- Volume 6 Issue 1
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Comparison of simulated platform dynamics in steady/dynamic winds and irregular waves for OC4 semi-submersible 5MW wind-turbine against DeepCwind model-test results
- Kim, H.C. (Civil Engineering, Texas A&M University, College Station) ;
- Kim, M.H. (Civil Engineering, Texas A&M University, College Station)
- Received : 2015.12.17
- Accepted : 2016.02.11
- Published : 2016.03.25
The global performance of the 5 MW OC4 semisubmersible floating wind turbine in random waves with or without steady/dynamic winds is numerically simulated by using the turbine-floater-mooring fully coupled dynamic analysis program FAST-CHARM3D in time domain. The numerical simulations are based on the complete second-order diffraction/radiation potential formulations along with nonlinear viscous-drag force estimations at the body's instantaneous position. The sensitivity of hull motions and mooring dynamics with varying wave-kinematics extrapolation methods above MWL(mean-water level) and column drag coefficients is investigated. The effects of steady and dynamic winds are also illustrated. When dynamic wind is added to the irregular waves, it additionally introduces low-frequency wind loading and aerodynamic damping. The numerically simulated results for the 5 MW OC4 semisubmersible floating wind turbine by FAST-CHARM3D are also extensively compared with the DeepCWind model-test results by Technip/NREL/UMaine. Those numerical-simulation results have good correlation with experimental results for all the cases considered.
wind energy;FOWT (Floating Offshore Wind Turbine);OC4 semi-submersible;turbine-hull-mooring fully coupled dynamics;second-order wave diffraction QTF;FAST-CHARM3D;5MW wind-turbine;viscous drag;wave-crest kinematics;Irregular waves;steady/dynamic wind
Grant : Development of the design technologies for a 10MW class wave and offshore wind hybrid power generation system
Supported by : Ministry of Oceans and Fisheries
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