Research Papers: Ocean Renewable Energy

Simulation of Wind, Waves, and Currents During Hurricane Sandy for Planned Assessment of Offshore Wind Turbines

[+] Author and Article Information
Eungsoo Kim

Steel Structure Research Group,
Steel Solution Marketing Department,
Songdo, Incheon 21985, South Korea
e-mail: eungsoo.kim@posco.com

Lance Manuel

Department of Civil, Architectural, and Environmental Engineering,
University of Texas,
Austin, TX 78712
e-mail: lmanuel@mail.utexas.edu

1Corresponding author.

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the Journal of Offshore Mechanics and Arctic Engineering. Manuscript received June 20, 2017; final manuscript received May 6, 2019; published online June 19, 2019. Assoc. Editor: Muk Chen Ong.

J. Offshore Mech. Arct. Eng 141(6), 061904 (Jun 19, 2019) (9 pages) Paper No: OMAE-17-1091; doi: 10.1115/1.4043777 History: Received June 20, 2017; Accepted May 09, 2019

The simulation of wind and wave fields for the evaluation of jacket-supported offshore wind turbines during Hurricane Sandy of 2012 is the focus of this study. For realistic load assessment of offshore wind turbines, it is important that coupled wind, wave, and current fields with appropriate spatial resolution are provided throughout the evolution of the hurricane. A numerical model describing the hurricane track and intensity variation with time is used to generate the coupled wind, wave, and current fields. Time series of turbulent wind fields and coupled wave kinematics are generated using the hurricane simulation output, and a detailed procedure is presented. These coupled wind, wave, and current fields form the inputs for the analysis of a 5-MW offshore wind turbine supported on a jacket platform sited in 50 m of water and assumed located in the path of Hurricane Sandy. The turbine’s and support structure’s performance under the simulated loading conditions is the subject of a separate study.

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Fig. 1

Location of Site No. 1 and the simulated track of Hurricane Sandy evaluated based on the UMCM output (compared with a best-track database)

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Fig. 2

Variation with time during Hurricane Sandy of the full-field wind direction (thin arrows), local wind direction (thick darker arrows), and local wave direction (thick lighter arrows) at the locations of the ten selected sites: (a) at 10 h and (b) at 40 h

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Fig. 3

Variation of Hurricane Sandy wave spectra with time (at and after 40 h) at the location of Site No. 1 with 50-m water depth (dark arrow, wave direction; light arrow, wind direction): (a) at 40 h, (b) at 40 h + 1 min, (c) at 40 h + 10 min, and (d) at 40 h + 60 min

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Fig. 4

Flowchart for the numerical simulation of second-order directional waves

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Fig. 5

Procedure for simulation of the turbulent wind field during Hurricane Sandy

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Fig. 6

Variation with time of (a) the horizontal mean wind speed (m/s) and (b) the vertical mean wind speed (m/s) (at the location of Site No. 1 with 50-m water depth)

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Fig. 7

Mean wind shear interpolated from the WRF output for Hurricane Sandy versus that estimated by the classical log law (corresponding to the time, 40 h, after 00:00 UTC on October 28, 2012, at Site No. 1)



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