An investigation of the effects of wind-induced inclination on floating wind turbine dynamics: heave plate excursion

Antonutti, Raffaello; Peyrard, Christophe; Johanning, Lars; Incecik, Atilla; Ingram, David

doi:10.1016/j.oceaneng.2014.09.008

Cited by 32 publications

(17 citation statements)

References 23 publications

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“…Similar agreements are found for the vertical force (Fig. 19), using reference values published in [41]. There are some deviations between the two results, even for these moderate wave amplitudes, at the peaks, as one might expect between linear and nonlinear models.…”

Section: Zero and Rst Order Loadssupporting

confidence: 85%

“…This geometry is a slight simplication of original the Dutch Tri-oater geometry [40], as we do not consider here the smaller supporting struts, but they should not constitute a signicant source of hydrodynamic forces with an inviscid model. A sketch of the geometry adopted in this work, also studied by Antonutti et al in [41], is represented on Fig. (17).…”

Section: Setup Of the Modelmentioning

confidence: 99%

“…1.0 Table 2: Geometric parameters of the Dutch Tri-oater chosen as in the study [41]. We study below the diraction of monochromatic waves on the oater.…”

Section: Setup Of the Modelmentioning

confidence: 99%

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A 3D parallel boundary element method on unstructured triangular grids for fully nonlinear wave-body interactions

et al. 2019

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This paper presents the development and validation of a three-dimensional numerical wave tank devoted to studying wave-structure interaction problems. It is based on the fully nonlinear potential ow theory, here solved by a boundary element approach and using unstructured triangular meshes of the domain's boundaries. Time updating is based on a second-order explicit Taylor series expansion. The method is parallelized using the Message Passing Interface (MPI) in order to take advantage of multi-processor systems. For radiation problems, with cylindrical bodies moving in prescribed motion, the free-surface is updated with a fully Lagrangian scheme, and is able to reproduce reference results for nonlinear forces exerted on the moving body. For diraction problems, semi-Lagrangian time-updating is used, and reproduces nonlinear eects for diraction on monopiles. Finally, we study the nonlinear wave loads on a xed semi-submersible structure, thereby illustrating the possibility to apply the proposed numerical model for the design of oshore structures and oaters.

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Section: Zero and Rst Order Loadssupporting

confidence: 85%

Section: Setup Of the Modelmentioning

confidence: 99%

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A 3D parallel boundary element method on unstructured triangular grids for fully nonlinear wave-body interactions

et al. 2019

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“…One of the major inovations used in the renewable energy sector are semi-submersible floating offshore wind turbines (FOWT). These structures often have column-stabilised platforms with submerged plates which provide extra heave added mass, wave damping far removed from wave excitation [2,13].…”

Section: Introductionmentioning

confidence: 99%

Radiation of water waves by a submerged nearly circular plate

Farina

Gama

Korotov

et al. 2017

Journal of Computational and Applied Mathematics

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A thin nearly circular plate is submerged below the free surface of deep water. The problem is reduced to a hypersingular integral equation over the surface of the plate which is conformally mapped onto the unit disc. The solution is computed by a spectral method proved to be efficient for the case of a circular disc. Numerical results are presented for the heave added mass and damping coefficients for two types of nearly circular plates.

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“…The platform pitch motion was found to be greatly influenced by the wind turbine at high wind speed. Antonutti et al [20,21] applied the CALHYPSO (CALcul HYdrodynamique Pour les Structures Offshore) program for time-domain simulations of a semi-submersible floating wind turbine to investigate the hydrodynamic behaviors under wind and wave loads. The influence of relative direction between the wind and the wave on the platform motion modes was discussed.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Interference Effects Between Wind Turbine and Spar-Type Floating Platform Under Combined Wind-Wave Excitation

Huang

Wan

2019

Sustainability

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In order to further understand the coupled aero-hydrodynamic performance of the floating offshore wind turbine (FOWT) in realistic ocean environment, it is necessary to investigate the interference effects between the unsteady aerodynamics of the wind turbine and different degree-of-freedom (DOF) platform motions under combined wind-wave excitation. In this paper, a validated CFD analysis tool FOWT-UALM-SJTU with modified actuator line model is applied for the coupled aero-hydrodynamic simulations of a spar-type FOWT system. The aero-hydrodynamic characteristics of the FOWT with various platform motion modes and different wind turbine states are compared and analyzed to explore the influence of the interference effects between the wind turbine and the floating platform on the performance of the FOWT. The dynamic responses of local relative wind speed and local attack angle at the blade section and wind-wave forces acting on the floating platform are discussed in detail to reveal the interaction mechanism between the aerodynamic loads and different DOF platform motions. It is shown that the surge motion and the pitch motion of the floating platform both significantly alter the local attack angle, while only the platform pitch motion have significant impacts on the local relative wind speed experienced by the rotating blades. Besides, the shaft tilt and the pro-cone angle of the wind turbine and the height-dependent wind speed all contribute to the variation of the local attack angle. The coupling between the platform motions along different DOFs is obviously amplified by the aerodynamic forces derived from the wind turbine. In addition, the wake deflection phenomenon is clearly observed in the near wake region when platform pitch motion is considered. The dynamic pitch motion of the floating platform also contributes to the severe wake velocity deficit and the increased wake width.

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An investigation of the effects of wind-induced inclination on floating wind turbine dynamics: heave plate excursion

Abstract: International audienc

Cited by 32 publications

References 23 publications

A 3D parallel boundary element method on unstructured triangular grids for fully nonlinear wave-body interactions

A 3D parallel boundary element method on unstructured triangular grids for fully nonlinear wave-body interactions

Radiation of water waves by a submerged nearly circular plate

Investigation of Interference Effects Between Wind Turbine and Spar-Type Floating Platform Under Combined Wind-Wave Excitation

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