Discussion of solutions for basin model tests of FOWTs in combined waves and wind

Gueydon, Sébastien; Bayati, Ilmas; Ridder, E. J. de

doi:10.1016/j.oceaneng.2020.107288

Cited by 50 publications

(21 citation statements)

References 22 publications

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“…As Gueydon et al 6 highlighted, improved accuracy of numerical tools and concise quantification of uncertainty for experimental tools can be achieved if “hydrodynamic testing facilities engage with more critical comparisons of results obtained from all available FOWT testing techniques,” and validation of both numerical and experimental tools would also benefit from the inclusion of test data from full‐scale prototypes in real ocean‐conditions. However, it should be considered that while full‐scale turbines continue to get larger, the full physical test method will become increasingly impractical.…”

Section: Discussionmentioning

confidence: 99%

A review of modelling techniques for floating offshore wind turbines

et al. 2021

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Modelling floating offshore wind turbines (FOWTs) is challenging due to the strong coupling between the aerodynamics of the turbine and the hydrodynamics of the floating platform. Physical testing at scale is faced with the additional challenge of the scaling mismatch between Froude number and Reynolds number due to working in the two fluid domains, air and water. In the drive for cost-reduction of floating wind energy, designers may be seeking to move towards high-fidelity numerical modelling as a substitute for physical testing. However, the numerical engineering tools typically used for FOWT modelling are considered as mid-fidelity to low-fidelity tools, and currently lack the level of accuracy required to do so. Furthermore, there is a lack of operational FOWT data available for further development and validation.High-fidelity tools, such as CFD, have greater accuracy but are cumbersome tools and still require validation. Physical scale model testing therefore continues to play an essential role in the development of FOWTs both as a source of validation data for numerical models and as an important development step along the path to commercialization of all platform concepts. The aim of this paper is to provide an overview of both numerical modelling and physical FOWT scale model testing approaches and to provide guidance on the selection of the most appropriate approach (or combination of approaches). The current state-of-the-art will be discussed along with current research trends and areas for further investigation.

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Section: Discussionmentioning

confidence: 99%

A review of modelling techniques for floating offshore wind turbines

et al. 2021

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“…Note that H s of Equation ( 3) underestimates the actual significant wave height as m 0 is integrated on a limited range of frequencies in Equation (1). Aside from m 0 and H s , another metric is introduced to provide us with an estimated value of the realised peak period, T p [12], calculated from:…”

Section: Metricsmentioning

confidence: 99%

“…One of the key aims of the EU H2020 MaRINET2 project 1 is to improve the quality, robustness, and accuracy of laboratory testing of ocean energy devices. Scaled model testing in a laboratory is an integral part of the development process for many offshore renewable energy (ORE) technologies.…”

Section: Introductionmentioning

confidence: 99%

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A Heuristic Approach for Inter-Facility Comparison of Results from Round Robin Testing of a Floating Wind Turbine in Irregular Waves

Gueydon

Judge

Lyden

et al. 2021

JMSE

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This paper introduces metrics developed for analysing irregular wave test results from the round robin testing campaign carried out on a floating wind turbine as part of the EU H2020 MaRINET2 project. A 1/60th scale model of a 10 MW floating platform was tested in wave basins in four different locations around Europe. The tests carried out in each facility included decay tests, tests in regular and irregular waves with and without wind thrust, and tests to characterise the mooring system as well as the model itself. While response amplitude operations (RAOs) are a useful tool for assessing device performance in irregular waves, they are not easy to interpret when performing an inter-facility comparison where there are many variables. Metrics that use a single value per test condition rather than an RAO curve are a means of efficiently comparing tests from different basins in a more heuristic manner. In this research, the focus is on using metrics to assess how the platform responds with varying wave height and thrust across different facilities. It is found that the metrics implemented are very useful for extracting global trends across different basins and test conditions.

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“…The use of cables or active fans demands a code integration with real-time rotor load prediction in a software-in-the-loop scheme (SIL). A more detailed review of these experimental techniques can be found in [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Seakeeping Tests of a FOWT in Wind and Waves: An Analysis of Dynamic Coupling Effects and Their Impact on the Predictions of Pitch Motion Response

Amaral

Mello

Carmo

et al. 2021

JMSE

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The present work highlights some of the dynamic couplings observed in a series of tests performed in a wave basin with a scaled-model of a Floating Offshore Wind Turbine (FOWT) with semi-submersible substructure. The model was moored by means of a conventional chain catenary system and an actively controlled fan was used for emulating the thrust loads during the tests. A set of wave tests was performed for concomitant effects of not aligned wave and wind. The experimental measurements illustrate the main coupling effects involved and how they affect the FOWT motions in waves, especially when the floater presents a non-negligible tilt angle. In addition, a frequency domain numerical analysis was performed in order to evaluate its ability to capture these effects properly. The influence of different modes of fan response, floater trim angles (changeable with ballast compensation) and variations in the mooring stiffness with the offsets were investigated in the analysis. Results attest that significant changes in the FOWT responses may indeed arise from coupling effects, thus indicating that caution must be taken when simplifying the hydrodynamic frequency-domain models often used as a basis for the simulation of FOWTs in waves and in optimization procedures for the design of the floater and mooring lines.

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Discussion of solutions for basin model tests of FOWTs in combined waves and wind

Cited by 50 publications

References 22 publications

A review of modelling techniques for floating offshore wind turbines

A review of modelling techniques for floating offshore wind turbines

A Heuristic Approach for Inter-Facility Comparison of Results from Round Robin Testing of a Floating Wind Turbine in Irregular Waves

Seakeeping Tests of a FOWT in Wind and Waves: An Analysis of Dynamic Coupling Effects and Their Impact on the Predictions of Pitch Motion Response

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