• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A rotor blade assembly (100) and a method for reducing the noise ofa rotor blade (16) for a wind turbine (10) are disciosed. The rotor blade (16) has surfaces defining a pressure side (22), a suction side (24), a leading edge (26), and a trailing edge (28) extending between a tip (32) and a root (34). The rotor blade assembly (100) further ineludes a noise reducer (110) configured on a surface of the rotor blade (16), the noise reducer (110) inciuding a plurality of noise reduction features (112). Each of the plurality of noise reduction features (112) inciudes a first surface (120) and a second surface (122). The first surface (120) inciudes a first portion (124) mounted to one of the pressure side (22) or the suction side (24) and a second portion (126) configured to interact with wind flowing past the other of the pres sure side (22) or the suction side (24). The second surface (122) interrupts an aerodynamic contour of the one of the pressure side (22) or the suction side (24).
    公开号:DK201270274A
    申请号:DKP201270274
    申请日:2012-05-23
    公开日:2012-12-01
    发明作者:Bonnet Laurent
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    NOISE REDUCER FOR ROTOR BLADE IN WIND TURBINE FIELD OF THE INVENTION
    The present disclosure relates generally to wind turbine rotor blades, and more particularly to noise reducers configured on the rotor blades.
    BACKGROUND OF THE INVENTION
    Wind power is considered one of the cleanest, most environmentally friendly energy sources presently available, and wind turbines have received 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.
    As rotor blades and wind turbines generally become capable of capturing increased kinetic energy, the acoustic noise associated with operation of the wind turbine may similarly increase. Thus, in many cases, known wind turbines and rotor blades may require that the amount of kinetic energy captured be compromised in order to prevent excessive associated noise. In many cases, noise reducers are attached to the rotor blades of wind turbines to reduce the noise and increase the efficiency associated with the rotor blades. These components may often be attached adjacent to the trailing edges of 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 rotor blades and associated noise reducers are designed for maximum lift and associated noise at only one operating point. The combination of a rotor blade and prior art noise reducer may adequately reduce noise at this operating point, but cannot be accurately adjusted to multiple operating points and / or extended ranges while reducing or maintaining the associated noise.
    Thus, an improved noise reducer for a rotor blade would be desired. For example, a noise reducer with improved noise reduction features would be advantageous.
    Specifically, a noise reducer with noise reduction features that have improved responses to wind flow over the noise reducer would be desired.
    LETTER DESCRIPTION OF THE INVENTION
    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.
    In one embodiment, a rotor blade assembly for a wind turbine is disclosed.
    The rotor blade has surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root. The rotor blade assembly further includes a noise reducer configured on a surface of the rotor blade, the noise reducer including a plurality of noise reduction features. Each of the plurality of noise reduction features includes a first surface and a second surface. The first surface includes a first portion mounted to one of the pressure side or the suction side and a second portion configured to interact with wind flow past the other of the pressure side or the suction side. The second surface interrupts an aerodynamic contour of either the pressure side or the suction side.
    [0007] In another embodiment, a method for reducing the noise of a rotor blade for a wind turbine is disclosed. The method includes mounting a noise reducer on a rotor blade, and rotating the rotor blade on the wind turbine. The noise reducer including a plurality of noise reduction features. Each of the plurality of noise reduction features includes a first surface and a second surface. The first surface includes a first portion mounted to one of the pressure side or the suction side and a second portion configured to interact with wind flow past the other of the pressure side or the suction side. The second surface interrupts an aerodynamic contour of either the pressure side or the suction side.
    These and other features, aspects and advantages of the present invention will be 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.
    LETTER DESCRIPTION OF THE DRAWINGS
    A foil 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: FIG. 1 is a perspective view of a wind turbine according to one embodiment of the present disclosure; FIG. 2 is a top view of a rotor blade assembly according to one embodiment of the present disclosure; FIG. 3 is a cross-sectional view, along lines 3-3 of FIG. 2, of a rotor blade assembly according to one embodiment of the present disclosure; FIG. 4 is a top view of a noise reducer according to one embodiment of the present disclosure; FIG. 5 is a rear view of the noise reducer of FIG. 4; FIG. 6 is a top view of a noise reducer according to another embodiment of the present disclosure; FIG. 7 is a rear view of the noise reducer of FIG. 6; and, FIG. 8 is a side view of a noise reducer according to one embodiment of the present disclosure.
    DETAILED DESCRIPTION OF THE INVENTION
    Reference will now 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.
    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.
    Referring to FIG. 2, a rotor blade 16 according to the present disclosure may include exterior surfaces defining a pressure side 22 and a suction side 24 (see FIGS. 3 through 5 and 7) 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.
    [0021] In some embodiments, the rotor blade 16 may include a plurality of individual blade segments aligned in an end-to-end order from blade tip 32 to 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.
    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 constructed 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 prebent 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.
    The rotor blade 16 may further define chord 42 and a span 44. As shown in FIGS. 2 and 4, the chord 42 may vary throughout the span 44 of the rotor blade 16. Thus, a local chord may be defined for the rotor blade 16 at any point on the rotor blade 16 along the span 44.
    Additionally, the rotor blade 16 may define an inner board area 52 and an outer board area 54. The inner board area 52 may be a spanwise portion of the rotor blade 16 extending from the root 34. For example, the inner board 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 outer board 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 inner board area 52 and the tip 32. Additionally or alternatively, the outer board 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.
