A Combined Potential Flow-BEM Model to Study The Tower Shadow Effect in Wind Turbines

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This paper aims to improve the understanding of the wind turbine tower shadow effect by developing a model that combines potential flow and blade-element momentum theory. The change in the flow field due to the presence of the tower is discussed in detail, together with the resulting variations in the aerodynamic forces acting on the rotating blades, as well as the effect on the output power and the blade root bending moment. The tower shadow effect is not only due to the change in wind speed but also to the change in angle of attack. A one-dimensional description of the flow field is therefore bound to be inadequate. The impact of the tower diameter and blade-tower clearance on the rotor power and blade root bending moment can be expressed as a quadratic function of a non-dimensional parameter. Apart from a mild Reynolds-number effect, the results presented are independent of turbine size.
Originele taal-2English
Aantal pagina's10
TijdschriftJournal of Wind Engineering & Industrial Aerodynamics
StatusPublished - 30 aug 2022

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© 2022 Elsevier Ltd

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