Aeroacoustic energy harvesting using relaxor ferroelectric single crystals

Aeroacoustic energy harvesting using relaxor ferroelectric single crystals

Matthew J. Schipper, David J. Munk, Jaslyn Gray, Scott D. Moss, Nik Rajic, Caroline Hamilton-Smith, James Kirkness-Duncombe, Gareth A. Vio, Crispin Szydzik, Arnan Mitchell

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Abstract. This paper reports on the use of relaxor ferroelectric single crystal for harvesting aeroacoustic energy from the floor of a structural cavity. In particular, this work examines the optimisation of the single crystal transducer geometry to maximise the energy harvested. The transducers used are 0.175 mm thick [011] poled Mn-Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3 (or Mn-PMN-PZT) single crystal fibre composite (or SFC). In this study, the SFCs are bonded to the floor of an experimental cavity within a low-speed wind-tunnel with an airspeed of ~ 60 m/s. Air flowing over the cavity creates an oscillatory pressure cycle that is used as a source of harvestable energy. Detailed multiphysics modelling and parametric optimisation were performed, with model predictions well matched to wind-tunnel experimental results. In particular it is shown that, due to the cavity geometry, an SFC mounted on the cavity floor perpendicular to the wind-tunnel flow produces ~4 times more power than an SFC mounted parallel.

Aeroacoustic, Structural Cavity, Energy Harvesting, Relaxor Ferroelectric Single Crystal, Structural Health Monitoring

Published online 3/30/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Matthew J. Schipper, David J. Munk, Jaslyn Gray, Scott D. Moss, Nik Rajic, Caroline Hamilton-Smith, James Kirkness-Duncombe, Gareth A. Vio, Crispin Szydzik, Arnan Mitchell, Aeroacoustic energy harvesting using relaxor ferroelectric single crystals, Materials Research Proceedings, Vol. 27, pp 95-102, 2023


The article was published as article 12 of the book Structural Health Monitoring

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