    As illustrated in FIGS. 2 through 8, the present disclosure may further be directed to a rotor blade assembly 100. The rotor blade assembly 100 may include a noise reducer 110 and the rotor blade 16. In general, the noise reducer 110 may be configured on a surface of the rotor blade 16, and may 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. In an exemplary embodiment of the present disclosure, the noise reducer 110 may be configured on a surface of the rotor blade 16 adjacent to the trailing edge 28 of the rotor blade 16. Alternatively, the noise reducer 110 may be configured on a surface of the rotor blade 16 adjacent the leading edge 26 of the rotor blade 16, or adjacent to the tip 32 or the root 34 of the rotor blade 16, or at any other suitable position on the rotor blade 16.
    An exemplary embodiment, as shown in FIG. 2, the noise reducer 110 may be configured on, such as mounted to, the pressure side 22 of the rotor blade 16. In alternative embodiments, the noise reducer 110 may be configured on, such as mounted to, the suction side 24.
    [0027] As shown in FIGS. 2 and 4 through 7, the noise reducer 110 of the present disclosure includes a plurality of noise reduction features 112. In general, the noise reduction features 112 may interact with the wind flow past the noise reducer 110 when the rotor blade assembly 100 is in operation, and may reduce the noise associated with the rotor blade 16.
    In some embodiments, as shown in FIG. 2, the noise reducer 110 may include a base plate 114. In these embodiments, the base plate 114 may generally be that portion of the noise reducer 110 mounted on the rotor blade 16 to configure the noise reducer 110 on a surface of the rotor blade 16, and the noise reduction features 112 may extend from the base plate 114. In other words, the base gate 114 may mount each of the noise reduction features 112 to a surface of the rotor blade 16. Alternatively, the noise reduction features 112 may be mounted directly to the rotor blade 16, or may be an integral part of the rotor blade 16.
    The noise reducer 110 may, in some embodiments, be formed from a plurality of noise reducer sections. Each section may include one or more noise reduction features 112, and each section may further include a base plate portion. Alternatively, the noise reducer 110 may be a singular, unitary component.
    A noise reduction feature 112 generally includes a first surface 120 and a second surface 122. The first surface 120 includes a first portion 124 and a second portion 126, as shown in FIGS. 3 and 8. The first portion 124 is mounted on a surface of the rotor blade 16, such as the pressure side 22 or the suction side 24. FIG. 3, for example, illustrates a first portion 124 mounted to the suction side 24. Thus, the first portion 124 may have a generally aerodynamic contour corresponding to the aerodynamic contour of the surface to which it is mounted. Further, it should be noted that in embodiments the noise reducer 110 includes a base plate 114, the first portion 124 of a noise reduction feature 112 may be mounted to the base plate 114, and the base plate 114 may mount the first portion 124 to a surface of the rotor blade 16.
    [0031] In some embodiments, a first portion 124 may be mounted to a surface of the rotor blade 16 within the outer board area 54 of the rotor blade 16. Additionally or alternatively, a first portion 124 may be mounted to a surface of the rotor blade 16 within the inner board area 52 of the rotor blade 16, or at any suitable location on the rotor blade 16.
    The second portion 126 is configured to interact with wind flow past another surface of the rotor blade 16, such as the other of pressure side 22 or suction side 24. Thus, the second portion 126 is exposed to the wind flow , and may increase the chord 42 of the rotor blade assembly 100 at least at the locations of the noise reduction features 112 on the rotor blade assembly 100. FIG. 3, for example, illustrates a second portion 126 configured to interact with wind flow past the pressure side 22.
    If wind flows past the rotor blade assembly 100, the wind may flow past a surface of the rotor blade 16, and then flow past the second portions 126 of the noise reduction features 112. When the wind flows past the second portions 126, the wind may interact with the second portions 126, reducing the noise of the wind flow past the rotor blade assembly 100.
    The second surface 122 interrupts the aerodynamic contour of a surface of the rotor blade 16, such as the pressure side 22 or the suction side 24, as shown in FIGS. 2 through 7. FIG. 3, for example, illustrates a second surface 122 interrupting the aerodynamic contour of the suction side 24. For example, as shown, the second surface 122 of each of the noise reduction features 112, when the noise reducer 110 is mounted to a surface of the rotor blade 16 protrudes from that surface of the rotor blade 16, thus interrupting the aerodynamic contour of that surface. FIG. 3, for example, illustrates a second surface 122 interrupting the aerodynamic contour of the suction side 24. If wind flows past the rotor blade assembly 100, the wind may flow past a surface of the rotor blade 16, and then flow past the second surface 122 of the noise reduction features 112. When the wind flows past the second surfaces 122, the wind may interact with the second surfaces 122, reducing the noise of the wind flow past the rotor blade assembly 100.
    In some embodiments, the second surface 122 of a noise reduction feature 112 may have a generally curvilinear cross-sectional profile, as shown in FIGS. 3 and 8.
    Alternatively, the second surface 122 may have a generally linear cross-sectional profile or any other suitable cross-sectional profile.
    [0035] As shown in FIGS. 4 through 7, each of the plurality of second surfaces 122 defines a width 130, a height 132, and a length 134. In some embodiments, the width 130 of a second surface 122 may taper in various directions throughout various portions of the length 134 For example, as shown in FIGS. 4 and 6, the width 130 may taper in the direction of the wind flow through a portion of the length 134 and / or taper in the opposite direction of the wind flow through a portion of the length 134. In some embodiments, the portion that tapers in the direction of the wind flow may be a downstream portion of the second surface 122, such as a downstream fourth, a downstream third, a downstream half, or any other suitable downstream portion of the second surface 122. In other embodiments, the portion that tapers in the direction of the wind flow may be an upstream portion, or any other suitable portion of the second surface 122. Additionally or alternatively, in some embodiments, the portion that tapers in the opposite direction of the wind flow may be upstream portion of the second surface 122, such as an upstream fourth, an upstream third, an upstream half, or any other suitable upstream portion of the second surface 122. In other embodiments, the portion that tapers in the direction of the wind flow may be a downstream portion, or any other suitable portion of the second surface 122.
