Rotational Augmentation on a 2.3 MW Rotor Blade with Thick Flatback Airfoil Cross-Sections: Preprint

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Rotational augmentation was analyzed for a 2.3 MW wind turbine, which was equipped with thick flatback airfoils at inboard radial locations and extensively instrumented for acquisition of time varying surface pressures. Mean aerodynamic force and surface pressure data were extracted from an extensive field test database, subject to stringent criteria for wind inflow and turbine operating conditions. Analyses of these data showed pronounced amplification of aerodynamic forces and significant enhancements to surface pressures in response to rotational influences, relative to two-dimensional, stationary conditions. Rotational augmentation occurrence and intensity in the current effort was found to be consistent with that observed ... continued below

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11 p.

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Schreck, S.; Fingersh, L.; Siegel, K.; Singh, M. & Medina, P. January 1, 2013.

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Rotational augmentation was analyzed for a 2.3 MW wind turbine, which was equipped with thick flatback airfoils at inboard radial locations and extensively instrumented for acquisition of time varying surface pressures. Mean aerodynamic force and surface pressure data were extracted from an extensive field test database, subject to stringent criteria for wind inflow and turbine operating conditions. Analyses of these data showed pronounced amplification of aerodynamic forces and significant enhancements to surface pressures in response to rotational influences, relative to two-dimensional, stationary conditions. Rotational augmentation occurrence and intensity in the current effort was found to be consistent with that observed in previous research. Notably, elevated airfoil thickness and flatback design did not impede rotational augmentation.

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11 p.

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  • To be presented at the 51st AIAA Aerospace Sciences Meeting, 7-10 January 2013, Grapevine, Texas

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  • Report No.: NREL/CP-5000-57372
  • Grant Number: AC36-08GO28308
  • Office of Scientific & Technical Information Report Number: 1063015
  • Archival Resource Key: ark:/67531/metadc838733

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  • January 1, 2013

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  • May 19, 2016, 9:45 a.m.

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  • April 3, 2017, 7:57 p.m.

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Schreck, S.; Fingersh, L.; Siegel, K.; Singh, M. & Medina, P. Rotational Augmentation on a 2.3 MW Rotor Blade with Thick Flatback Airfoil Cross-Sections: Preprint, article, January 1, 2013; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc838733/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.