A semi-coupled aero-servo-hydro numerical model for floating vertical axis wind turbines operating on TLPs

Gao, Ju; Griffith, D. Todd; Sakib, Mohammad Sadman; Boo, Sung Youn

doi:10.1016/j.renene.2021.09.076

A semi-coupled aero-servo-hydro numerical model for floating vertical axis wind turbines operating on TLPs

Journal Article · Tue Sep 21 00:00:00 EDT 2021 · Renewable Energy

DOI:https://doi.org/10.1016/j.renene.2021.09.076· OSTI ID:1977602

Gao, Ju ^[1]; ^[2]; Sakib, Mohammad Sadman ^[2]; Boo, Sung Youn ^[3]

Univ. of Texas at Dallas, Richardson, TX (United States); OSTI
Univ. of Texas at Dallas, Richardson, TX (United States)
VL Offshore, Houston, TX (United States)

Floating vertical axis wind turbines (VAWTs) have many advantages over floating horizontal axis wind turbines (HAWTs) at large scales in deep water; however, there are several key challenges to overcome as well. One of the challenges is accurate prediction of the dynamic motion and loads performance of a floating VAWT. Here, a new semi-coupled aero-servo-hydro method is developed to assess dynamic responses of a floating VAWT by modeling the system as a 7-degree-of-freedom (7-DOF) model: the supporting platform is considered as a 6-DOF rigid body; the rotation of the rotor is considered as the 7th DOF. Aerodynamic, hydrodynamic, and mooring loads and control of the rotor speed are fully considered. This model can predict performance of floating VAWTs with reasonable fidelity according to validation with OrcaFlex through static and dynamic responses of a floating VAWT with Darrieus rotor operating on a new tension-leg platform (TLP). Being a reduced complexity model, the 7-DOF model can be efficiently applied to assess performance of the newly designed floating VAWT. This model is used to examine the relative contributions of aerodynamic and wave loads imparted to the floating system and the benefits of a three-bladed VAWT over a two-bladed VAWT through dynamic and fatigue analysis.

Research Organization:: Univ. of Texas at Dallas, Richardson, TX (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0001179

OSTI ID:: 1977602

Alternate ID(s):: OSTI ID: 1822572

Journal Information:: Renewable Energy, Journal Name: Renewable Energy Vol. 181; ISSN 0960-1481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (12)

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Related Subjects

17 WIND ENERGY
7-DOF model
floating vertical axis wind turbine
hydrodynamics
structural dynamics
tension leg platform

A semi-coupled aero-servo-hydro numerical model for floating vertical axis wind turbines operating on TLPs

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