IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0984222
(2011-01-04)
|
등록번호 |
US-8240993
(2012-08-14)
|
발명자
/ 주소 |
- Bhaisora, Shailesh Singh
- Shastri, Narasimha
- Gupta, Anurag
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
9 |
초록
▼
An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade. The wind turbine rotor blade includes at least one sidewall that defines a cavity therein. The sidewall extends between a leading edge and an axially-spaced trailing edge, and defines a chordwise a
An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade. The wind turbine rotor blade includes at least one sidewall that defines a cavity therein. The sidewall extends between a leading edge and an axially-spaced trailing edge, and defines a chordwise axis between the leading edge and the trailing edge. The air distribution system includes a plurality of bleed flow assemblies that are positioned within the rotor blade and are configured to discharge air into the boundary layer to reduce a separation of the boundary layer from the rotor blade. Each bleed flow assembly of the plurality of bleed flow assemblies includes a bleed flow conduit that is coupled to an inner surface of the sidewall and is oriented with respect to the chordwise axis between the leading edge and the trailing edge. The bleed flow conduit is configured to channel air through the rotor blade. An inlet aperture is defined through the bleed flow conduit and through the sidewall to channel air into the bleed flow conduit. An outlet aperture is defined through the bleed flow conduit and through the sidewall to discharge air from the bleed flow conduit and into the boundary layer.
대표청구항
▼
1. An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade, the wind turbine rotor blade having at least one sidewall defining a cavity therein, the sidewall extending between a leading edge and an axially spaced trailing edge and defining a chordwise ax
1. An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade, the wind turbine rotor blade having at least one sidewall defining a cavity therein, the sidewall extending between a leading edge and an axially spaced trailing edge and defining a chordwise axis between the leading edge and the trailing edge, said air distribution system comprising: at least one bleed flow assembly positioned within the cavity and configured to discharge air into the boundary layer to reduce a separation of the boundary layer from the rotor blade, each bleed flow assembly comprising:a bleed flow conduit coupled to an inner surface of the sidewall and oriented with respect to the chordwise axis between the leading edge and the trailing edge, said bleed flow conduit configured to channel air through the rotor blade;an inlet aperture extending through the sidewall proximate the leading edge to channel air into said bleed flow conduit; andan outlet aperture extending through the sidewall proximate the trailing edge to discharge air from said bleed flow conduit and into the boundary layer, andat least one bypass flow assembly positioned within the cavity, each bypass flow assemble comprising:a bypass inlet opening extending through the sidewall to channel ambient air into the rotor blade cavity;a bypass outlet opening extending through the blade sidewall to discharge air from the rotor blade cavity into the boundary layer;an inlet hatch coupled to the sidewall and positioned with respect to the bypass inlet opening, the inlet hatch movable to cover said bypass inlet opening in a first position and to allow air to be channeled into the rotor blade cavity in a second position; andan outlet hatch coupled to the blade sidewall and positioned with respect to the bypass outlet opening, the outlet hatch movable to cover the bypass outlet opening in a first position and to allow air to be discharged from the rotor blade cavity in a second position. 2. An air distribution system in accordance with claim 1, wherein the blade sidewall includes a first blade section and an opposite second blade section coupled to the first blade section to form the rotor blade, said outlet aperture defined through the first blade section proximate the trailing edge, said inlet aperture defined through the second blade section proximate the leading edge. 3. An air distribution system in accordance with claim 1, wherein said bypass flow assembly further comprises: a plurality of actuators, each actuator operatively coupled to a respective inlet hatch to position said inlet hatch at said first position, at said second position, and at any position therebetween; anda control system operatively coupled to said inlet hatch to facilitate moving said inlet hatch at said first position, at said second position, and at any position therebetween. 4. An air distribution system in accordance with claim 1, wherein the wind turbine rotor blade has a thickness defined perpendicularly from the chordwise axis, said outlet aperture positioned between the trailing edge and a location of maximum thickness of the wind turbine rotor blade with respect to the chordwise axis. 5. An air distribution system in accordance with claim 4, wherein said inlet aperture is positioned between the leading edge and the location of maximum thickness with respect to the chordwise axis. 6. An air distribution system in accordance with claim 1, wherein the rotor blade extends between a root portion and a tip portion, said air distribution system further comprises: at least one intake aperture defined through the sidewall;at least one discharge aperture defined through the sidewall and positioned adjacent the tip portion; anda discharge manifold coupled between said intake aperture and said discharge aperture for discharging air through the tip portion of the rotor blade. 