Comparison of Hydrodynamic Load Predictions Between Engineering Models and Computational Fluid Dynamics for the OC4-DeepCwind Semi-Submersible

Maija A. Benitz, David P. Schmidt, Matthew A. Lackner, Gordon M. Stewart, Jason Jonkman, Amy Robertson

Research output: Contribution to conferencePaperpeer-review

42 Scopus Citations

Abstract

Hydrodynamic loads on the platforms of floating offshore wind turbines are often predicted with computer-aided engineering tools that employ Morison's equation and/or potentialflow theory. This work compares results from one such tool, FAST, the National Renewable Energy Laboratory's wind turbine computer-aided engineering tool, and the high-fidelity computational fluid dynamics (CFD) package, OpenFOAM, for the OC4- DeepCwind semi-submersible analyzed in the International Energy Agency Wind Task 30 project. Load predictions from Hydro- Dyn, the offshore hydrodynamics module of FAST, are compared with results from OpenFOAM. HydroDyn uses a combination of Morison's equation and potential-flow theory to predict the hydrodynamic forces on the structure, at a small computational cost compared to CFD. The implications of the assumptions in Hydro- Dyn are evaluated based on this code-to-code comparison.

Original languageAmerican English
Number of pages11
DOIs
StatePublished - 2014
EventASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014 - San Francisco, United States
Duration: 8 Jun 201413 Jun 2014

Conference

ConferenceASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014
Country/TerritoryUnited States
CitySan Francisco
Period8/06/1413/06/14

Bibliographical note

See NREL/CP-5000-61157 for preprint

NREL Publication Number

  • NREL/CP-5000-63478

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