Abstract
Results of an experimental study of a heaving, vertical, circular cylinder show that there is a relationship between water depth, draft and tank width for which minimum motion damping occurs. In addition, there is a minimum value of added-mass for a depth-diameter relationship. When the cylinder is in a resonant heaving condition at these ‘minimum’ parametric values, the wave energy conversion efficiency of the cylinder is shown to exceed the theoretically predicted maximum deep water value. Finally, for a cylinder spacing (tank width) of one radiant wavelength, the optimum depth value is shown to be four times the draft of the cylinder.
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