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Numerical prediction of wave excitation forces on a fixed tension leg platform concept for offshore wind turbines
Citation
Khanam, S and Abdussamie, N and Ojeda, R, Numerical prediction of wave excitation forces on a fixed tension leg platform concept for offshore wind turbines, Proceedings of Australasian Coasts & Ports Conference 2019, 10-13 September 2019, Hobart, Australia, pp. 1-6. ISBN 978-1-925627-23-7 (2019) [Refereed Conference Paper]
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Official URL: https://coastsandports2019.com.au/
Abstract
To predict wave excitation forces on a fixed Tension Leg Platform Wind Turbine (TLPWT), two numerical
software packages were used, namely the CFD code STAR-CCM+ and ANSYS AQWA. The CFD code solved
the fully-nonlinear Navier-Stokes equations in a time domain whereas ANSYS AQWA solved the linear
diffraction problem in a frequency domain. In both domains, the horizontal wave excitation forces on a generic
TLP structure under several deterministic regular wave conditions of a mild sea state were predicted. The size
of the mesh/panel was fine-tuned to yield optimum results for both solvers. It was found that the horizontal
forces obtained by the linear diffraction solver were larger in magnitude than CFD predictions. The linear
diffraction solver provided an insight into the horizontal force experienced by the TLP structure, and hence it
could be used to verify CFD results. However, as the linear diffraction theory does not account for the effect
of turbulence, viscous effects or the effect of the air phase, CFD codes could be used to investigate such
phenomena and provide further details.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | offshore wind turbines, tension leg platforms, excitation forces, numerical predictions |
Research Division: | Engineering |
Research Group: | Maritime engineering |
Research Field: | Marine engineering |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Adaptation to climate change |
Objective Field: | Climate change adaptation measures (excl. ecosystem) |
UTAS Author: | Abdussamie, N (Dr Nagi Abdussamie) |
UTAS Author: | Ojeda, R (Dr Roberto Ojeda Rabanal) |
ID Code: | 135509 |
Year Published: | 2019 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2019-10-28 |
Last Modified: | 2020-04-22 |
Downloads: | 0 |
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