    Further, in some embodiments, the height 132 of a second surface 122 may taper in various directions throughout various portions of the length 134. For example, as shown in FIGS. 5 and 7, the height 132 may taper in the direction of the wind flow through a portion of the length 134 and / or taper in the opposite direction of the wind flow through a portion of the length 134. In some embodiments, the portion that tapers in the direction of the wind flow may be a downstream portion of the second surface 122, such as a downstream fourth, a downstream third, a downstream half, or any other suitable downstream portion of the second surface 122. In other embodiments, the portion that tapers in the direction of the wind flow may be an upstream portion, or any other suitable portion of the second surface 122. Additionally or alternatively, in some embodiments, the portion that tapers in the opposite direction of the wind flow may be upstream portion of the second surface 122, such as an upstream fourth, an upstream third, an upstream half, or any other suitable upstream portion of the second surface 122. In other embodiments, the portion that tapers in the direction o The wind flow may be a downstream portion, or any other suitable portion of the second surface 122.
    Each noise reduction feature 112 may have a similar shape and size, or various groups of noise reduction features 112 may have similar shapes and sizes, or each noise reduction feature 112 may have an individual shape and size. In some exemplary embodiments, for example, the noise reducer 110 may include a plurality of noise reduction features 112. The plurality of noise reduction features 112 may include a first noise reduction feature 142 and a second noise reduction feature 144, or a plurality of first noise reduction features 142 and second noise reduction features 144, as shown in FIGS. 6 and 7. In some embodiments, the first noise reduction features 142 may each have a first aspect ratio, and the second noise reduction features 144 may each have a second aspect ratio different from the first aspect ratio. Additionally or alternatively, the first noise reduction features 142 may have generally identical or different widths 130, heights 132, and / or lengths 134, and the second noise reduction features 144 may have generally identical or different widths 130, heights 132, and / or lengths 134. Further, the widths 130, heights 132, and / or lengths 134 of the first noise reduction features 142 may be identical to or different from the widths 130, heights 132, and / or lengths 134 of the second noise reduction features 144 Additionally or alternatively, the first noise reduction features 142 may have generally identical or different shapes, and the second noise reduction features 144 may have generally identical or different shapes. Further, the shapes of the first noise reduction features 142 may be identical to or different from the shapes of the second noise reduction features 144. In exemplary embodiments, the first noise reduction features 142 and second noise reduction features 144 may alternate through the length, or any portion thereof, of the noise reducer 110. Alternatively, the first noise reduction features 142 and second noise reduction features 144 may be defined in any suitable arrangement or pattern.
    [0038] Further, it should be understood that the present disclosure is not limited to first noise reduction features 142 and second noise reduction features 144, and rather that any suitable number of noise reduction feature groups with any suitable aspect ratios or other features and in any suitable arrangement is within the scope and spirit of the present disclosure.
    As shown in FIG. 8, in some embodiments, the noise reducer 110 of the present disclosure may further include a first layer 152 and a second layer 154. The first layer 152 may include the mount portion 124 and the second surface 122, and the second layer 154 may include the second portion 126. Alternatively, each of the first layer 152 and the second layer 154 may include any suitable layer or portion of a layer.
    One of the first layer 152 or the second layer 154, such as in exemplary embodiments the first layer 152, may be formed from an acoustic absorption material. The acoustic absorption material may absorb noise associated with the rotor blade 16 and rotor blade assembly 100 by absorbing a portion of the noise. For example, the acoustic absorption material may be a generally acoustically porous material. Acoustically porous material allows air to permeate the material, and the frictional interaction between the acoustically porous material and the air absorbs, dissipates, and thus reduces the noise. The acoustically porous material may be, for example, an acoustically porous cell foam material such as polyurethane foam, polyether foam, melamine foam, or any other suitable foam. Alternatively, the acoustically porous material may be, for example, an acoustically porous natural fiber material agglomerate, such as wood fiber, coconut fiber, or any other suitable fiber. Alternatively, the acoustically porous material may be, for example, a single or multi-layer cloth material, such as cotton, linen, hemp, or any other suitable cloth material. It should be understood, however, that the acoustic absorption material according to the present disclosure is not limited to the above disclosed materials, and rather that any suitable acoustically absorbable materials are within the scope and spirit of the present disclosure.
    Further, in exemplary embodiments, the layer formed from the acoustic absorption material may have an absorption coefficient. In exemplary embodiments, the absorption coefficient may be in the range between approximately 0.6 and 1.0. However, it should be understood that the absorption coefficient is not limited to the range disclosed above, and rather that any suitable range is within the scope and spirit of the present disclosure.
    [0042] The other of the first layer 152 or the second layer 154, such as in exemplary embodiments the second layer 154, perhaps formed from a material which is stiffer and / or stronger than the material of the first layer 152 or the second layer 154. This material may act as a protective layer and / or strengthening or stiffening layer for the noise reducer 110. Further, in exemplary embodiments, the material may be acoustically non-porous. Thus, the material may be, for example, a polymer, such as a thermoplastic, a fiber or woven-fiber reinforced plastic, a metal, or any other suitable material. Further, in exemplary embodiments, the other of the first layer 152 or the second layer 154 comprising this material may be relatively thin compared to the first layer 152 or the second layer 154.
    In exemplary embodiments, the noise reducer 110 is adaptable to the wind flow past the rotor blade assembly 100. For example, wind flow past the rotor blade assembly 100 forms flow streamlines. A mean flow streamline may be further calculated, as is generally known in the art. Further the flow streamlines and / or mean flow streamline may change based on the angle of attack of the rotor blade 16. The noise reducer 110, such as the layer or layers of materials thereof, may have a desired flexibility such that the noise reducer 110 conforms to a flow streamline or mean flow streamline during operation of the turbine 10. For example, the downstream end of the second portion 126 may bend in the direction of the pressure side 22 or suction side 24 depending on the orientation of the noise reducer 110 and / or the angle of attack and due to the flow streamlines and / or mean flow streamline. In exemplary embodiments, the noise reducer 110 is thus adaptable to the mean flow streamline.
