Optimization Study of Marine Energy Harvesting from Vortex-Induced Vibration Using a Response-Surface Method

Vortex-induced vibration (VIV) of bluff bodies is one type flow-induced phenomenon, and the possibility using it to harvest hydrokinetic energy from marine currents has recently been revealed. To develop an optimal harvester, various parameters such as mass ratio, structural stiffness, inflow velocity need be explored, resulting in a large number test cases. This study primarily aims examine validity parameter optimization approach maximize capture efficiency VIV. The Box–Behnken design response-surface method (RSM-BBD) applied present study, for purpose, allows us efficiently explore these parameters, consequently reducing experiments. proper combinations operating variables were then identified this regard. Within algorithm, spring reduced velocity, vibrator diameter are set level factors. Correspondingly, conversion was taken observed value target. predicted results validated by comparing optimized values collected literature, well our simulations computational-fluid dynamics (CFD) model. Generally, conditions agreed with those simulated CFD experiments successfully somewhat, that lead highest harvesting VIV determined.