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- W2742930000 abstract "The flutter instability of flexible plates, or flags, in an axial flow is a canonical fluid-structure instability that results in the flags’ large-amplitude spontaneous and self- sustained flapping. This phenomenon consequently appears as an interesting mechanism for flow energy harvesting, if the mechanical energy associated with this solid motion can be converted into electrical form. One route to exploit this mechanism is the concept of so-called piezoelectric flags: these flexible plates covered by piezoelectric materials which convert mechanical energy into electrical energy through the materials’ mechanical deformation. In this thesis, we propose to study both experimentally and numerically this concept of energy harvesting. Our results illustrate promising perspective of harvesting energy with piezoelectric flags. We first show that by using circuits possessing resonant properties, the energy harvesting becomes more efficient through a frequency lock-in phenomenon. Second, we studied the energy-harvesting performance of two flags placed in the same fluid flow and are coupled through the flow (hydrodynamic coupling) and through the output circuit (electrodynamic coupling)." @default.
- W2742930000 created "2017-08-17" @default.
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- W2742930000 date "2015-11-06" @default.
- W2742930000 modified "2023-09-23" @default.
- W2742930000 title "Energy harvesting by piezoelectric flags" @default.
- W2742930000 hasPublicationYear "2015" @default.
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