    [0044] It should be understood that the noise reducer 110 of the present disclosure may be mounted to rotor blades 16 during manufacture of the rotor blade 16, or may be retro-fit to existing rotor blades 16 to form rotor blade assemblies 100 The rotor blade assembly 100 including a rotor blade 16 and noise reducer 110 may desirably have decreased noise for a given wind flow.
    The present disclosure is further directed to a method for reducing the noise of a rotor blade 16 for a wind turbine 10. The method may include mounting a noise reducer 110 to the rotor blade 16, as discussed above. The method may further include rotating the rotor blade 16 on the wind turbine 10, as discussed above.
    This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples which occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
    244160-2 (GEC-268B) COMPONENT LIST
    权利要求:
    Claims (15)
    [1] 1. A rotor blade assembly (100) for a wind turbine (10), comprising: a rotor blade (16) having surfaces defining a pressure side (22), a suction side (24), a leading edge (26), and a trailing edge (28) extending between a tip (32) and a root (34); and, a noise reducer (110) configured on a surface of the rotor blade (16), the noise reducer (110) comprising a plurality of noise reduction features (112), each of the plurality of noise reduction features (112) comprising: a first surface (120) comprising a first portion (124) mounted to one of the pressure side (22) or the suction side (24) and a second portion (126) configured to interact with wind flowing past the other of the pressure side (22) or the suction side (24); and, a second surface (122) interrupting an aerodynamic contour of the one of the pressure side (22) or the suction side (24).
    [2] 2. The rotor blade assembly (100) of claim 1, wherein each of the plurality of second surfaces (122) defines a width (130) and a length (134), and wherein the width (130) tapers in the direction of the wind flow through a portion of the length (134).
    [3] 3. The rotor blade assembly (100) of any of claims 1-2, wherein each of the plurality of second surfaces (122) defines a height (132) and a length (134), and wherein the height (132) tapers in the direction of the wind flow through a portion of the length (134).
    [4] 4. The rotor blade assembly (100) of any of claims 1-3, wherein the second surface (122) has a generally curvilinear cross-sectional profile.
    [5] 5. The rotor blade assembly (100) of any of claims 1-4, wherein the first portion (124) is mounted to the suction side (24), the second portion (126) is configured to interact with wind flowing past the pressure side (22), and the second surface (122) interrupts the aerodynamic contour of the suction side (24).
    [6] 6. The rotor blade assembly (100) of any of claims 1-5, wherein the plurality of noise reduction features (112) comprise a first noise reduction feature (142) having a first aspect ratio and a second noise reduction feature (144) having a second aspect ratio.
    [7] 7. The rotor blade assembly (100) of any of claims 1-6, wherein the noise reducer (110) further comprises a base plate (114) mounting each of the plurality of first portions (124) to the one of the pressure side (22) or the suction side (24).
    [8] 8. The rotor blade assembly (100) of any of claims 1-7, wherein the first portion (124) is mounted within an outer board area (54) of the rotor blade (16).
    [9] 9. The rotor blade assembly (100) of any of claims 1-8, wherein the noise reducer (110) is configured adjacent the trailing edge (28) of the rotor blade (16).
    [10] 10. The rotor blade assembly (100) of any of claims 1-9, wherein the noise reducer (110) further comprises a first layer (152) and a second layer (154), the first layer (152) comprising the first portion (124) and second surface (122) of each of the plurality of noise reduction features (112) and the second layer (154) comprising the second portion (126).
    [11] 11. The rotor blade assembly (100) of claim 10, wherein the first layer (152) is formed from an acoustic absorption material, and wherein the second layer (154) is at least one of stiffer or stronger than the first layer (152).
    [12] 12. The rotor blade assembly (100) of any of claims 10-11, wherein the first layer (152) has an absorption coefficient in the range between approximately 0.6 and approximately 1.0.
    [13] 13. The rotor blade assembly (100) of any of claims 10-12, wherein the second layer (154) is acoustically non-porous.
    [14] 14. A wind turbine (10), comprising: a plurality of rotor blades (16), each of the plurality of rotor blades (16) having surfaces defining a pressure side (22), a suction side (24), a leading edge (26), and a trailing edge (28) extending between a tip (32) and a root (34); and, a noise reducer (110) configured on a surface of at least one of the plurality of rotor blades (16), the noise reducer (110) comprising a plurality of noise reduction features (112), each of the plurality of noise reduction features (112) comprising: a first surface (120) comprising a first portion (124) mounted to one of the pressure side (22) or the suction side (24) and a second portion (126) configured to interact with wind flowing past the other of the pressure side (22) or the suction side (24); and, a second surface (122) interrupting an aerodynamic contour of the one of the pressure side (22) or the suction side (24).
    [15] 15. A method for reducing the noise of a rotor blade (16) for a wind turbine (10), the method comprising: mounting a noise reducer (110) on a rotor blade (16), the noise reducer (110) comprising a plurality of noise reduction features (112), each of the plurality of noise reduction features (112) comprising a first surface (120) comprising a first portion (124) mounted to one of a pressure side (22) or a suction side (24) of the rotor blade (16) and a second portion (126) configured to interact with wind flowing past the other of the pressure side (22) or the suction side (24), and a second surface (122) interrupting an aerodynamic contour of the one of the pressure side (22) or the suction side (24); and, rotating the rotor blade (16) on the wind turbine (10).
