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Energies 2015, 8(2), 1353-1372; doi:10.3390/en8021353

Simulating Dynamic Stall Effects for Vertical Axis Wind Turbines Applying a Double Multiple Streamtube Model

Division of Electricity, Department of Engineering Sciences, Uppsala University, Box 534, 751 21 Uppsala, Sweden
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Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 21 December 2014 / Accepted: 21 January 2015 / Published: 11 February 2015
(This article belongs to the Collection Wind Turbines)
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Abstract

The complex unsteady aerodynamics of vertical axis wind turbines (VAWT) poses significant challenges to the simulation tools. Dynamic stall is one of the phenomena associated with the unsteady conditions for VAWTs, and it is in the focus of the study. Two dynamic stall models are compared: the widely-used Gormont model and a Leishman–Beddoes-type model. The models are included in a double multiple streamtube model. The effects of flow curvature and flow expansion are also considered. The model results are assessed against the measured data on a Darrieus turbine with curved blades. To study the dynamic stall effects, the comparison of force coefficients between the simulations and experiments is done at low tip speed ratios. Simulations show that the Leishman–Beddoes model outperforms the Gormont model for all tested conditions. View Full-Text
Keywords: vertical axis turbine; dynamic stall; streamtube model vertical axis turbine; dynamic stall; streamtube model
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dyachuk, E.; Goude, A. Simulating Dynamic Stall Effects for Vertical Axis Wind Turbines Applying a Double Multiple Streamtube Model. Energies 2015, 8, 1353-1372.

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