Publikation: Energy harvesting from passive oscillation of inverted foil
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A numerical study is carried out to investigate the energy harvesting from an inverted foil undergoing flow-induced pitching oscillation for reduced velocity Ur = 1–45 and damping ratio ζ = 0–0.295. The benchmark results with undamped foil (ζ = 0) indicate that the foil does not oscillate for Ur ≤ 27 but does oscillate with increasing amplitude for 27 < Ur < 34 and with constant amplitude for Ur ≥ 34. Lissajous diagrams of moment coefficient against the foil displacement are linked to the energy harvesting, showing how Ur and ζ affect the oscillating amplitude, reduced frequency, wake structures, and power exchange between the foil and the flow. The energy harvesting efficiency η up to 15.06% is achieved at Ur = 37 and ζ = 0.130 with a reduced frequency f* = 0.151 that is used by the cruising aquatic animals. The foil oscillation with negative power enhances the growth of vortices while that with positive power weakens the growth.
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ALAM, Md. Mahbub, Li-Ming CHAO, Shafiqur REHMAN, Chunning JI, Hanfeng WANG, 2021. Energy harvesting from passive oscillation of inverted foil. In: Physics of Fluids. AIP Publishing. 2021, 33(7), 075111. ISSN 1070-6631. eISSN 1089-7666. Available under: doi: 10.1063/5.0056567BibTex
@article{Alam2021Energ-66317, year={2021}, doi={10.1063/5.0056567}, title={Energy harvesting from passive oscillation of inverted foil}, number={7}, volume={33}, issn={1070-6631}, journal={Physics of Fluids}, author={Alam, Md. Mahbub and Chao, Li-Ming and Rehman, Shafiqur and Ji, Chunning and Wang, Hanfeng}, note={Article Number: 075111} }
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