Inductive effects on energy harvesting piezoelectric flag

Abstract : Interaction between a flexible flag and a flow leads to a canonical fluid–structure instability which produces self-sustained vibrations, from which mechanical energy could be converted to electrical energy through piezoelectric materials covering the flag and thus being deformed by its motion. We study the possibility of harvesting this energy, especially the effect of an inductive circuit on the energy harvesting process. A destabilization of the coupled system is observed after adding an inductance. In the nonlinear case, the harvesting efficiency increases significantly at lock–in between the frequencies of the fluttering flag and the electrical circuit.
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Yifan Xia, Sébastien Michelin, Olivier Doaré. Inductive effects on energy harvesting piezoelectric flag. XXIeme Congrès Français de Mécanique, Aug 2013, Bordeaux, France. ⟨hal-01136605⟩

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