    类似技术:
    公开号 | 公开日 | 专利标题
    US8414261B2|2013-04-09|Noise reducer for rotor blade in wind turbine
    US8047784B2|2011-11-01|Lift device for rotor blade in wind turbine
    EP2795107B1|2019-09-18|Noise reducer for rotor blade in wind turbine
    DK177659B1|2014-02-03|Noise reducer for rotor blade in wind turbine
    US7976283B2|2011-07-12|Noise reducer for rotor blade in wind turbine
    US7976276B2|2011-07-12|Noise reducer for rotor blade in wind turbine
    DK178192B1|2015-08-03|Noise reduction device for rotor blades in a wind turbine
    AU2013222047B2|2017-02-16|Attachment system for a wind turbine rotor blade accessory
    US9377005B2|2016-06-28|Airfoil modifiers for wind turbine rotor blades
    US7997875B2|2011-08-16|Winglet for wind turbine rotor blade
    US20110268558A1|2011-11-03|Noise reducer for rotor blade in wind turbine
    US20120027588A1|2012-02-02|Root flap for rotor blade in wind turbine
    EP2657513A2|2013-10-30|Flow modification device for rotor blade in wind turbine
    US9523279B2|2016-12-20|Rotor blade fence for a wind turbine
    EP2716906A2|2014-04-09|Noise reduction tab and method for wind turbine rotor blade
    US20110150664A1|2011-06-23|Aeroacoustic rotor blade for a wind turbine, and wind turbine equipped therewith
    US20150139810A1|2015-05-21|Noise reducing extension plate for rotor blade in wind turbine
    US7854595B2|2010-12-21|Wind turbine blade tip shapes
    US20110211952A1|2011-09-01|Rotor blade for wind turbine
    US10767623B2|2020-09-08|Serrated noise reducer for a wind turbine rotor blade
    JP5996083B2|2016-09-21|Wind turbine blade and manufacturing method thereof
    同族专利:
    公开号 | 公开日
    CN102808725B|2015-07-29|
    DE102012104604A1|2012-12-06|
    US8414261B2|2013-04-09|
    DK178197B1|2015-08-03|
    US20120027590A1|2012-02-02|
    CN102808725A|2012-12-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2899128A|1959-08-11|Vaghi |
    US175355A|1876-03-28|Waltee king |
    USRE19412E|1935-01-01|Aircraft and control thereof |
    US573562A|1896-12-22|Propeller |
    US1861065A|1930-08-18|1932-05-31|Poot Philippe|Screw-propeller for flying machines and other aerodynamics apparatus|
    US2071012A|1932-11-22|1937-02-16|Adams Herbert Luther|Noiseless device|
    US2238749A|1939-01-30|1941-04-15|Clarence B Swift|Fan blade|
    US2225312A|1939-10-05|1940-12-17|Bell Telephone Labor Inc|Acoustic device|
    US2312219A|1941-04-21|1943-02-23|Sensenich Brothers|Aircraft propeller|
    US2469167A|1946-06-11|1949-05-03|American Steel & Wire Co|Vibration damper|
    US2616509A|1946-11-29|1952-11-04|Thomas Wilfred|Pneumatic airfoil|
    IT1036993B|1974-07-02|1979-10-30|Rotron Inc|DEVICE FOR THE MOVEMENT OF A FLUID|
    US4204629A|1977-07-20|1980-05-27|Rolls-Royce Limited|Brush seal and a method of manufacture|
    US4618313A|1980-02-06|1986-10-21|Cofimco S.R.L.|Axial propeller with increased effective displacement of air whose blades are not twisted|
    GB8626408D0|1986-11-05|1987-12-16|Secr Defence|Damping treatment for pipes & bodies|
    US4720244A|1987-05-21|1988-01-19|Hudson Products Corporation|Fan blade for an axial flow fan and method of forming same|
    US5088665A|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|1992-07-09|1994-06-14|Northern Power Systems, Inc.|Wind turbine rotor aileron|
    US5328329A|1993-07-06|1994-07-12|Hudson Products Corporation|Fan blade width extender|
    NL9301910A|1993-11-04|1995-06-01|Stork Prod Eng|Wind turbine.|
    US5522266A|1993-11-30|1996-06-04|Medex, Inc.|Low cost pressure transducer particularly for medical applications|
    CA2141529A1|1994-10-25|1996-04-26|Frances Gould|Street sweeper brush assembly|
    US6352601B1|1994-12-27|2002-03-05|The B. F. Goodrich Company|Self-adhering ice protector|
    DE19647102A1|1996-11-14|1998-05-20|Philippe Arribi|Flow body|
    JP2000120524A|1998-10-16|2000-04-25|Mitsubishi Heavy Ind Ltd|Windmill blade|
    NZ511846A|1998-12-09|2003-07-25|Aloys Wobben|Reduction in the noise produced by a rotor blade of a wind turbine|
    GB2358130A|2000-01-17|2001-07-18|Llewellyn Jones John Adrian|One-piece toothbrush|
    DE10020177A1|2000-04-25|2001-11-08|Daimler Chrysler Ag|Device for reducing noise on aircraft wings|
    BR0003706A|2000-05-30|2002-02-13|Tecsis Tecnologia E Sist S Ava|Axle fan for low noise and high efficiency|
    DE10027938A1|2000-05-31|2001-12-13|Dlr Ev|Aerofoil section with lift-increasing trailing edge, in which trailing edge has spoilers on one or both sides to cause flow breakaway|
    US6733240B2|2001-07-18|2004-05-11|General Electric Company|Serrated fan blade|
    EP3219981B1|2001-07-19|2021-09-01|Vestas Wind Systems A/S|Wind turbine blade|
    DE10157849A1|2001-11-24|2003-06-12|Airbus Gmbh|Arrangement for reducing the aerodynamic noise on a slat of a commercial aircraft|
    US6872048B2|2001-11-26|2005-03-29|Lennox Industries, Inc.|Fan with reduced noise generation|
    US7059833B2|2001-11-26|2006-06-13|Bonus Energy A/S|Method for improvement of the efficiency of a wind turbine rotor|
