A WIND TURBINE BLADE HAVING AN ANGLED STALL FENCE

A wind turbine blade is described having a curved stall fence. The stall fence has a curved cross-section along at least a section of the length of the stall fence. The curved section acts to re-route airflow, particularly cross-flow along the longitudinal direction of the blade, to redirect it back...

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Bibliographische Detailangaben
Hauptverfasser:	RAMACHANDRAN, DHINAGARAN, ANWAR, MOHAMMED MEHRAJ, MADSEN, JESPER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THANNON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS,TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTIONPRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A wind turbine blade is described having a curved stall fence. The stall fence has a curved cross-section along at least a section of the length of the stall fence. The curved section acts to re-route airflow, particularly cross-flow along the longitudinal direction of the blade, to redirect it back in the direction of flow. This construction provides for an improvement over traditionally straight stall fences. Additionally, the stall fences may be shaped to provide an acceleration of airflow past the stall fence in the mean flow direction, by restricting airflow and inducing a Venturi effect at the stall fence. L'invention porte sur une pale de turbine éolienne ayant une cloison de décrochage coudée. La cloison de décrochage a une section transversale incurvée le long d'au moins une partie de la longueur de la cloison de décrochage. La section incurvée a pour effet de rediriger un flux d'air, en particulier un flux transversal, le long de la direction longitudinale de la pale, pour le ramener dans la direction du flux. Cette construction apporte une amélioration aux cloisons de décrochage qui sont traditionnellement rectilignes. De plus, les cloisons de décrochage peuvent être conformées de façon à entraîner une accélération du flux d'air sur la cloison de décrochage dans la direction principale de flux, en limitant le débit d'air et en induisant un effet de Venturi au niveau de la cloison de décrochage.