2022
DOI: 10.1088/1742-6596/2265/3/032006
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Comparison of dynamic stall on an airfoil undergoing sinusoidal and VAWT-shaped pitch motions

Abstract: The aerodynamics of vertical axis wind turbines (VAWTs) are inherently unsteady because the blades experience large angle of attack variations throughout a full turbine revolution. At low tip speed ratios, this can lead to a phenomenon known as dynamic stall. To better characterise the unsteady aerodynamics and represent them in models and simulations, data from studies of individual static or pitching airfoils are often applied to VAWT blades. However, these studies often involve sinusoidally pitching airfoil… Show more

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“…Note that the lift coefficient in quasi-static condition is also reported for comparison. It is worth noting that according to the findings in Brunner et al [20], the lift generated from a wing in a sinusoidal pitching movement closely matches that produced by a VAWTshaped pitching motion. This observation suggests that sinusoidal motions provide better approximations of the lift generated by VAWT-shaped pitching motions compared to static aerofoil data.…”
Section: Experimental Aerofoil Polarsmentioning
confidence: 52%
“…Note that the lift coefficient in quasi-static condition is also reported for comparison. It is worth noting that according to the findings in Brunner et al [20], the lift generated from a wing in a sinusoidal pitching movement closely matches that produced by a VAWTshaped pitching motion. This observation suggests that sinusoidal motions provide better approximations of the lift generated by VAWT-shaped pitching motions compared to static aerofoil data.…”
Section: Experimental Aerofoil Polarsmentioning
confidence: 52%