    EP1338793A3|2002-02-22|2010-09-01|Mitsubishi Heavy Industries, Ltd.|Serrated wind turbine blade trailing edge|
    JP2003254225A|2002-03-05|2003-09-10|Ebara Corp|Device for reducing airflow noise of windmill|
    DK1613860T3|2003-03-31|2016-02-01|Univ Denmark Tech Dtu|Managing energy, performance and / or stability of a wind turbine with horizontal axis of use of variable vane geometry management|
    DE102004008618A1|2004-02-21|2005-09-08|Geka Brush Gmbh|Brush for applying cosmetic or nourishing products|
    US7328770B2|2005-06-16|2008-02-12|Owens Jeffrey A|Strap silencer|
    US7637721B2|2005-07-29|2009-12-29|General Electric Company|Methods and apparatus for producing wind energy with reduced wind turbine noise|
    MX2008002475A|2005-08-22|2008-09-10|Viryd Technologies Inc|Fluid energy converter.|
    ES2318925B1|2005-09-22|2010-02-11|GAMESA INNOVATION & TECHNOLOGY, S.L.|AEROGENERATOR WITH A BLADE ROTOR THAT REDUCES NOISE.|
    US7458777B2|2005-09-22|2008-12-02|General Electric Company|Wind turbine rotor assembly and blade having acoustic flap|
    DK176352B1|2005-12-20|2007-09-10|Lm Glasfiber As|Profile series for blade for wind turbines|
    NL1031223C1|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|2006-04-13|2008-03-13|Repower Systems Ag|Rotor blade of a wind turbine|
    US7740206B2|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|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.|
    US20080001363A1|2006-06-28|2008-01-03|General Electric Company|Brush sealing system and method for rotary machines|
    EP1892442A1|2006-08-18|2008-02-27|Siemens Aktiengesellschaft|Brush seal for a turbomachine|
    WO2008108881A2|2006-09-08|2008-09-12|Steven Sullivan|Method and apparatus for mitigating trailing vortex wakes of lifting or thrust generating bodies|
    DE102006043462A1|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|2006-09-29|2011-06-14|General Electric Company|Wind turbine rotor blade with acoustic lining|
    US7811063B2|2006-11-03|2010-10-12|General Electric Company|Damping element for a wind turbine rotor blade|
    EP1927454A1|2006-11-29|2008-06-04|Trisa Holding AG|Toothbrush with partially coated surface|
    US20080166241A1|2007-01-04|2008-07-10|Stefan Herr|Wind turbine blade brush|
    US7918653B2|2007-02-07|2011-04-05|General Electric Company|Rotor blade trailing edge assemby and method of use|
    US7413408B1|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|2007-03-20|2008-09-25|Vestas Wind Systems A/S|Slow rotating wind turbine rotor with slender blades|
    WO2008131800A1|2007-04-30|2008-11-06|Vestas Wind Systems A/S|A wind turbine blade|
    ES2345583B1|2007-05-31|2011-07-28|GAMESA INNOVATION & TECHNOLOGY, S.L.|AEROGENERATOR SHOVEL WITH ANTI-NOISE DEVICES.|
    US7927078B2|2007-07-12|2011-04-19|General Electric Company|Wind turbine blade tip vortex breakers|
    NL2000821C2|2007-08-17|2009-02-18|Stichting Energie|Wind turbine and rotor blade.|
    EP2031242A1|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|
    EP2031244A1|2007-08-31|2009-03-04|Lm Glasfiber A/S|Means to maintain flow of a flowing medium attached to the exterior of a flow control member by use of crossing sub-channels|
    US20090074585A1|2007-09-19|2009-03-19|General Electric Company|Wind turbine blades with trailing edge serrations|
    US20090097976A1|2007-10-15|2009-04-16|General Electric Company|Active damping of wind turbine blades|
    EP2053240B1|2007-10-22|2011-03-30|Actiflow B.V.|Wind turbine with boundary layer control|
    US8418967B2|2008-02-21|2013-04-16|Cornerstone Research Group, Inc.|Passive adaptive structures|
    GB2462308A|2008-08-01|2010-02-03|Vestas Wind Sys As|Extension portion for wind turbine blade|
    MX2010011336A|2008-08-06|2010-11-30|Mitsubishi Heavy Ind Ltd|Windmill blade and wind power generator using same.|
    US9239039B2|2008-10-27|2016-01-19|General Electric Company|Active circulation control of aerodynamic structures|
    EP2138714A1|2008-12-12|2009-12-30|Lm Glasfiber A/S|Wind turbine blade having a flow guiding device with optimised height|
    US20100143151A1|2009-02-06|2010-06-10|General Electric Company|Permeable acoustic flap for wind turbine blades|
    EP2253838A1|2009-05-18|2010-11-24|Lm Glasfiber A/S|A method of operating a wind turbine|
    EP2253839A1|2009-05-18|2010-11-24|Lm Glasfiber A/S|Wind turbine blade provided with flow altering devices|
    CA2763898A1|2009-06-03|2010-12-09|Flodesign Wind Turbine Corp.|Wind turbine blades with mixer lobes|
    EP2270312A1|2009-07-01|2011-01-05|PEM-Energy Oy|Aero- or hydrodynamic construction|
    US7976276B2|2010-11-04|2011-07-12|General Electric Company|Noise reducer for rotor blade in wind turbine|
    US7976283B2|2010-11-10|2011-07-12|General Electric Company|Noise reducer for rotor blade in wind turbine|
    US8267657B2|2010-12-16|2012-09-18|General Electric Company|Noise reducer for rotor blade in wind turbine|
