Numerical Modelling of Dynamic Responses of a Floating Offshore Wind Turbine Subject to Focused Waves

Zhou, Yang; Xiao, Qing; Liu, Yuanchuan; Incecik, Atilla; Peyrard, Christophe; Li, Sunwei; Pan, Guang

doi:10.3390/en12183482

Cited by 52 publications

(31 citation statements)

References 30 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, under certain conditions the numerical model could not accurately predict the response of the platform. From another point of view, [25] propose a holistic model of a FOWT that includes the most relevant physical effects of the system dynamics. It consists, at its core, of a flexible multibody system.…”

Section: Related Workmentioning

confidence: 99%

General Methodology for the Identification of Reduced Dynamic Models of Barge-Type Floating Wind Turbines

2021

View full text Add to dashboard Cite

Floating offshore wind turbines (FOWT) are designed to overcome some of the limitations of offshore bottom-fixed ones. The development of computational models to simulate the behavior of the structure and the turbine is key to understanding the wind energy system and demonstrating its feasibility. In this work, a general methodology for the identification of reduced dynamic models of barge-type FOWTs is presented. The method is described together with an example of the development of a dynamic model of a 5 MW floating offshore wind turbine. The novelty of the proposed identification methodology lies in the iterative loop relationship between the identification and validation processes. Diversified data sets are used to select the best-fitting identified parameters by cross evaluation of every set among all validating conditions. The data set is generated for different initial FOWT operating conditions. Indeed, an optimal initial condition for platform pitch was found to be far enough from the system at rest to allow the dynamics to be well characterized but not so far that the unmodeled system nonlinearities were so large that they affected significantly the accuracy of the model. The model has been successfully applied to structural control research to reduce fatigue on a barge-type FOWT.

show abstract

Section: Related Workmentioning

confidence: 99%

General Methodology for the Identification of Reduced Dynamic Models of Barge-Type Floating Wind Turbines

2021

View full text Add to dashboard Cite

show abstract

“…The frequency dependent added mass matrix (A), radiation damping matrix (B R ), and excitation force vector (f e ) are calculated by the boundary element method code NEMOH [26]. This code is used because it is open-source and has been validated for floating wind turbine and WEC models [27,28]. Its primary inputs are meshes of the spar and BA bodies, which were created using the open-source meshing package Gmsh.…”

Section: Added Mass Radiation Damping and Wave Excitation Forcementioning

confidence: 99%

The Prospect of Combining a Point Absorber Wave Energy Converter with a Floating Offshore Wind Turbine

et al. 2021

View full text Add to dashboard Cite

With recent advances in offshore floating wind and wave energy technology, questions have emerged as to whether the two technologies can be combined to reduce their overall levelised cost of energy. In this paper, the potential for combining a floating offshore wind turbine to a point absorbing wave energy converter is investigated. The focus of the investigation is how much power might be produced by a combined floating wind and wave energy converter system, and the resultant changes in motion of the floating wind platform. A model for the combined wave and wind system is developed which uses the standardised NREL OC3 5 MW spar type wind turbine and a cylindrical buoyant actuator (BA), which is attached to the spar via a generic wave power take-off system (modelled as a spring-damper system). Modelling is conducted in the frequency domain and the tests span a wide range of parameters, such as wave conditions, BA sizes, and power take-off coupling arrangements. It is found that the optimal (with respect to power production) BA size is a draft and radius of approximately 14 m. It is found that this BA can theoretically produce power in the range of 0.3 to 0.5 MW for waves with a significant wave height of 2 m, and has the potential to produce power greater or near to 1 MW for waves with a significant wave height of at least 3 m. However, it is also found that, in terms of the relative capture width, significantly smaller BAs are optimal, and that these smaller BA sizes less significantly alter the motion of the floating wind platform.

show abstract

“…This effect may result in the overall performance change of the turbine. The aim is achieved by using our in-house hydro-aero-mooring CFD tool [7][8][9][10] with the Mann wind turbulence model. The magnitude and spatial distribution of the turbulence are put in as boundary condition inputs to the CFD solver.…”

Section: Introductionmentioning

confidence: 99%

A CFD Study for Floating Offshore Wind Turbine Aerodynamics in Turbulent Wind Field

Zhou

Xiao

Liu

et al. 2021

ASME 2021 3rd International Offshore Wind Technical Conference

View full text Add to dashboard Cite

The present study is aimed at investigating the turbulent wind effect on FOWT through the usage of a high-fidelity computational fluid dynamics (CFD) method. This method is believed to resolve the wind field, giving us a more in-depth examination into the aerodynamics of FOWT. The work is built upon our previous studies on the modelling of a coupled aero-hydro-mooring FOWT system under regular wave and uniform wind. In the present study, we replaced the previously uniform wind with a temporal and spatial variable turbulent wind field using a time-varying spectrum. The turbulent wind is generated with Mann’s wind turbulence model while the Von Karman wind spectrum is used to represent wind turbulence. The present study shows that when turbulent wind is present, there may be fluctuations of the rotor thrust and power outputs, causing the non-uniform wake region. Despite this, both the dynamic motions and the mooring tensions of the floater are not significantly influenced by the wind turbulence under the present inflow wind conditions.

show abstract

Numerical Modelling of Dynamic Responses of a Floating Offshore Wind Turbine Subject to Focused Waves

Cited by 52 publications

References 30 publications

General Methodology for the Identification of Reduced Dynamic Models of Barge-Type Floating Wind Turbines

General Methodology for the Identification of Reduced Dynamic Models of Barge-Type Floating Wind Turbines

The Prospect of Combining a Point Absorber Wave Energy Converter with a Floating Offshore Wind Turbine

A CFD Study for Floating Offshore Wind Turbine Aerodynamics in Turbulent Wind Field

Contact Info

Product

Resources

About