Vortex generators aligned with trailing edge features on wind turbine blade
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F03B-003/12
F03D-001/06
출원번호
US-0251943
(2014-04-14)
등록번호
US-9476406
(2016-10-25)
발명자
/ 주소
Obrecht, John M.
Steingrimsson, Arni T.
출원인 / 주소
SIEMENS AKTIENGESELLSCHAFT
인용정보
피인용 횟수 :
1인용 특허 :
13
초록▼
A wind turbine blade (80, 82) having a spanwise series of vortex generators (26, 28, 26P, 28P, 64, 66) and having a trailing edge (42) defining a waveform. The vortex generators are aligned with a predetermined position or phase (44, 46) of a respective period of the trailing edge waveform. Each vor
A wind turbine blade (80, 82) having a spanwise series of vortex generators (26, 28, 26P, 28P, 64, 66) and having a trailing edge (42) defining a waveform. The vortex generators are aligned with a predetermined position or phase (44, 46) of a respective period of the trailing edge waveform. Each vortex generator may be designed to create a vortex (27, 29) that crosses the trailing edge at an angle of less than 30 degrees from parallel to the trailing edge. The blade may include alternating ridges (52) and troughs (54) that end at the waveform trailing edge. A front end of each trough may form a V-shaped drop-off in the suction side of the blade that forms a pair (64, 66) of vortex generators to create counter-rotating vortices within the trough that entrain energy to the bottom of the trough.
대표청구항▼
1. A wind turbine blade comprising a predetermined alignment of vortex generating features with trailing edge features relative to an airflow path,the trailing edge features comprise a trailing edge and a series of chordwise suction side troughs displaying a waveform profile as viewed from behind th
1. A wind turbine blade comprising a predetermined alignment of vortex generating features with trailing edge features relative to an airflow path,the trailing edge features comprise a trailing edge and a series of chordwise suction side troughs displaying a waveform profile as viewed from behind the trailing edge,the vortex generating features comprise, on a suction side of the blade and upstream from the trailing edge, a spanwise sequence of pairs of first and second vortex generators designed to produce respective first and second respectively counter-rotating vortices that crosses the trailing edge,wherein each of the first vortex generators is aligned chordwise with a common first phase of the waveform profile, andwherein each of the second vortex generators vortex is aligned chordwise with a common second phase of the waveform profile. 2. The wind turbine blade of claim 1, wherein: each of the first and second vortex generators is designed to produce a downstream vortical flow that crosses the trailing edge at an angle of less than 30 degrees from parallel with the trailing edge. 3. The wind turbine blade of claim 1, wherein: the vortex generating features comprise a spanwise sequence of alternately angled vortex generators on a suction side of the blade designed to produce a spanwise sequence of pairs of first and second respectively alternately counter-rotating vortices downstream thereof. 4. The wind turbine blade of claim 1, wherein each of the first and second the vortex generators are designed to create the vortices to extend in diameter to a height of the trough over at least 75% of a length of the trough. 5. The wind turbine blade of claim 1, wherein each of the suction side and pressure side vortex generators is designed to produce a respective downstream vortical flow that crosses the trailing edge at an angle of less than 30 degrees from parallel therewith. 6. The wind turbine blade of claim 1, wherein each of the vortex generators is designed to produce a downstream vortical flow that crosses the trailing edge at an angle of less than 20 degrees from parallel with the trailing edge. 7. The wind turbine blade of claim 1, wherein each first and second vortex generators is sunken into the suction side of the blade, with a top edge of the respective vortex generator being flush with the suction side of the blade, the respective vortex generator having no pressure side surface. 8. The wind turbine blade of claim 7, wherein the first and second vortex generators suction side is convex as seen in a plan view of the blade. 9. The wind turbine blade of claim 7, wherein the first and second vortex generators suction side tapers to a point at an adjacent ridge of the respective trough, the vortex generator having no trailing edge. 10. The wind turbine blade of claim 7, wherein the respective vortex generator having no leading edge. 11. The wind turbine blade of claim 7, wherein the trailing edge comprising a serrations as viewed from above. 12. A wind turbine blade comprising: a trailing edge with a waveform profile;a first spanwise series of vortex generators on a suction side of the blade, wherein each vortex generator of the first spanwise series is aligned chordwise with a common first phase of the waveform profile;a second spanwise series of vortex generators, wherein each vortex generator of the second spanwise series is aligned chordwise with a common second phase of the waveform profile, wherein the waveform profile of the trailing edge is formed by a series of chordwise suction side troughs and an opposed nested series of chordwise pressure side ridges; anda plurality of first and second pressure side vortex generators on a pressure side of the blade, each first pressure side vortex generator aligned chordwise with the common first phase of the waveform profile, each second pressure side vortex generator aligned chordwise with the common second phase of the waveform profile, and each pressure side vortex generator designed to create a vortical flow that crosses the trailing edge at an angle of less than 20 degrees. 13. A wind turbine blade comprising: a trailing edge with a waveform profile;a first spanwise series of vortex generators on a suction side of the blade, wherein each vortex generator of the first spanwise series is aligned chordwise with a common first phase of the waveform profile; anda second spanwise series of vortex generators, wherein each vortex generator of the second spanwise series is aligned chordwise with a common second phase of the waveform profile, wherein the waveform profile of the trailing edge is formed by a series of chordwise suction side troughs and an opposed nested series of chordwise pressure side ridges,wherein each trough comprises a front end comprising a V-shaped drop-off from the suction side of the blade, sides of the V-shaped drop-offs forming respective pairs of vortex generators generating respective pairs of counter-rotating vortical flows within the respective troughs.
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이 특허에 인용된 특허 (13)
Presz ; Jr. Walter M. (Wilbraham MA) Paterson Robert W. (Simsbury CT) Werle Michael J. (Hartford CT), Airfoil-shaped body.
Vijgen Paul M. H. W. (Hampton VA) Howard Floyd G. (Hampton VA) Bushnell Dennis M. (Wicomico VA) Holmes Bruce J. (Newport News VA), Serrated trailing edges for improving lift and drag characteristics of lifting surfaces.
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