    US8047784B2|2011-03-22|2011-11-01|General Electric Company|Lift device for rotor blade in wind turbine|
    US8414261B2|2011-05-31|2013-04-09|General Electric Company|Noise reducer for rotor blade in wind turbine|US8523515B2|2010-11-15|2013-09-03|General Electric Company|Noise reducer for rotor blade in wind turbine|
    DK2712399T3|2011-05-16|2017-03-13|Lm Wp Patent Holding As|WINDMILL LIVES WITH NOISE REDUCING DEVICES AND RELATED PROCEDURE|
    US8414261B2|2011-05-31|2013-04-09|General Electric Company|Noise reducer for rotor blade in wind turbine|
    US8834127B2|2011-09-09|2014-09-16|General Electric Company|Extension for rotor blade in wind turbine|
    US8304926B2|2011-09-16|2012-11-06|General Electric Company|Wind turbine sound management|
    US8506250B2|2011-10-19|2013-08-13|General Electric Company|Wind turbine rotor blade with trailing edge extension and method of attachment|
    US9341158B2|2011-12-08|2016-05-17|Inventus Holdings, Llc|Quiet wind turbine blade|
    US9014861B2|2011-12-20|2015-04-21|General Electric Company|Method and system for noise-controlled operation of a wind turbine|
    EP2631467B1|2012-02-24|2015-10-14|Siemens Aktiengesellschaft|Arrangement to reduce noise originated by a wind turbine blade|
    ES2621859T3|2012-06-28|2017-07-05|Nordex Energy Gmbh|Wind turbine rotor blade with a thick profile outlet edge|
    US9458821B2|2012-09-11|2016-10-04|General Electric Company|Attachment system for a wind turbine rotor blade accessory|
    US10012207B2|2012-09-24|2018-07-03|Siemens Aktiengesellschaft|Wind turbine blade noise reduction teeth with stiffening rib|
    GB2506194B|2012-09-25|2014-08-06|Messier Dowty Ltd|Aircraft component noise reducing patch|
    US9677537B2|2013-03-28|2017-06-13|General Electric Company|Acoustic shield for noise reduction in wind turbines|
    US9556849B2|2013-05-02|2017-01-31|General Electric Company|Attachment system and method for wind turbine vortex generators|
    US20150050154A1|2013-05-23|2015-02-19|Kristian R. DIXON|Airfoil trailing edge apparatus for noise reduction|
    DK177928B1|2013-06-17|2015-01-19|Envision Energy Denmark Aps|Wind turbine blade with extended shell section|
    US9726029B2|2013-07-18|2017-08-08|Hamilton Sundstrand Corporation|Fluid cooling arrangement for a gas turbine engine and method|
    NL2011236C2|2013-07-30|2015-02-02|Stichting Energie|Rotor blade for a wind turbine, and wind turbine field.|
    EP2851553B1|2013-09-18|2018-02-14|Siemens Aktiengesellschaft|Arrangement to reduce noise of a wind turbine rotor blade|
    US9638164B2|2013-10-31|2017-05-02|General Electric Company|Chord extenders for a wind turbine rotor blade assembly|
    US9494134B2|2013-11-20|2016-11-15|General Electric Company|Noise reducing extension plate for rotor blade in wind turbine|
    CN106414999A|2014-05-06|2017-02-15|西门子公司|Noise reduction means for a rotor blade of a wind turbine|
    GB201410675D0|2014-06-16|2014-07-30|Univ Brunel|Noise reduction to the trailing edge of fluid dynamic bodies|
    US11181093B2|2014-06-18|2021-11-23|Siemens Gamesa Renewable Energy A/S|Rotor blade with noise reduction means|
    EP3164599B1|2014-07-03|2019-04-17|LM WP Patent Holding A/S|A wind turbine blade|
    ES2848858T3|2014-08-05|2021-08-12|Biomerenewables Inc|Wind turbine rotor blade|
    US9849976B2|2014-08-19|2017-12-26|The Boeing Company|Noise reducing profile for helicopter rotor blade tracking wedges|
    CN107073756A|2014-09-15|2017-08-18|远景能源（江苏）有限公司|The wind turbine blade of customizable chord length|
    JP6101240B2|2014-10-17|2017-03-22|三菱重工業株式会社|Rear edge side panel|
    US10180125B2|2015-04-20|2019-01-15|General Electric Company|Airflow configuration for a wind turbine rotor blade|
    US9869295B2|2015-05-07|2018-01-16|General Electric Company|Attachment method to install components, such as tip extensions and winglets, to a wind turbine blade, as well as the wind turbine blade and component|
    US9869296B2|2015-05-07|2018-01-16|General Electric Company|Attachment method and system to install components, such as tip extensions and winglets, to a wind turbine blade|
    US9869297B2|2015-05-07|2018-01-16|General Electric Company|Attachment method and system to install components, such as vortex generators, to a wind turbine blade|
    ES2864028T3|2015-05-21|2021-10-13|Siemens Gamesa Renewable Energy As|Toothed rotor blade for wind turbine|
    GB201512688D0|2015-07-20|2015-08-26|Rolls Royce Plc|Aerofoil|
    DE102015012427A1|2015-09-25|2017-03-30|Senvion Gmbh|Rotor blade with a sound-optimized profile and method for producing a rotor blade|
    US10100805B2|2015-10-12|2018-10-16|General Electric Compant|Tip extension assembly for a wind turbine rotor blade|
    US10421533B2|2015-11-06|2019-09-24|Lockheed Martin Corporation|Panels comprising uneven edge patterns for reducing boundary layer separation|
    US10240576B2|2015-11-25|2019-03-26|General Electric Company|Wind turbine noise reduction with acoustically absorbent serrations|
