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Article

A Numerical Study on Hydrodynamic Performance of an Inclined OWC Wave Energy Converter with Nonlinear Turbine–Chamber Interaction based on 3D Potential Flow

1
Korea Research Institute of Ships and Ocean Engineering (KRISO), 1312-32 Yuseong-daero, Yuseong-gu, Daejeon 34103, Korea
2
Department of Naval Architecture and Ocean Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(3), 176; https://doi.org/10.3390/jmse8030176
Received: 4 February 2020 / Revised: 28 February 2020 / Accepted: 3 March 2020 / Published: 6 March 2020
(This article belongs to the Section Ocean Engineering)
In this study, a time-domain numerical method based on three-dimensional potential flow was developed to analyze the hydrodynamic characteristics of an inclined oscillating-water-column (OWC) wave energy converter (WEC). A finite element method was applied to solve the potential flow around and inside the OWC chamber. A turbine–chamber interaction was considered to take into account the pressure drop inside the OWC chamber, which is a nonlinear function of airflow speed via turbine operation. The instantaneous pressure drop was updated on the free-surface boundary condition inside the chamber in the time-domain to account for the coupling effect between the turbine and the chamber. The present numerical method was verified by comparing it with the model test results. The hydrodynamic characteristics of an inclined OWC chamber in terms of potential flow, such as the water column motion and the three-dimensional flow distribution around the chamber, were investigated. In terms of hydrodynamic performance, the energy conversion efficiency of the chamber showed a nonlinear response characteristic dependent on the incident wave height. In addition, numerical calculations were carried out to clarify the relationship between the main geometric parameters and the hydrodynamic response of the inclined OWC chamber. View Full-Text
Keywords: oscillating water column; wave energy converter; numerical modeling; finite element method; potential flow; nonlinear pressure drop; chamber design oscillating water column; wave energy converter; numerical modeling; finite element method; potential flow; nonlinear pressure drop; chamber design
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MDPI and ACS Style

Kim, J.-S.; Nam, B.W.; Kim, K.-H.; Park, S.; Shin, S.H.; Hong, K. A Numerical Study on Hydrodynamic Performance of an Inclined OWC Wave Energy Converter with Nonlinear Turbine–Chamber Interaction based on 3D Potential Flow. J. Mar. Sci. Eng. 2020, 8, 176. https://doi.org/10.3390/jmse8030176

AMA Style

Kim J-S, Nam BW, Kim K-H, Park S, Shin SH, Hong K. A Numerical Study on Hydrodynamic Performance of an Inclined OWC Wave Energy Converter with Nonlinear Turbine–Chamber Interaction based on 3D Potential Flow. Journal of Marine Science and Engineering. 2020; 8(3):176. https://doi.org/10.3390/jmse8030176

Chicago/Turabian Style

Kim, Jeong-Seok, Bo Woo Nam, Kyong-Hwan Kim, Sewan Park, Seung Ho Shin, and Keyyong Hong. 2020. "A Numerical Study on Hydrodynamic Performance of an Inclined OWC Wave Energy Converter with Nonlinear Turbine–Chamber Interaction based on 3D Potential Flow" Journal of Marine Science and Engineering 8, no. 3: 176. https://doi.org/10.3390/jmse8030176

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