Techniques for the determination of local dynamic pressure and angle of attack on a horizontal axis wind turbine

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Data from the National Renewable Energy Laboratory`s Combined Experiment has been utilized to develop techniques for indirectly calculating the instantaneous local dynamic pressure and angle of attack on a horizontal axis wind turbine. First, an analytic model based upon inflow geometry relative to the wind turbine was developed for both parameters. Second, dynamic pressure and angle of attack were inferred from the pressure required to normalize the blade stagnation point to C{sub p} = 1.0. Third, rotor blade pressure profiles were compared to those from wind tunnel tests to determine angle of attack. Test results are shown over a variety ... continued below

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57 p.

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Shipley, D.E.; Miller, M.S.; Robinson, M.C.; Luttges, M.W. & Simms, D.A. May 1, 1995.

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Description

Data from the National Renewable Energy Laboratory`s Combined Experiment has been utilized to develop techniques for indirectly calculating the instantaneous local dynamic pressure and angle of attack on a horizontal axis wind turbine. First, an analytic model based upon inflow geometry relative to the wind turbine was developed for both parameters. Second, dynamic pressure and angle of attack were inferred from the pressure required to normalize the blade stagnation point to C{sub p} = 1.0. Third, rotor blade pressure profiles were compared to those from wind tunnel tests to determine angle of attack. Test results are shown over a variety of typical inflow conditions and are corroborated by measured data. Differences between the calculated and measured values are also discussed.

Physical Description

57 p.

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OSTI as DE95009204

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  • Other Information: PBD: May 1995

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  • Other: DE95009204
  • Report No.: NREL/TP--442-7393
  • Grant Number: AC36-83CH10093
  • DOI: 10.2172/61151 | External Link
  • Office of Scientific & Technical Information Report Number: 61151
  • Archival Resource Key: ark:/67531/metadc695576

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1995

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • March 31, 2016, 8:53 p.m.

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Shipley, D.E.; Miller, M.S.; Robinson, M.C.; Luttges, M.W. & Simms, D.A. Techniques for the determination of local dynamic pressure and angle of attack on a horizontal axis wind turbine, report, May 1, 1995; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc695576/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.