    EP3181895A1|2015-12-17|2017-06-21|LM WP Patent Holding A/S|Splitter plate arrangement for a serrated wind turbine blade|
    US10460717B2|2015-12-18|2019-10-29|Amazon Technologies, Inc.|Carbon nanotube transducers on propeller blades for sound control|
    US10933988B2|2015-12-18|2021-03-02|Amazon Technologies, Inc.|Propeller blade treatments for sound control|
    US10011346B2|2015-12-18|2018-07-03|Amazon Technologies, Inc.|Propeller blade indentations for improved aerodynamic performance and sound control|
    US10259562B2|2015-12-18|2019-04-16|Amazon Technologies, Inc.|Propeller blade trailing edge fringes for improved sound control|
    US10259574B2|2015-12-18|2019-04-16|Amazon Technologies, Inc.|Propeller surface area treatments for sound dampening|
    US20170174321A1|2015-12-18|2017-06-22|Amazon Technologies, Inc.|Propeller treatments for sound dampening|
    US10099773B2|2015-12-18|2018-10-16|Amazon Technologies, Inc.|Propeller blade leading edge serrations for improved sound control|
    EP3736207A1|2015-12-18|2020-11-11|Amazon Technologies, Inc.|Propeller blade treatments for sound control|
    DE102016201114A1|2016-01-26|2017-07-27|Wobben Properties Gmbh|Rotor blade of a wind turbine and wind turbine|
    US10400744B2|2016-04-28|2019-09-03|General Electric Company|Wind turbine blade with noise reducing micro boundary layer energizers|
    EP3472456B1|2016-06-20|2020-12-09|LM Wind Power International Technology II ApS|Wind turbine blade with tip end serrations|
    CN106402023B|2016-09-27|2018-10-19|孙新年|A kind of bionical preparation blade|
    US10487796B2|2016-10-13|2019-11-26|General Electric Company|Attachment methods for surface features of wind turbine rotor blades|
    US10443579B2|2016-11-15|2019-10-15|General Electric Company|Tip extensions for wind turbine rotor blades and methods of installing same|
    US10465652B2|2017-01-26|2019-11-05|General Electric Company|Vortex generators for wind turbine rotor blades having noise-reducing features|
    US11098691B2|2017-02-03|2021-08-24|General Electric Company|Methods for manufacturing wind turbine rotor blades and components thereof|
    US10830206B2|2017-02-03|2020-11-10|General Electric Company|Methods for manufacturing wind turbine rotor blades and components thereof|
    DE102017107459A1|2017-04-06|2018-10-11|Teg Tubercle Engineering Group Gmbh|Rotor blade for a wind turbine and the wind turbine|
    DE102017107465A1|2017-04-06|2018-10-11|Teg Tubercle Engineering Group Gmbh|Profile body for generating dynamic buoyancy, rotor blade with the profile body and method for profiling the profile body|
    EP3406892A1|2017-05-22|2018-11-28|LM Wind Power International Technology II ApS|A wind turbine blade comprising a noise reducing device|
    US10821652B2|2017-11-21|2020-11-03|General Electric Company|Vacuum forming mold assembly and method for creating a vacuum forming mold assembly|
    US10913216B2|2017-11-21|2021-02-09|General Electric Company|Methods for manufacturing wind turbine rotor blade panels having printed grid structures|
    US10773464B2|2017-11-21|2020-09-15|General Electric Company|Method for manufacturing composite airfoils|
    US11040503B2|2017-11-21|2021-06-22|General Electric Company|Apparatus for manufacturing composite airfoils|
    US10865769B2|2017-11-21|2020-12-15|General Electric Company|Methods for manufacturing wind turbine rotor blade panels having printed grid structures|
    US10920745B2|2017-11-21|2021-02-16|General Electric Company|Wind turbine rotor blade components and methods of manufacturing the same|
    US11248582B2|2017-11-21|2022-02-15|General Electric Company|Multiple material combinations for printed reinforcement structures of rotor blades|
    US10821696B2|2018-03-26|2020-11-03|General Electric Company|Methods for manufacturing flatback airfoils for wind turbine rotor blades|
    US11035339B2|2018-03-26|2021-06-15|General Electric Company|Shear web assembly interconnected with additive manufactured components|
    US10767623B2|2018-04-13|2020-09-08|General Electric Company|Serrated noise reducer for a wind turbine rotor blade|
    CN110500234B|2018-05-18|2020-07-03|北京金风科创风电设备有限公司|Method and device for noise control of wind generating set|
    EP3587799A1|2018-06-27|2020-01-01|Siemens Gamesa Renewable Energy A/S|Aerodynamic structure|
    US10746157B2|2018-08-31|2020-08-18|General Electric Company|Noise reducer for a wind turbine rotor blade having a cambered serration|
    US11163302B2|2018-09-06|2021-11-02|Amazon Technologies, Inc.|Aerial vehicle propellers having variable force-torque ratios|
    DE102018127367A1|2018-11-02|2020-05-07|Wobben Properties Gmbh|Rotor blade for a wind turbine and wind turbine|
    GB201906920D0|2019-05-16|2019-07-03|Univ Brunel|Method of reducing noise from an aerofoil|
    NL2025831B1|2020-06-15|2022-02-16|Univ Delft Tech|Wind turbine blade|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US201113149513|2011-05-31|
    US13/149,513|US8414261B2|2011-05-31|2011-05-31|Noise reducer for rotor blade in wind turbine|
    [返回顶部]