Wave energy absorption by a floating air bag
Wave energy absorption by a floating air bag
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DOI：
10.1017/jfm.2016.811
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发表时间：
2017-02-10
影响因子：
3.7
通讯作者：
Hann, M.
中科院分区：
文献类型：
--
作者：
Kurniawan, A.;Chaplin, J. R.;Hann, M.
在水中压载的浮动安全气囊在波浪的作用下会膨胀和收缩。通过涡轮机将袋子连接到二次体积，将袋子转变为能够从海浪中产生有用能量的装置。该装置的小规模测量揭示了声学特性，并成功地进行了数值预测。由于其可压缩性，该装置的升沉共振周期可长于相同形状和尺寸的刚性装置，且不受任何相位控制。此外，改变气囊中的空气量会改变气囊的形状，从而改变气囊的动态响应，而改变涡轮机阻尼或空气体积比则会改变动态响应，而不会改变形状。
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.