircraft and control thereof
US1861065A (en) 1930-08-18 1932-05-31 Poot Philippe Screw-propeller for flying machines and other aerodynamics apparatus
US2071012A (en) 1932-11-22 1937-02-16 Adams Herbert Luther Noiseless device
US2238749A (en) 1939-01-30 1941-04-15 Clarence B Swift Fan blade
US2225312A (en) 1939-10-05 1940-12-17 Bell Telephone Labor Inc Acoustic device
US2312219A (en) 1941-04-21 1943-02-23 Sensenich Brothers Aircraft propeller
US2469167A (en) 1946-06-11 1949-05-03 American Steel & Wire Co Vibration damper
US3586460A (en) * 1969-05-14 1971-06-22 Us Air Force Rotor blade variable modulus trailing edge
IT1036993B (en) 1974-07-02 1979-10-30 Rotron Inc DEVICE FOR THE MOVEMENT OF A FLUID
US4204629A (en) 1977-07-20 1980-05-27 Rolls-Royce Limited Brush seal and a method of manufacture
US4188171A (en) * 1977-08-02 1980-02-12 The Boeing Company Rotor blade internal damper
US4618313A (en) 1980-02-06 1986-10-21 Cofimco S.R.L. Axial propeller with increased effective displacement of air whose blades are not twisted
GB8626408D0 (en) 1986-11-05 1987-12-16 Secr Defence Damping treatment for pipes & bodies
US4720244A (en) 1987-05-21 1988-01-19 Hudson Products Corporation Fan blade for an axial flow fan and method of forming same
US5088665A (en) 1989-10-31 1992-02-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Serrated trailing edges for improving lift and drag characteristics of lifting surfaces
US5320491A (en) 1992-07-09 1994-06-14 Northern Power Systems, Inc. Wind turbine rotor aileron
US5328329A (en) 1993-07-06 1994-07-12 Hudson Products Corporation Fan blade width extender
NL9301910A (en) * 1993-11-04 1995-06-01 Stork Prod Eng Wind turbine.
US5522266A (en) 1993-11-30 1996-06-04 Medex, Inc. Low cost pressure transducer particularly for medical applications
CA2141529A1 (en) 1994-10-25 1996-04-26 Frances Gould Street sweeper brush assembly
DE4440744A1 (en) 1994-11-15 1996-05-23 Peter Frieden Wind turbine generator rotor blade
US6352601B1 (en) 1994-12-27 2002-03-05 The B. F. Goodrich Company Self-adhering ice protector
DE19647102A1 (en) 1996-11-14 1998-05-20 Philippe Arribi Flow body
US6023898A (en) 1998-06-01 2000-02-15 Ground Star, Llc Metal frame building construction
JP2000120524A (en) 1998-10-16 2000-04-25 Mitsubishi Heavy Ind Ltd Windmill blade
EP1141543B2 (en) 1998-12-09 2013-11-20 Aloys Wobben Rotor blade of a wind turbine
GB2358130A (en) 2000-01-17 2001-07-18 Llewellyn Jones John Adrian One-piece toothbrush
DE10020177A1 (en) 2000-04-25 2001-11-08 Daimler Chrysler Ag Device for reducing noise on aircraft wings
BR0003706A (en) 2000-05-30 2002-02-13 Tecsis Tecnologia E Sist S Ava Axle fan for low noise and high efficiency
DK174318B1 (en) * 2000-06-19 2002-12-02 Lm Glasfiber As Wind turbine rotor blade includes flap comprising laminate(s) with layers of materials having differing thermal expansion coefficients
US6733240B2 (en) 2001-07-18 2004-05-11 General Electric Company Serrated fan blade
CA2454038C (en) 2001-07-19 2009-09-29 Neg Micon A/S Wind turbine blade
DE10157849A1 (en) 2001-11-24 2003-06-12 Airbus Gmbh Arrangement for reducing the aerodynamic noise on a slat of a commercial aircraft
US6872048B2 (en) 2001-11-26 2005-03-29 Lennox Industries, Inc. Fan with reduced noise generation
US7059833B2 (en) 2001-11-26 2006-06-13 Bonus Energy A/S Method for improvement of the efficiency of a wind turbine rotor
EP1338793A3 (en) 2002-02-22 2010-09-01 Mitsubishi Heavy Industries, Ltd. Serrated wind turbine blade trailing edge
JP2003254225A (en) 2002-03-05 2003-09-10 Ebara Corp Device for reducing airflow noise of windmill
US7632068B2 (en) 2003-03-31 2009-12-15 Technical University Of Denmark Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control
US20040219059A1 (en) 2003-05-03 2004-11-04 Novosci Corp. Heart bypass system incorporating minimized extracorporeal blood circulation system and related method of use
DE102004008618A1 (en) 2004-02-21 2005-09-08 Geka Brush Gmbh Brush for applying cosmetic or nourishing products
US7328770B2 (en) 2005-06-16 2008-02-12 Owens Jeffrey A Strap silencer
US7637721B2 (en) 2005-07-29 2009-12-29 General Electric Company Methods and apparatus for producing wind energy with reduced wind turbine noise
MX2008002475A (en) 2005-08-22 2008-09-10 Viryd Technologies Inc Fluid energy converter.
US7458777B2 (en) 2005-09-22 2008-12-02 General Electric Company Wind turbine rotor assembly and blade having acoustic flap
ES2318925B1 (en) 2005-09-22 2010-02-11 GAMESA INNOVATION & TECHNOLOGY, S.L. AEROGENERATOR WITH A BLADE ROTOR THAT REDUCES NOISE.
US20070125919A1 (en) 2005-12-06 2007-06-07 Hopkins William K Apparatus and method for displaying objects on shelves and the like
DK176352B1 (en) 2005-12-20 2007-09-10 Lm Glasfiber As Profile series for blade for wind turbines
NL1031223C1 (en) 2006-02-23 2007-08-24 Stichting Nationaal Lucht En R Wind turbine blade, has brush at back edge of blade, where brush includes synthetic bristles that rest parallel to top or bottom of blade
DE102006017897B4 (en) 2006-04-13 2008-03-13 Repower Systems Ag Rotor blade of a wind turbine
US7740206B2 (en) 2006-04-13 2010-06-22 The Board Of Trustees Of The Leland Stanford Junior University Translating active Gurney flap to alleviate aircraft wake vortex hazard
