Wind turbine blade with integrated stall sensor and...

Details Wind turbine blade with integrated stall sensor and... Wind turbine blade with integrated stall sensor and...

2011-03-01

2011-03-01

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

With measuring, testing, signalling or inspection means

C416S001000, C416S023000, C416S228000

Reexamination Certificate

active

07896614

ABSTRACT:
A wind turbine includes an electrical stall sensor configured on a pressure surface of at least one turbine blade at a location to detect backflow in a stall condition. The stall sensor includes a flap pivotally configured on the respective pressure surface so as to be moved from a first position towards a second position by backflow over the pressure surface during a stall condition. A sensor circuit responds to movement of the flap between the first and second positions and generates a corresponding electrical signal that indicates the stall condition.

REFERENCES:
patent: 2373089 (1945-04-01), Allen et al.
patent: 2431241 (1947-11-01), Godsey, Jr.
patent: 2486779 (1949-11-01), Fairbanks
patent: 2603695 (1952-07-01), Campbell
patent: 4427897 (1984-01-01), Migliori
patent: 6065334 (2000-05-01), Corten
patent: 6941816 (2005-09-01), Kurtz et al.
patent: 7172392 (2007-02-01), Wastling et al.

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