期刊
OCEAN ENGINEERING
卷 224, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2021.108753
关键词
Gap resonance; Wave height amplification; Heave motion; Harmonic analysis; OpenFOAM
资金
- National Key Research and Development Program [2017YFC1404200]
- National Natural Science Foundation of China [51911530205]
- Natural Science Foundation of Jiangsu Province [BK20201455]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [20KJD170005]
- Qing Lan Project of Jiangsu Universities
- UK EPSRC [EP/R007519/1]
- Royal Academy of Engineering [UK-CIAPP/73]
- Royal Society [IEC\NSFC\181321]
- EPSRC [EP/M022382/1] Funding Source: UKRI
Investigation of fluid resonance inside a narrow gap between two side-by-side boxes using OpenFOAM revealed that the motion of the upstream box affects the hydrodynamic behavior of the resonant fluid, influencing wave height and harmonic components. The heave motion of the upstream box resulted in changes in resonant frequency, wave height, reflection coefficient, and energy loss coefficient.
Fluid resonance inside a narrow gap between two side-by-side boxes is investigated based on an open-source CFD package, OpenFOAM. An upstream box heaves freely under wave actions and a downstream box remains fixed. The focus of this work is to study the influence of the motion of the upstream box on the hydrodynamic behavior of the resonant fluid inside the gap. The hydrodynamic behavior considered in this study includes the wave height inside the gap, heave displacement and their harmonic components, and reflection, transmission and energy loss coefficients. For comparison, the configuration in which the two boxes are fixed is considered. It was found that the heave motion of the upstream box increases the fluid resonant frequency and significantly reduces the resonant wave height in the gap. The frequencies at which the maximum and minimum heave displacements of the upstream box are observed to obviously deviate from the fluid resonant frequency. For the wave height in the gap and heave displacement, the effects of the incident wave height on their harmonic components are different. The heave motion of the upstream box results in a larger reflection coefficient and smaller energy loss coefficient.
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