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논문 기본 정보

자료유형
학술저널
저자정보
S.D.G.S.P. Gunawardane (University of Peradeniya) Sudesh Rathnayake (University of Peradeniya) Byung-Ha Kim (Korean Maritime and Ocean University) Young-Ho Lee (Korean Maritime and Ocean University)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제44권 제1호
발행연도
2020.2
수록면
75 - 81 (7page)
DOI
10.5916/jamet.2020.44.1.75

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초록· 키워드

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“Pendulor” device is a top-hinged Oscillating Wave Surge Converter (OWSC) type device bounded by a caisson with one side open to the sea. When the flap of the OWSC has a bottom gap and placed at one-eighth of wavelength distance from the back wall of the caisson, it was identified that an additional resonance mode could trigger. That mode is identified as “pumping mode”, and this paper reports evidence of the occurrence of the pumping mode through numerical and PIV investigations. Initially, Computational Fluid Dynamics(CFD) based Numerical Wave Tank(NWT) was created using STAR CCM+ to be compatible with the experimental wave tank. Then the device ran on the NWT and compared with the wave tank experiments. Experimental and CFD comparisons of wavelengths, the rotational angle of the flap are closely matched and hence the CFD model is considered as reasonably accurate for further investigations. Then by using the validated CFD model, the flow pattern at the vicinity of the bottom gap was further investigated and compared with particle image velocimetry (PIV) data. Both CFD and PIV results are closely matched to each other. Therefore, it is revealed the occurrence of “pumping mode” and evanescence waves when the flap is placed 1/8th distance from the back wall with a bottom gap.

목차

Abstract
1. Introduction
2. Formulation of Computational Domain
3. Theoretical Background and CFDTechniques
4. Results and Discussion
5. Conclusion
References

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