In this study, the performance of an energy-harvesting device using wake-induced vibration is examined. An experimental setup was constructed that included a submerged cylinder vibrated by vortex-induced forces and a generator driven by the motion of the cylinder. We determined the diameter of the cylinder to optimize the range of Reynolds numbers to maximize the lift force acting on the cylinder and placed a fixed cylinder near the moving one to increase the range of synchronization and the amplitude. The measurement results showed that these design features can increase the energy conversion efficiency.
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Nishi et al. (2015) studied this question.
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