As wind turbines continue to grow larger, problems associated with adverse aerodynamic loads will grow more critical. Thus, the wind energy technical community has begun to seriously consider the potential of aerodynamic control methodologies for mitigating adverse aerodynamic loading. Spatial and temporal attributes of the structures and processes present in these flow fields hold important implications for active aerodynamic control methodologies currently being contemplated for wind turbine applications. The current work uses complementary experimental and computational methodologies, to isolate and characterize key attributes of blade flow fields associated with axisymmetric and yawed turbine operation. During axisymmetric operation, a highly three-dimensional, shear layer dominated flow field yields rotational augmentation of both mean and standard deviation levels of aerodynamic forces. Under yawed operating conditions, pseudo-sinusoidal inflow angle oscillations elicit dynamic stall, which significantly intensifies aerodynamic load production. Both rotationally augmented and dynamically stalled flows possess attributes likely to pose central challenges for turbine flow control. Whether active control of turbine aerodynamics can help alleviate adverse aerodynamic loads will depend on comprehension and command of the issues documented herein.
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ASME/JSME 2007 5th Joint Fluids Engineering Conference
July 30–August 2, 2007
San Diego, California, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4289-4
PROCEEDINGS PAPER
Wind Turbine Blade Flow Fields and Prospects for Active Aerodynamic Control Available to Purchase
S. Schreck,
S. Schreck
National Renewable Energy Laboratory, Golden, CO
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M. Robinson
M. Robinson
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
S. Schreck
National Renewable Energy Laboratory, Golden, CO
M. Robinson
National Renewable Energy Laboratory, Golden, CO
Paper No:
FEDSM2007-37651, pp. 1129-1140; 12 pages
Published Online:
March 30, 2009
Citation
Schreck, S, & Robinson, M. "Wind Turbine Blade Flow Fields and Prospects for Active Aerodynamic Control." Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 2: Fora, Parts A and B. San Diego, California, USA. July 30–August 2, 2007. pp. 1129-1140. ASME. https://doi.org/10.1115/FEDSM2007-37651
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