A Numerical Study on Hydrodynamic Energy Conversions of OWC-WEC with the Linear Decomposition Method under Irregular Waves

Jeong-Seok Kim, Kyong-Hwan Kim, Jiyong Park, Sewan Park and Seung Ho Shin
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Jeong-Seok Kim: Korea Research Institute of Ships and Ocean Engineering (KRISO), Deajeon 34103, Korea
Kyong-Hwan Kim: Korea Research Institute of Ships and Ocean Engineering (KRISO), Deajeon 34103, Korea
Jiyong Park: Korea Research Institute of Ships and Ocean Engineering (KRISO), Deajeon 34103, Korea
Sewan Park: Korea Research Institute of Ships and Ocean Engineering (KRISO), Deajeon 34103, Korea
Seung Ho Shin: Korea Research Institute of Ships and Ocean Engineering (KRISO), Deajeon 34103, Korea

Energies, 2021, vol. 14, issue 6, 1-17

Abstract: A numerical study was performed to investigate the applicability of the linear decomposition method for the hydrodynamic energy conversion of an oscillating-water-column type wave energy converter (OWC-WEC). Hydrodynamic problems of the OWC chamber were decomposed into the excitation and radiation problems with the time-domain numerical method based on the linear potential theory. A finite element method was applied to solve the potential flow in the entire fluid domain including OWC chamber structure. The validity of the linear decomposition method was examined by comparing with the direct interaction method for the turbine–chamber interaction based on the linear pressure drop characteristics. In order to estimate the hydrodynamic energy conversion performance under the irregular waves, the response spectrum method was applied with the transfer function based on the linear decomposition method. Under the various irregular wave conditions, the pneumatic power of OWC-WEC calculated by the response spectrum based on the linear decomposition method agreed well with the direct irregular wave simulation results.

Keywords: oscillating water column; wave energy converter; hydrodynamic; NWT; turbine–chamber interaction; potential flow; linear decomposition method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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