期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 229, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jweia.2022.105131
关键词
Wind turbines; Tower shadow effect; Blade element momentum theory; Potential flow theory
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 study discusses in detail the changes in the flow field, aerodynamic forces, output power, and blade root bending moment due to the presence of the tower. The results show that the impact of tower diameter and blade-tower clearance on rotor power and blade root bending moment can be expressed as a quadratic function.
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.
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