Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads

Rachael E. Smith; Ajit C. Pillai; Gavin Tabor; Philipp R. Thies; Lars Johanning

doi:10.1115/OMAE2019-95759

Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads

Rachael E. Smith^*
, Ajit C. Pillai
, Gavin Tabor
, Philipp R. Thies
, Lars Johanning

^*Corresponding author for this work

School of Engineering, Computing and Mathematics

University of Exeter

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

Abstract

The rotor of a horizontal-axis floating offshore wind turbine is more frequently misaligned with the oncoming wind than that of a fixed offshore or onshore wind turbine due to the pitch and yaw motions of the floating support structure. This can lead to increased unsteady loading and fatigue on the components beyond those considered in the standard load cases. In this work, the Simulator fOr Wind Farm Applications (SOWFA) tool within the CFD toolbox OpenFOAM is used to perform simulations of a wind turbine at different stationary angles to the oncoming wind flow that a floating wind turbine may experience, so that the impact of misaligned flow on power production and blade loading can be studied. The turbine is modelled using an actuator line method which is coupled with NREL’s aeroelastic code FAST to compute the structural response. The results of this study will be used in future work to optimise the rotor geometry of a floating offshore wind turbine.

Original language	English
Title of host publication	Ocean Renewable Energy
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791858899
DOIs	https://doi.org/10.1115/OMAE2019-95759
Publication status	Published - 2019
Event	ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom Duration: 9 Jun 2019 → 14 Jun 2019

Publication series

Name	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume	10

Conference

Conference	ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
Country/Territory	United Kingdom
City	Glasgow
Period	9/06/19 → 14/06/19

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

Ocean Engineering
Energy Engineering and Power Technology
Mechanical Engineering

Access to Document

10.1115/OMAE2019-95759

Cite this

Smith, R. E., Pillai, A. C., Tabor, G., Thies, P. R., & Johanning, L. (2019). Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads. In Ocean Renewable Energy (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 10). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2019-95759

@inproceedings{d0a9effd9c994c81956b9ca2d2c15e75,

title = "Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads",

abstract = "The rotor of a horizontal-axis floating offshore wind turbine is more frequently misaligned with the oncoming wind than that of a fixed offshore or onshore wind turbine due to the pitch and yaw motions of the floating support structure. This can lead to increased unsteady loading and fatigue on the components beyond those considered in the standard load cases. In this work, the Simulator fOr Wind Farm Applications (SOWFA) tool within the CFD toolbox OpenFOAM is used to perform simulations of a wind turbine at different stationary angles to the oncoming wind flow that a floating wind turbine may experience, so that the impact of misaligned flow on power production and blade loading can be studied. The turbine is modelled using an actuator line method which is coupled with NREL{\textquoteright}s aeroelastic code FAST to compute the structural response. The results of this study will be used in future work to optimise the rotor geometry of a floating offshore wind turbine.",

author = "Smith, \{Rachael E.\} and Pillai, \{Ajit C.\} and Gavin Tabor and Thies, \{Philipp R.\} and Lars Johanning",

note = "Publisher Copyright: Copyright {\textcopyright} 2019 ASME.; ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 ; Conference date: 09-06-2019 Through 14-06-2019",

year = "2019",

doi = "10.1115/OMAE2019-95759",

language = "English",

series = "Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE",

publisher = "American Society of Mechanical Engineers (ASME)",

booktitle = "Ocean Renewable Energy",

address = "United States",

}

Smith, RE, Pillai, AC, Tabor, G, Thies, PR & Johanning, L 2019, Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads. in Ocean Renewable Energy. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 10, American Society of Mechanical Engineers (ASME), ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019, Glasgow, United Kingdom, 9/06/19. https://doi.org/10.1115/OMAE2019-95759

Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads. / Smith, Rachael E.; Pillai, Ajit C.; Tabor, Gavin et al.
Ocean Renewable Energy. American Society of Mechanical Engineers (ASME), 2019. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 10).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

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AU - Johanning, Lars

PY - 2019

Y1 - 2019

N2 - The rotor of a horizontal-axis floating offshore wind turbine is more frequently misaligned with the oncoming wind than that of a fixed offshore or onshore wind turbine due to the pitch and yaw motions of the floating support structure. This can lead to increased unsteady loading and fatigue on the components beyond those considered in the standard load cases. In this work, the Simulator fOr Wind Farm Applications (SOWFA) tool within the CFD toolbox OpenFOAM is used to perform simulations of a wind turbine at different stationary angles to the oncoming wind flow that a floating wind turbine may experience, so that the impact of misaligned flow on power production and blade loading can be studied. The turbine is modelled using an actuator line method which is coupled with NREL’s aeroelastic code FAST to compute the structural response. The results of this study will be used in future work to optimise the rotor geometry of a floating offshore wind turbine.

AB - The rotor of a horizontal-axis floating offshore wind turbine is more frequently misaligned with the oncoming wind than that of a fixed offshore or onshore wind turbine due to the pitch and yaw motions of the floating support structure. This can lead to increased unsteady loading and fatigue on the components beyond those considered in the standard load cases. In this work, the Simulator fOr Wind Farm Applications (SOWFA) tool within the CFD toolbox OpenFOAM is used to perform simulations of a wind turbine at different stationary angles to the oncoming wind flow that a floating wind turbine may experience, so that the impact of misaligned flow on power production and blade loading can be studied. The turbine is modelled using an actuator line method which is coupled with NREL’s aeroelastic code FAST to compute the structural response. The results of this study will be used in future work to optimise the rotor geometry of a floating offshore wind turbine.

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Impact of rotor misalignment due to platform motions on floating offshore wind turbine blade loads

Abstract

Publication series

Conference

UN SDGs

ASJC Scopus subject areas

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