To further reduce the cost of wind energy, future turbine designs will continue to migrate toward lighter and more flexible structures. Thus, the accuracy and reliability of aerodynamic load prediction has become a primary consideration in turbine design codes. Dynamically stalled flows routinely generated during yawed operation are powerful and potentially destructive, as well as complex and difficult to model. As a prerequisite to aerodynamics model improvements, wind turbine dynamic stall must be characterized in detail and thoroughly understood. The current study analyzed turbine blade surface pressure data and local inflow data acquired by the NREL Unsteady Aerodynamics Experiment during the NASA Ames wind tunnel experiment. Analyses identified and characterized two key dynamic stall processes, vortex initiation and vortex convection, across a broad parameter range. Results showed that both initiation and convection exhibited pronounced three-dimensional kinematics, which responded in systematic fashion to variations in wind speed, turbine yaw angle, and radial location.
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November 2005
Research Papers
Blade Three-Dimensional Dynamic Stall Response to Wind Turbine Operating Condition
S. Schreck,
S. Schreck
Applied Research Division,
NREL’s National Wind Technology Center
, Golden, CO 80401
Search for other works by this author on:
M. Robinson
M. Robinson
Applied Research Division,
NREL’s National Wind Technology Center
, Golden, CO 80401
Search for other works by this author on:
S. Schreck
Applied Research Division,
NREL’s National Wind Technology Center
, Golden, CO 80401
M. Robinson
Applied Research Division,
NREL’s National Wind Technology Center
, Golden, CO 80401J. Sol. Energy Eng. Nov 2005, 127(4): 488-495 (8 pages)
Published Online: June 30, 2005
Article history
Received:
January 25, 2005
Revised:
June 28, 2005
Accepted:
June 30, 2005
Citation
Schreck, S., and Robinson, M. (June 30, 2005). "Blade Three-Dimensional Dynamic Stall Response to Wind Turbine Operating Condition." ASME. J. Sol. Energy Eng. November 2005; 127(4): 488–495. https://doi.org/10.1115/1.2035706
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