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Aeroelastic Analysis of a Coplanar Twin-Rotor Wind Turbine

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  • Amr Ismaiel

    (Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
    Faculty of Engineering and Technology, Future University in Egypt (FUE), 5th Settlement, New Cairo 11835, Egypt)

  • Shigeo Yoshida

    (Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan)

Abstract

Multi-rotor system (MRS) wind turbines can be a competitive alternative to large-scale wind turbines. In order to address the structural behavior of the turbine tower, an in-house aeroelastic tool has been developed to study the dynamic responses of a 2xNREL 5MW twin-rotor configuration wind turbine. The developed tool has been verified by comparing the results of a single-rotor configuration to a FAST analysis for the same simulation conditions. Steady flow and turbulent load cases were investigated for the twin-rotor configuration. Results of the simulations have shown that elasticity of the tower should be considered for studying tower dynamic responses. The tower loads, and deformations are not straightforward with the number of rotors added. For an equivalent tower, an additional rotor will increase the tower-top deflection, and the tower-base bending moment both in the fore-aft direction will be more than doubled. The tower torsional stiffness becomes a crucial factor in the case of a twin-rotor tower to avoid a severe torsional deflection. Tower natural frequencies are dominant over the flow conditions in regards to the loads and deflections.

Suggested Citation

  • Amr Ismaiel & Shigeo Yoshida, 2019. "Aeroelastic Analysis of a Coplanar Twin-Rotor Wind Turbine," Energies, MDPI, vol. 12(10), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1881-:d:231953
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    References listed on IDEAS

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    1. Göltenbott, Uli & Ohya, Yuji & Yoshida, Shigeo & Jamieson, Peter, 2017. "Aerodynamic interaction of diffuser augmented wind turbines in multi-rotor systems," Renewable Energy, Elsevier, vol. 112(C), pages 25-34.
    2. Shigeo Yoshida & Uli Goltenbott & Yuji Ohya & Peter Jamieson, 2016. "Coherence Effects on the Power and Tower Loads of a 7 × 2 MW Multi-Rotor Wind Turbine System," Energies, MDPI, vol. 9(9), pages 1-16, September.
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    Cited by:

    1. Yuan Zhang & Xin Cai & Shifa Lin & Yazhou Wang & Xingwen Guo, 2022. "CFD Simulation of Co-Planar Multi-Rotor Wind Turbine Aerodynamic Performance Based on ALM Method," Energies, MDPI, vol. 15(17), pages 1-13, September.
    2. Ralf Stetter, 2020. "Approaches for Modelling the Physical Behavior of Technical Systems on the Example of Wind Turbines," Energies, MDPI, vol. 13(8), pages 1-27, April.
    3. Yewen Chen & Shuni Zhou & Chang Cai & Weilong Wang & Yuheng Hao & Teng Zhou & Xinbao Wang & Qingan Li, 2023. "Study on the Rotation Effect on the Modal Performance of Wind Turbine Blades," Energies, MDPI, vol. 16(3), pages 1-11, January.

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