期刊
JOURNAL OF FLUID MECHANICS
卷 812, 期 -, 页码 294-320出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2016.811
关键词
waves/free-surface flows; wave-structure interactions
资金
- EPSRC SuperGen Marine Energy Research Consortium [EP/K012177/1]
- EPSRC [EP/K012177/1, EP/M014738/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M014738/1, EP/K012177/1] Funding Source: researchfish
A floating air bag, ballasted in water, expands and contracts as it heaves under wave action. Connecting the hag to a secondary volume via a turbine transforms the bag into a device capable of generating useful energy from the waves. Small-scale measurements of the device reveal sonic interesting properties, which are successfully predicted numerically Owing to its compressibility, the device can have a heave resonance period longer than that of a rigid device of the same shape and size, without any phase control. Furthermore, varying the amount of air in the bag is found to change its shape and hence its dynamic response, while varying the turbine damping or the air volume ratio changes the dynamic response without changing the shape.
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