BE1017134A5 (en) 2006-05-11 2008-03-04 Delaere Marc BRUSH FOR A SCRUB, SWEEP AND / OR BONE MACHINE AND SPRAY DEVICE FOR CLEANING MULTIPLE SURFACES SIZED BY GROOPS AND / OR JOINING EACH OTHER.
ATE537356T1 (en) 2006-06-09 2011-12-15 Vestas Wind Sys As WIND TURBINE ROTOR BLADE AND PITCH CONTROLLED WIND TURBINE
US20080001363A1 (en) 2006-06-28 2008-01-03 General Electric Company Brush sealing system and method for rotary machines
EP1892442A1 (en) 2006-08-18 2008-02-27 Siemens Aktiengesellschaft Brush seal for a turbomachine
US10611468B2 (en) 2006-09-08 2020-04-07 Steven Sullivan Method and apparatus for mitigating trailing vortex wakes of lifting or thrust generating bodies
DE102006043462A1 (en) 2006-09-15 2008-03-27 Deutsches Zentrum für Luft- und Raumfahrt e.V. Aerodynamic component e.g. rotor blade, for use in wind turbine, has pair of surface units on high pressure side engaged between two surface units on low pressure side in main extension direction of trailing edge
US7959412B2 (en) 2006-09-29 2011-06-14 General Electric Company Wind turbine rotor blade with acoustic lining
US7811063B2 (en) 2006-11-03 2010-10-12 General Electric Company Damping element for a wind turbine rotor blade
JP2008115783A (en) 2006-11-06 2008-05-22 Fuji Heavy Ind Ltd Blade for wind turbine
EP1927454A1 (en) 2006-11-29 2008-06-04 Trisa Holding AG Toothbrush with partially coated surface
US20080166241A1 (en) 2007-01-04 2008-07-10 Stefan Herr Wind turbine blade brush
US7918653B2 (en) 2007-02-07 2011-04-05 General Electric Company Rotor blade trailing edge assemby and method of use
US7413408B1 (en) 2007-02-22 2008-08-19 Samuel B Tafoya Vibration-reducing and noise-reducing spoiler for helicopter rotors, aircraft wings, propellers, and turbine blades
WO2008113349A2 (en) 2007-03-20 2008-09-25 Vestas Wind Systems A/S Slow rotating wind turbine rotor with slender blades
WO2008131800A1 (en) 2007-04-30 2008-11-06 Vestas Wind Systems A/S A wind turbine blade
ES2345583B1 (en) 2007-05-31 2011-07-28 GAMESA INNOVATION & TECHNOLOGY, S.L. AEROGENERATOR SHOVEL WITH ANTI-NOISE DEVICES.
US7927078B2 (en) 2007-07-12 2011-04-19 General Electric Company Wind turbine blade tip vortex breakers
NL2000821C2 (en) 2007-08-17 2009-02-18 Stichting Energie Wind turbine and rotor blade.
US20090074585A1 (en) 2007-09-19 2009-03-19 General Electric Company Wind turbine blades with trailing edge serrations
US8047804B2 (en) 2007-12-27 2011-11-01 General Electric Company Wind tower and method of assembling the same
US20090097976A1 (en) 2007-10-15 2009-04-16 General Electric Company Active damping of wind turbine blades
ES2362395T3 (en) 2007-10-22 2011-07-04 Actiflow B.V. WIND TURBINE WITH LIMIT COAT CONTROL.
US8418967B2 (en) 2008-02-21 2013-04-16 Cornerstone Research Group, Inc. Passive adaptive structures
GB2462308A (en) 2008-08-01 2010-02-03 Vestas Wind Sys As Extension portion for wind turbine blade
EP2309119A1 (en) 2008-08-06 2011-04-13 Mitsubishi Heavy Industries, Ltd. Windmill blade and wind power generator using same
US9239039B2 (en) 2008-10-27 2016-01-19 General Electric Company Active circulation control of aerodynamic structures
EP2138714A1 (en) 2008-12-12 2009-12-30 Lm Glasfiber A/S Wind turbine blade having a flow guiding device with optimised height
US20100143151A1 (en) 2009-02-06 2010-06-10 General Electric Company Permeable acoustic flap for wind turbine blades
EP2253838A1 (en) 2009-05-18 2010-11-24 Lm Glasfiber A/S A method of operating a wind turbine
US20100329879A1 (en) 2009-06-03 2010-12-30 Presz Jr Walter M Wind turbine blades with mixer lobes
EP2270312A1 (en) 2009-07-01 2011-01-05 PEM-Energy Oy Aero- or hydrodynamic construction
US7909576B1 (en) * 2010-06-24 2011-03-22 General Electric Company Fastening device for rotor blade component
US8083488B2 (en) * 2010-08-23 2011-12-27 General Electric Company Blade extension for rotor blade in wind turbine
US7976276B2 (en) 2010-11-04 2011-07-12 General Electric Company Noise reducer for rotor blade in wind turbine
US7976283B2 (en) 2010-11-10 2011-07-12 General Electric Company Noise reducer for rotor blade in wind turbine
US8523515B2 (en) * 2010-11-15 2013-09-03 General Electric Company Noise reducer for rotor blade in wind turbine
CA2818201C (en) 2010-11-30 2014-11-18 Lihua Liu Noise reducer for rotor blade in wind turbine
US8267657B2 (en) 2010-12-16 2012-09-18 General Electric Company Noise reducer for rotor blade in wind turbine
US20110268558A1 (en) 2010-12-20 2011-11-03 General Electric Company Noise reducer for rotor blade in wind turbine
US8414261B2 (en) 2011-05-31 2013-04-09 General Electric Company Noise reducer for rotor blade in wind turbine
US8834127B2 (en) 2011-09-09 2014-09-16 General Electric Company Extension for rotor blade in wind turbine
US8506250B2 (en) * 2011-10-19 2013-08-13 General Electric Company Wind turbine rotor blade with trailing edge extension and method of attachment
US8430638B2 (en) 2011-12-19 2013-04-30 General Electric Company Noise reducer for rotor blade in wind turbine
US20130164141A1 (en) * 2011-12-22 2013-06-27 General Electric Company Blade with semi-rigid trailing edge
US20130280085A1 (en) 2012-04-23 2013-10-24 General Electric Company Flow modification device for rotor blade in wind turbine
US9638164B2 (en) * 2013-10-31 2017-05-02 General Electric Company Chord extenders for a wind turbine rotor blade assembly

