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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2019-29
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-29
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 26 Jun 2019

Submitted as: research article | 26 Jun 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Wind Energy Science (WES).

Aeroelastic response of a multi-megawatt upwind HAWT based on fluid-structure interaction simulation

Yasir Shkara, Martin Cardaun, Ralf Schelenz, and Georg Jacobs Yasir Shkara et al.
  • Center for Wind Power Drives, RWTH Aachen University, Aachen,52074, Germany

Abstract. With the increase demand for greener, sustainable and economical energy sources, wind energy has proven a potential promising sustainable source of energy. The trend development of wind turbines tends to increase rotor diameter and tower height to capture more energy. The bigger, lighter and more flexible structure is more sensitive to smaller excitations. To make sure that the dynamic behavior of the wind turbine structure will not influence the stability of the system and to further optimize the structure, a fully detailed analyses of the entire wind turbine structure is crucial.

Since the fatigue and the excitation of the structure are highly depend on the aerodynamic forces, it is important to take blade-tower interaction into consideration in the design of large-scale wind turbines. In this work, an aeroelastic model that describes the interaction between the blade and the tower of a horizontal axis wind turbine (HAWT) is presented. The high-fidelity fluid-structure interaction (FSI) model is developed by coupling a computational fluid dynamics (CFD) solver with finite element (FE) solver to investigate the response of a multi-megawatt wind turbine structure. The results of the computational simulation showed that the dynamic response of the tower is highly depend on the rotor azimuthal position. Furthermore, rotation of the blades in front of the tower cause not only aerodynamic force pulls on the blade but a sudden reduction of the rotor aerodynamic torque by 2.3 % three times per revolution.

Yasir Shkara et al.
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Yasir Shkara et al.
Yasir Shkara et al.
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Latest update: 22 Sep 2019
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Short summary
A Computational fluid Dynamics (CFD) solver is coupled with structure solver to predict the dynamic response of a horizontal axis wind turbine structure. CFD provides much accurate and more realistic aerodynamic load that cannot be achieved by traditional method such as blade element momentum theory. As a result, the aeroelastic response of the wind turbine structure taking into account blade-tower interaction is described in more details.
A Computational fluid Dynamics (CFD) solver is coupled with structure solver to predict the...
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