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Published July 19, 2016 | public
Book Section - Chapter

Leading Edge Vortex Development on Pitching and Surging Airfoils: A Study of Vertical Axis Wind Turbines


Vertical axis wind turbine blades undergo dynamic stall due to the large angle of attack variation they experience during a turbine rotation. Particle image velocimetry on a pitching and surging airfoil was used to perform time resolved measurements at blade Reynolds numbers near turbine operating conditions of 10^5. These experiments were compared to simulations performed in the rotating turbine frame as well as the linear, experimental, frame at a Reynolds number of 10^3 to investigate rotational and Reynolds number effects. The flow was shown to develop similarly prior to separation, but the kinematics of vortices shed post separation were reference frame dependent.

Additional Information

© 2016 Springer International Publishing Switzerland. First Online: 19 July 2016. This work was supported by the Gordon and Betty Moore Foundation through grant GBMF#2645 to the California Institute of Technology.

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January 13, 2024