Abstract
This contribution to the CCP-WSI FOWT comparative study presents
numerical results from three popular potential-flow-based models,
including OpenFAST, Orcaflex and WEC-Sim. The subject of the study
is the VolturnUS-S semi-submersible platform with the IEA 15MW
reference wind turbine. Decay tests and focused waves are simulated in
the numerical models, and these are compared to experimental results,
using a 1:70 scale model of the system. Comparisons between the
numerical models and physical experiments are made. Results of surge
motion response and line tension are presented for the decay tests and
focused wave tests. The numerical models are seen to underpredict surge
response in the low frequency regions of the extreme focused wave test
for all three numerical models and of the operational focused wave test
for WEC-Sim. Adding an empirically tuned coefficient proportional to
the relative velocity between the platform and the water particles in
WEC-Sim is seen to improve results in surge motion response
significantly, resulting in better agreement than any of the other
numerical models. Mooring line tensions are also compared in this study,
and an underprediction is observed during the extreme focused wave test
for the fore and aft mooring lines, including in the wave-frequency
region.
| Original language | English |
|---|---|
| Article number | ISOPE-I-23-067 |
| Pages (from-to) | 454-460 |
| Number of pages | 7 |
| Journal | The Proceedings of The Thirty-third (2023) International OCEAN AND POLAR ENGINEERING CONFERENCE |
| Volume | 9781880653807 |
| Publication status | Published - 19 Jun 2023 |
| Event | 33rd International Ocean and Polar Engineering Conference, ISOPE 2023 - Ottawa, Canada Duration: 19 Jun 2023 → 23 Jun 2023 |
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Ocean Engineering
- Mechanical Engineering
Keywords
- Floating offshore wind turbine platform
- potential flow modelling
- scaled experiments
- semi-submersible