7. A wind turbine, comprising: a tower;a nacelle coupled to said tower;a hub rotatably coupled to said nacelle;at least one rotor blade coupled to said hub, said rotor blade comprising at least one sidewall having an inner surface defining a cavity and an outer surface extending between a leading edge and an axially spaced trailing edge; andat least one bleed flow assembly positioned within said cavity for discharging air into a boundary layer of air across said outer surface to reduce a separation of the boundary layer from said outer surface, each bleed flow assembly comprising:a bleed flow conduit coupled to an inner surface of said sidewall and oriented with respect to a chordwise axis defined between said leading edge and said trailing edge, said bleed flow conduit configured to channel air through said rotor blade;an inlet aperture extending through said sidewall proximate the leading edge to channel air into said bleed flow conduit; andan outlet aperture extending through said sidewall proximate the trailing edge to discharge air from said bleed flow conduit and into the boundary layer; andat least one bypass flow assembly positioned within the cavity, each bypass flow assembly comprising: a bypass inlet opening extending through the sidewall to channel ambient air into the rotor blade cavity;a bypass outlet opening extending through the blade sidewall to discharge air from the rotor blade cavity into the boundary layer;an inlet hatch coupled to the sidewall and positioned with respect to the bypass inlet opening, the inlet hatch movable to cover said bypass inlet opening in a first position and to allow air to be channeled into the rotor blade cavity in a second position; andan outlet hatch coupled to the blade sidewall and positioned with respect to the bypass outlet opening, the outlet hatch movable to cover the bypass outlet opening in a first position and to allow air to be discharged from the rotor blade cavity in a second position. 8. A wind turbine in accordance with claim 7, wherein said sidewall includes a first blade section and an opposite second blade section coupled to said first blade section to form said rotor blade, said outlet aperture defined through said first blade section proximate said trailing edge, said inlet aperture defined through said second blade section proximate said leading edge. 9. A wind turbine in accordance with claim 7, wherein said bypass flow assembly further comprises: a plurality of actuators, each actuator operatively coupled to a respective inlet hatch to position said inlet hatch at said first position, at said second position, and at any position therebetween; anda control system operatively coupled to said inlet hatch to facilitate moving said inlet hatch at said first position, at said second position, and at any position therebetween. 10. A wind turbine in accordance with claim 7, wherein said rotor blade has a thickness defined perpendicularly from the chordwise axis, said outlet aperture positioned between said trailing edge and a location of maximum thickness of said rotor blade with respect to the chordwise axis. 11. A wind turbine in accordance with claim 10, wherein said inlet aperture is positioned between said leading edge and the location of maximum thickness with respect to the chordwise axis. 12. A wind turbine in accordance with claim 7, wherein said rotor blade extends between a root portion and a tip portion, said air distribution system further comprises: at least one intake aperture defined through said sidewall;at least one discharge aperture defined through said sidewall and positioned adjacent said tip portion; anda discharge manifold coupled between said intake aperture and said discharge aperture for discharging air through said tip portion of said rotor blade. 13. A method of manipulating a boundary layer across a wind turbine rotor blade, the rotor blade having at least one sidewall defining a cavity therein, the sidewall extending between a leading edge and an axially spaced trailing edge and defining a chordwise axis between the leading edge and the trailing edge, said method comprising: coupling a bleed flow conduit to an inner surface of the sidewall and orienting the bleed flow conduit with respect to the chordwise axis between the leading edge and the trailing edge;forming an inlet aperture through the sidewall and through the bleed flow conduit to provide flow communication between ambient air and the bleed flow conduit;forming an outlet aperture through the sidewall and through the bleed flow conduit to provide flow communication between the bleed flow conduit and the boundary layer;channeling air from the inlet aperture to the outlet aperture through the bleed flow conduit, and discharging the air from the bleed flow conduit into the boundary layer to prevent a separation of the boundary layer from the rotor blade;coupling a bypass flow assembly to the rotor blade;transmitting, from a sensor to a control system, a signal indicative of a wind velocity; andoperating the bypass flow assembly to channel air from the rotor blade cavity and into the boundary layer based on the sensed wind velocity. 14. A method in accordance with claim 13, wherein the blade sidewall includes a first blade section and an opposite second blade section coupled to the first blade section to form the rotor blade, said method further comprising: forming the outlet aperture through the first blade section proximate the trailing edge; andforming the inlet aperture through the second blade section proximate the leading edge. 15. A method in accordance with claim 13, wherein coupling a bypass flow assembly to the rotor blade comprises: forming a plurality of bypass inlet openings through the second blade section to channel ambient air into the rotor blade cavity;forming a plurality of bypass outlet openings through the first blade section to discharge air from said rotor blade cavity into the boundary layer; andcoupling a plurality of outlet hatches to the first blade section adjacent a respective bypass outlet opening, each outlet hatch movable to cover the respective bypass outlet opening in a first position and to allow air to be discharged from said rotor blade cavity in a second position.
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