Also Published As

Publication number Publication date
US20150139810A1 (en) 2015-05-21
DE102014116970A1 (en) 2015-05-21
US9494134B2 (en) 2016-11-15
CA2869803C (en) 2022-10-25

Similar Documents

Publication Publication Date Title
CA2869803C (en) Noise reducing extension plate for rotor blade in wind turbine
US8834127B2 (en) Extension for rotor blade in wind turbine
US8393871B2 (en) Wind turbine blade shear web connection assembly
AU2013222047B2 (en) Attachment system for a wind turbine rotor blade accessory
US9638164B2 (en) Chord extenders for a wind turbine rotor blade assembly
US8523515B2 (en) Noise reducer for rotor blade in wind turbine
US8047784B2 (en) Lift device for rotor blade in wind turbine
AU2013231165B2 (en) Noise reduction tab and method for wind turbine rotor blade
US20120027588A1 (en) Root flap for rotor blade in wind turbine
US20110268558A1 (en) Noise reducer for rotor blade in wind turbine
EP2784301B1 (en) Rotor blade assembly for wind turbine having load reduction features
US20130280085A1 (en) Flow modification device for rotor blade in wind turbine
US9429139B2 (en) Transportation assembly for rotor blade
US10100805B2 (en) Tip extension assembly for a wind turbine rotor blade
EP3655645B1 (en) Airflow configuration for a wind turbine rotor blade
US20130064677A1 (en) Rotor blade assembly for wind turbine

Legal Events

Date Code Title Description
EEER Examination request

Effective date: 20191028

EEER Examination request

Effective date: 20191028

EEER Examination request

Effective date: 20191028

EEER Examination request

Effective date: 20191028

EEER Examination request

Effective date: 20191028

EEER Examination request

Effective date: 20191028