Experimental investigation of aerodynamic devices for wind turbine rotational speed control: Phase II

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Description

An experimental investigation was undertaken to further evaluate and enhance the performance of an aerodynamic device for wind turbine overspeed protection and power modulation applications. The trailing-edge device, known as the Spoiler-Flap, was examined in detail during wind tunnel tests. The impact of hp length, vent angle, pivot point and chord variations on aerodynamic and hinge moment characteristics were evaluated and a best overall configuration was identified. Based on this effort, a 40% chord device with a 1% hp length and 40 degree vent angle offers improved performance potential for wind turbine applications. This specific configuration appears to offer good ... continued below

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72 p.

Creation Information

Miller, S.L. February 1, 1996.

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  • Miller, S.L. Wichita State Univ., Wichita, KS (United States)

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Description

An experimental investigation was undertaken to further evaluate and enhance the performance of an aerodynamic device for wind turbine overspeed protection and power modulation applications. The trailing-edge device, known as the Spoiler-Flap, was examined in detail during wind tunnel tests. The impact of hp length, vent angle, pivot point and chord variations on aerodynamic and hinge moment characteristics were evaluated and a best overall configuration was identified. Based on this effort, a 40% chord device with a 1% hp length and 40 degree vent angle offers improved performance potential for wind turbine applications. This specific configuration appears to offer good suction coefficient performance for both turbine power modulation and overspeed (i.e., aerodynamic braking) applications. Device hinge moment loads improved (compared to other devices investigated) in magnitude and the impact of surface roughness was found to be minimal.

Physical Description

72 p.

Notes

OSTI as DE96000540

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  • Other Information: PBD: Feb 1996

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  • Other: DE96000540
  • Report No.: NREL/TP--441-20507
  • Grant Number: AC36-83CH10093
  • DOI: 10.2172/224290 | External Link
  • Office of Scientific & Technical Information Report Number: 224290
  • Archival Resource Key: ark:/67531/metadc667393

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • February 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • March 28, 2016, 1:56 p.m.

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Miller, S.L. Experimental investigation of aerodynamic devices for wind turbine rotational speed control: Phase II, report, February 1, 1996; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc667393/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.