Hydrodynamic Analysis of a Breakwater-Integrated Heaving-Buoy-Type Wave Energy Converter with an Optimal Artificial Damping Scheme

A three-dimensional frequency-domain numerical wave tank (FR-NWT) based on the Rankine panel method was developed. An optimal artificial damping zone (ADZ) scheme was first applied to the FR-NWT to prevent reflection waves from the end walls. Parametric studies of ramp function shape with artificial...

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Bibliographic Details
Published in:Applied sciences 2022-04, Vol.12 (7), p.3401
Main Authors: Jeong, Ho-Jin, Kim, Sung-Jae, Koo, WeonCheol
Format: Article
Language:English
Subjects:
Alternative energy sources
artificial damping scheme
Boundary conditions
breakwater-integrated
Breakwaters
Buoys
Converters
Damping
Efficiency
frequency domain
Frequency domain analysis
Heaving
Integral equations
Kinematics
motion amplification
numerical wave tank
Panel method (fluid dynamics)
Radiation
Ramp functions
Renewable resources
Velocity
Wave energy
wave energy converter
Wave power
Wave reflection
Wave tanks
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Summary:A three-dimensional frequency-domain numerical wave tank (FR-NWT) based on the Rankine panel method was developed. An optimal artificial damping zone (ADZ) scheme was first applied to the FR-NWT to prevent reflection waves from the end walls. Parametric studies of ramp function shape with artificial damping coefficients and damping zone length were conducted to find a proper damping scheme for the frequency domain program. Applying both the Sommerfeld radiation condition and the ADZ scheme to the frequency domain program can reduce the length of the ADZ to less than one wavelength. The FR-NWT developed by the authors was used to calculate the hydrodynamic response of a hemispherical-heaving buoy wave energy converter (WEC) integrated with a seawall-type breakwater of infinite length. A linear power take-off system was used to calculate power generation of the WEC. The global motion of the WEC combined with the breakwater was up to 1.85 times greater than that of the WEC without the breakwater. Moreover, the capture width ratio of the WEC increased approximately 3.67 times more than that of the WEC without the breakwater.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12073401