scholarly journals Model test and numerical simulation of OC3 spar type floating offshore wind turbine

2019 ◽  
Vol 11 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Hyeon-Jeong Ahn ◽  
Hyunkyoung Shin
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
Model Test ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Floating Offshore Wind Turbine

scholarly journals Model Test and Numerical Simulation of Grouted Connections for Offshore Wind Turbine Under Static Axial Load

2020 ◽  
Vol 8 (7) ◽  
pp. 543
Author(s):  
Weiqiu Zhong ◽  
Wuxu Li ◽  
Tao Yang ◽  
Deming Liu ◽  
Lintao Li
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Wind Turbine ◽  
Model Test ◽  
Axial Load ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Shear Keys ◽  
Better Than

The bearing capacity of the grouted connections is investigated through the model test and numerical simulation with two rates (low and high) and four kinds of specimens: shorter without shear keys, shorter with shear keys, longer with shear keys, and conical with shear keys. It reveals that the bearing characteristics of the specimen of longer with shear keys is worse than the specimen of conical with shear keys, but better than the specimen of shorter with shear keys. Moreover, the bearing characteristics of the specimen of shorter without shear keys is the worst one.

scholarly journals Model test of new floating offshore wind turbine platforms

2013 ◽  
Vol 5 (2) ◽  
pp. 199-209 ◽  
Author(s):  
Hyunkyoung Shin ◽  
Pham Thanh Dam ◽  
Kwang Jin Jung ◽  
Jinseob Song ◽  
Chaewhan Rim ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Model Test ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Floating Offshore Wind Turbine

scholarly journals Study on the Motion Characteristics of 10 MW Superconducting Floating Offshore Wind Turbine Considering 2nd Order Wave Effect

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6070
Author(s):  
Youngjae Yu ◽  
Thanh Dam Pham ◽  
Hyunkyoung Shin ◽  
Kwangtae Ha
Keyword(s):  
Wind Turbine ◽  
Test Data ◽  
Model Test ◽  
Wind Turbines ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Strong Wind ◽  
Floating Offshore Wind Turbine ◽  
Simulation Results ◽  
Motion Characteristics

Recently, several countries have made commitments to move to a net-zero emission by the year 2050 in a response to climate change. Among various renewable energy systems to realize the target, wind energy system has been gaining much attention as a favorable alternative source to fossil fuel energy. In particular, many floating offshore wind turbines (FOWT) are expected to be installed because of vast installation resources without water depth limit conditions, stable and strong wind resources, relatively low constraints on noise emission, and space restriction compared to onshore wind turbines. In this study, a 10 MW superconducting floating offshore wind turbine was modeled with a 1/90 scale ratio and was experimentally tested at the Ocean Engineering Widetank of the University of Ulsan. The model calibration of the scaled model was performed with free decay test and showed a good correlation with simulation results calculated from FAST V8 of NREL. The motion characteristics of the 10 MW superconducting FOWT semi-submersible type platform was investigated under regular waves and irregular waves through the comparison of model test data and simulation results. The study on the motion characteristics of the model showed that the simulation considering the 2nd order wave effects to hydrodynamic forces and moments provided better accuracy close to the model test data.

Model Test Comparisons of TLP, Spar-buoy and Semi-submersible Floating Offshore Wind Turbine Systems

2012 ◽  
Author(s):  
Richard W. Kimball ◽  
Andrew J. Goupee ◽  
Alexander J. Coulling ◽  
Habib J. Dahger
Keyword(s):  
Reynolds Number ◽  
Wind Turbine ◽  
Model Test ◽  
Functional Model ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Floating Offshore Wind Turbine ◽  
Power Spectral ◽  
Wave Basin ◽  
Modeling Code

Results of wave basin tests on three 1/50th scale floating wind turbine systems tested at the MARIN model basin are presented. The tests included a fully functional model wind turbine and a novel wind machine to produce swirl free inflow at a turbulence intensity of about 5%. Simultaneous stochastic wind and waves as well as multidirectional sea conditions were tested. This paper presents the experimental work as well as validation comparisons to NREL’s FAST floating offshore wind turbine dynamic modeling code. The paper also discusses the testing methodology and presents means to more closely match full scale performance at the low-Reynolds number operation regimes of the model test. Analyses presented include response amplitude operator and power spectral density plots for the spar-buoy, tensionleg platform and semi-submersible designs. The results presented for the systems highlight both turbine response effects and second-order wave diffraction forcing effects.

scholarly journals Experimental and Numerical Analysis of a 10 MW Floating Offshore Wind Turbine in Regular Waves

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2608
Author(s):  
Hyeonjeong Ahn ◽  
Hyunkyoung Shin
Keyword(s):  
Wind Turbine ◽  
Model Test ◽  
Model Tests ◽  
Offshore Wind ◽  
East Sea ◽  
Irregular Waves ◽  
Offshore Wind Turbine ◽  
Regular Waves ◽  
Floating Offshore Wind Turbine ◽  
Floating Offshore Wind Turbines

Floating offshore wind turbines (FOWTs) experience fluctuations in their platforms, owing to the various wave and wind conditions. These fluctuations not only decrease the output of the wind power generation system, but also increase the fatigue load of the structure and various equipment mounted on it. Therefore, when designing FOWTs, efficient performance with respect to waves and other external conditions must be ensured. In this study, a model test was performed with a 10 MW floating offshore wind turbine. The model test was performed by scaling down a 10 MW FOWT model that was designed with reference to a 5 MW wind turbine and a semisubmersible platform by the National Renewable Energy Laboratory and the DeepCwind project. A scale ratio of 1:90 was used for the model test. The depth of the East Sea was considered as 144 m and, to match the water depth with the geometric similarity of mooring lines, mooring tables were installed. The load cases used in the model test are combined environmental conditions, which are combined uniform wind, regular waves and uniform current. Especially, Model tests with regular waves are especially necessary, because irregular waves are superpositions of regular waves with various periods. Therefore, this study aimed to understand the characteristics of the FOWTs caused by regular waves of various periods. Furthermore, in this model test, the effect of current was investigated using the current data of the East Sea. The results obtained through the model tests were the response amplitude operator (RAO) and the effective RAO for a six degrees-of-freedom motion. The results obtained from the model tests were compared with those obtained using the numerical simulation. The purpose of this paper is to predict the response of the entire system observed in model tests through simulation.

Coupled Dynamic Response of a Spar Type Floating Offshore Wind Turbine

2014 ◽  
Author(s):  
Cheng Peng ◽  
Fasuo Yan ◽  
Jun Zhang
Keyword(s):  
Numerical Simulation ◽  
Wind Turbine ◽  
Wind Wave ◽  
Offshore Wind ◽  
Numerical Code ◽  
Offshore Wind Turbine ◽  
Mooring System ◽  
Floating Offshore Wind Turbine ◽  
The Impact ◽  
Near Future

FOWTs (Floating Offshore Wind Turbine) are feasible renewable devices to harness the wind energy in the near future. However, because of the complicated interactions among wind turbine, mooring system and the hull, the motion of a FOWT under the impact of severe wind, wave and current has not been well studied yet. This research focuses on the coupled numerical analysis of a FOWT. A numerical code COUPLE-FAST is developed by integrating two existing codes, namely, COUPLE and FAST, to carry out the task. In this study, a particular FOWT model is chosen for the numerical simulation, which consists of a NREL 5-MW baseline wind turbine and OC3-Hywind Spar. Although the numerical simulation is limited to this particular type of FOWTs, the results and related code (COUPLE-FAST) may be helpful to the design of FOWTs in the future.

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