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http://dx.doi.org/10.26748/KSOE.2022.010

A Study on the Viscous Damping Effect According to the Shape of the Inclined OWC Chamber Skirt  

Jung, Hyen-Cheol (Department of Naval Architecture and Ocean Engineering, Inha University)
Koo, Weoncheol (Department of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of Ocean Engineering and Technology / v.36, no.4, 2022 , pp. 270-279 More about this Journal
Abstract
In this study, numerical analysis and experiments were performed to analyze the viscous damping effect according to the shape of the chamber skirt of the breakwater-linked inclined oscillating water column wave energy converter. Experiments were conducted using a two-dimensional mini wave tank and verified by comparing the results of a computational fluid dynamics numerical analysis. Pointed and rounded skirts were modeled to compare the effect of viscous damping when incident waves enter the chamber, and the difference in the displacement of the water surface in the chamber was compared according to the wave period for the two skirt shapes. The wave elevation in the chamber in the rounded-skirt condition was larger than the pointed-skirt condition in all wave periods, which was approximately 47% greater at 0.9 s of the incident wave period. Therefore, extracting the maximum energy through the optimal orifice is possible while minimizing the energy attenuation in the rounded-skirt condition.
Keywords
Inclined oscillating water column; Two-dimensional mini wave tank; Open chamber; Orifice; Skirt shape; Viscous damping effect;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Elhanafi, A.S.S.M. (2017). Performance and Survivability of Offshore Oscillating Water Column Wave Energy Converters (Ph.D. Thesis). University of Tasmania, Tasmania, Australia.
2 Kim, J.-H., Kim, Y.-T., & Lee, Y.-H. (2007). 해양에너지를 이용한 파력발전시스템 [Wave Power Generation System using Marine Energy]. The KSFM Journal of Fluid Machinery, 10(1), 65-76, https://doi.org/10.5293/kfma.2007.10.1.065   DOI
3 Koo, W.C., Kim, M.H., & Choi, Y.R. (2010). Numerical Analysis of Chamber Flow and Wave Energy Conversion Efficiency of a Bottom-mounted Oscillating Water Column Wave Power Device. Journal of the Society of Naval Architects of Korea, 47(3), 388-397. https://doi.org/10.3744/SNAK.2010.47.3.388   DOI
4 Kim, J.R., Bae, Y.H., & Cho, I.H. (2014). Design of Wave Energy Extractor with a Linear Electric Generator Part I. Design of a Wave Power Buoy. Journal of the Korean Society for Marine Environment & Energy, 17(2), 146-152. https://doi.org/10.7846/JKOSMEE.2014.17.2.146   DOI
5 Kim, S.H., Ryu, W.J., Shin, S.H., Hong, K.Y., Kim, Y.D., & Kim, G.W. (2012). Application of the Orifice as a Turbine Substitute of OWC Wave Energy Converter. Proceedings of the Korean Society for Marine Environment & Energy conference, Goseong, Korea, 48-54.
6 Seo, D.W., Huh, T., Kim, M., Oh, J.W., & Cho, S.G. (2020). A Design and Analysis of Pressure Predictive Model for Oscillating Water Column Wave Energy Converters Based on Machine Learning. Journal of the Korea Academia-Industrial cooperation Society, 21(11), 672-682. https://doi.org/10.5762/KAIS.2020.21.11.672   DOI
7 Vyzikas, T., Deshoulieres, S., Giroux, O., Barton, M., & Greaves, D. (2017). Numerical Study of Fixed Oscillating Water Column with RANS-type Two-phase CFD Model. Renewable Energy, 102(B), 294-305. https://doi.org/10.1016/j.renene.2016.10.044   DOI
8 Wang, R.Q., & Ning, D.Z. (2020). Dynamic Analysis of Wave Action on an OWC Wave Energy Converter under the Influence of Viscosity. Renewable Energy, 150, 578-588. https://doi.org/10.1016/j.renene.2020.01.007   DOI
9 Roh, C., Lim, C.-H., Kim, K.-H., Hong, K.-Y., & Shin, S.-H. (2020). A Study on Verification of Energy Storage System Operational Algorithm for Wave Energy Converters Linked Microgrid. Journal of the Korean Society for Marine Environment & Energy, 23(2), 81-96. https://doi.org/10.7846/JKOSMEE.2020.23.2.81   DOI
10 Koo, W.C., Kwon, J.S., Kim, J.D., Kim, S.J., Kim, M.W., & Choi, M.K. (2012). Experimental Study of Shape Parameter of Land-based OWC Wave Energy Converter. Journal of Ocean Engineering and Technology, 26(3), 33-38. https://doi.org/10.5574/KSOE.2012.26.3.033   DOI
11 Kwon, D.S, Kim, S.J., Koo W.C. (2019). A Parametric Study of the Wave-Generation Performance of a Piston-Type Wave Maker. Journal of Ocean Engineering and Technology, 33(6), 504-509. https://doi.org/10.26748/KSOE.2019.041   DOI
12 Park, S., Nam, B.W., Kim, K.H., & Hong, K.A. (2018). Parametric Study on Oscillating Water Column Wave Energy Converter Applicable to Breakwater. Journal of Advanced Research in Ocean Engineering, 4(2), 66-77. https://doi.org/10.5574/JAROE.2018.4.2.066   DOI
13 Simonetti, I., Cappietti, L., Elsafti, H., & Oumeraci, H. (2018). Evaluation of Air Compressibility Effects on the Performance of fixed OWC Wave Energy Converters using CFD Modelling. Renewable Energy, 119, 741-753. https://doi.org/10.1016/j.renene.2017.12.027   DOI
14 Boccotti, P. (2003). On a New Wave Energy Absorber. Ocean Engineering, 30(9), 1191-1200. https://doi.org/10.1016/S0029-8018(02)00102-6   DOI
15 Elhanafi, A., Fleming, A., Macfarlane, G., Leong, Z., 2016. Numerical Energy Balance Analysis for an Onshore Oscillating Water Column-wave Energy Converter. Energy, 116(1), 539-557. http://doi.org/10.1016/j.energy.2016.09.118   DOI
16 Hong, D.C., Shin, S.H., Hong, K.Y., & Hong, S.W. (2006). Study of Nearshore OWC Wave Power Absorbing Breakwater. Proceedings of the Korea Committee for Ocean Resources and Engineering Conference, Busan, Korea, 465-468.