The coupled dynamic response computation for a semi-submersible platform of floating offshore wind turbine

Tran, Thanh Toan; Kim, Dong-Hyun

doi:10.1016/j.jweia.2015.09.016

Cited by 90 publications

(58 citation statements)

References 12 publications

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“…To eliminate spurious wave reflections at the domain boundaries, a damping zone was set up to damp the waves traveling through the zone. The detailed procedure for coupling the catenary mooring solver, the 6‐DOF solver, and the VOF approach can be found in our previous works . The user‐field functions developed were also used to calculate the aerodynamic forces and moment exerted on the rotating blades of the FOWT.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, a similar grid generation topology of the computational domain was applied in this study. In addition, a fundamental hydrodynamic study of the OC4 DeepCwind platform was performed in the previous work . The dynamic response of the platform considering the free‐decay analysis and regular wave conditions was validated and verified against MARIN test data and several numerical codes, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The detailed procedure for coupling the catenary mooring solver, the 6-DOF solver, and the VOF approach can be found in our previous works. 28,45 The user-field functions developed were also used to calculate the aerodynamic forces and moment exerted on the rotating blades of the FOWT. Figure 4 shows the whole computational domain of the full-scale OC4 DeepCwind semisubmersible FOWT based on the overset grid topology.…”

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

“…On the other hand, an unsteady computational fluid dynamic (CFD) approach can directly include all of the physical effects related to the floating platform . Thus, this approach was carried out to thoroughly investigate the hydrodynamic characteristics of a floating platform . A fluid‐structure interaction (FSI) simulation with a quasi‐static crowfoot mooring line model was performed for the OC3 Hywind platform with wave‐wind coupling excitation .…”

Section: Introductionmentioning

confidence: 99%

“…22 Thus, this approach was carried out to thoroughly investigate the hydrodynamic characteristics of a floating platform. [24][25][26][27][28] A fluid-structure interaction (FSI) simulation with a quasi-static crowfoot mooring line model was performed for the OC3 Hywind platform with wave-wind coupling excitation. 25 The naoe-FOAM-SJTU solver including a mooring line solver has been developed to solve the aero-hydrodynamic coupling of a FOWT.…”

mentioning

confidence: 99%

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A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

Tran

Kim

2017

Wind Energy

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The prediction of dynamic characteristics for a floating offshore wind turbine (FOWT) is challenging because of the complex load coupling of aerodynamics, hydrodynamics, and structural dynamics. These loads should be accurately calculated to yield reliable analysis results in the design phase of a FOWT. In this study, a high-fidelity fluid-structure interaction simulation that simultaneously considers the influence of aero-hydrodynamic coupling due to the dynamic motion of a FOWT has been conducted using computational fluid dynamics based on an overset The dynamic influence of aero-hydro-structure interaction due to the coupled wind-wave loads on a floating offshore wind turbine (FOWT) is still not well understood. Various experimental floating substructures in both wave basin facilities and ocean coasts have been constructed or are in the planning stages throughout the world. 1-7 The current status of both of them is well described in the previous studies. [2][3][4] From the viewpoint of engineering, compared to a full-scale test on an ocean field, a wave basin test for a scaled-down model can reduce risk, cost, and uncertainties in the design. Dynamic characteristics of floating structure from a wave basin test can be approximately evaluated. However, its results are highly influenced by purpose of tests and quality of experiment equipment (eg, installed sensors and wind and wave generation quality). Moreover, previous experimental works did not adequately consider the same material, construction methods, or deployment method as the full-scale system. 7 In particular, a scaled-down model experiment in a wave basin inherently has limitations on the simultaneous satisfaction of both Froude and Reynolds scaling laws. [8][9][10][11] The scaled-down model is typically scaled by the dimensionless Froude number to ensure the similarity of platform hydrodynamic whereas the tip-speed ratio and wind speed to wave celerity ratio between scales is maintained to entirely consistent with Froude scaling. 8 However, an experiment on a FOWT is usually more expensive than a sophisticated design tool, which is preferred for cost-effective solutions during the design process. Therefore, sophisticated modeling tools must be developed to accurately simulate the complex multiphysical phenomena induced by aero-hydro-multibody dynamic coupling for a FOWT. 1 The dynamic characteristics of FOWTs have been properly analyzed by fully coupled aero-hydro-servo-elastic dynamic approaches. [12][13][14] However, the unsteady aerodynamic calculation in these approaches was performed using the well-known blade element momentum (BEM)

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Computational Fluid Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

Tran

Kim

2017

Wind Energy

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Effects of incident wind/wave directions on dynamic response of a SPAR-type floating offshore wind turbine system

Lyu

Zhang

2019

Acta Mech. Sin.

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As a promising renewable energy, offshore wind energy currently is gaining more attention, by which the economic and efficient operation of floating wind turbine systems is a potential research direction. This study is primarily devoted to the analysis of dynamic response of the NREL-5 MW reference wind turbine supported by an OC3-Hywind SPAR-type platform using a recompiled code which combines FAST with WAMIT. To verify the reliability of the recompiled code, the free decay motions of a floating wind turbine system in still water are examined with satisfactory results. After that, thirteen scenarios with different angles between wind and wave from 0°to 90°are investigated. The dynamic responses of the turbine system in various degrees of freedom (DOFs) for different incident wind/wave directions are presented in both time and frequency domains via the fast Fourier transform.

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Comparative Study of Numerical Methods for Predicting Wave-Induced Motions and Loads on a Semisubmersible

Gao,

Jiang,

Yang

et al. 2023

J. Marine. Sci. Appl.

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Numerical simulation tools based on potential-flow theory and/or Morison’s equation are widely used for predicting the hydrodynamic responses of floating offshore wind platforms. In general, these simplified approaches are used for the analysis under operational conditions, albeit with a carefully selected approach to account for viscous effects. Nevertheless, due to the limit hydrodynamic modelling to linear and weakly nonlinear models, these approaches severely underpredict the low-frequency nonlinear wave loads and dynamic responses of a semisubmersible. They may not capture important nonlinearities in severe sea states. For the prediction of wave-induced motions and loads on a semisubmersible, this work systematically compares a fully nonlinear viscous-flow solver and a hybrid model combining the potential-flow theory with Morison-drag loads in steep waves. Results show that when nonlinear phenomena are not dominant, the results obtained by the hybrid model and the high-fidelity method show reasonable agreement, while larger discrepancies occur for highly nonlinear regular waves. Specifically, regular waves with various steepness over different frequencies are focused in the present study, which supplements the understanding in applicability of these two groups of method.

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The coupled dynamic response computation for a semi-submersible platform of floating offshore wind turbine

Cited by 90 publications

References 12 publications

A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

A CFD study of coupled aerodynamic‐hydrodynamic loads on a semisubmersible floating offshore wind turbine

Effects of incident wind/wave directions on dynamic response of a SPAR-type floating offshore wind turbine system

Comparative Study of Numerical Methods for Predicting Wave-Induced Motions and Loads on a Semisubmersible

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