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Flutter-Mill: a New Energy-Harvesting Device

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5. Concluding remarks<br />

A new energy-harvesting concept of utilizing the flutter motions of cantilevered<br />

flexible plates in axial flow to generate electric power, namely the flutter-mill, is<br />

proposed in this paper. The dynamics of the system and the energy transfer between<br />

the plate and the surrounding fluid flow have been studied. Based on the theoretical<br />

work, the key design parameters are determined. Without a comprehensive<br />

optimization process at the present stage of conceptual design, the performance of<br />

the flutter-mill is preliminarily evaluated and compared to a real conventional wind<br />

turbine. It has been shown that the proposed design of flutter‐mill, with the<br />

distinguishing advantages of simple structure and compact size, is very promising for<br />

generation of electrical power.<br />

Acknowledge<br />

The leading author gratefully acknowledges the support by a Natural Sciences and<br />

Engineering Research Council of Canada (NSERC) post-doctoral fellowship.<br />

Reference<br />

[1] L. Tang, M. P. Païdoussis, “On the instability and the post-critical behavior of<br />

two-dimensional cantilevered flexible plates in axial flow,” Journal of Sound and<br />

Vibration 305 (2007) 97−115.<br />

[2] D. A. Adamko, J. D. DeLaurier, “An experimental study of an oscillating-wing<br />

windmill,” Proceedings of the Second Canadian Workshop on Wind Engineering<br />

(1978) 64−66.<br />

[3] W. McKinney, J. D. DeLaurier, “The wingmill: An oscillating-wing windmill,”<br />

Journal of <strong>Energy</strong> 5 (1981) 109−115.<br />

[4] K. H. Ly, V. A. L. Chasteau, “Experiments on an oscillating-wing aerofoil and<br />

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[5] J. F. Manwell, J. G. McGowan, A. L. Rogers, “Wind <strong>Energy</strong> Explained: Theory,<br />

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[6] K. D. Jones, M. F. Platzer, “Oscillating-wing power generator,” Proceedings of<br />

ASME/JSME-FEDSM99 No. 7050.<br />

[7] M. Matsumoto, Y. Honmachi, K. Okubo, Y. Ito, “Fundamental study on the<br />

efficiency of power generation system by use of the flutter instability,”<br />

Proceedings of PVP2006-ICPVT-11 No. 93773.<br />

[8] A. Lee, “Extraction of energy from flowing fluids,” Canadian Patent No. 2266632.<br />

[9] T. Burton, D. Sharpe, N. Jenkins, E. Bossanyi, “Wind <strong>Energy</strong>: Handbook,” John<br />

Wiley & Sons, Inc., <strong>New</strong> York, 2001.<br />

[10] L. Tang, “The Dynamics of Two-Dimensional Cantilevered Flexible Plates in<br />

Axial Flow and a <strong>New</strong> <strong>Energy</strong>-<strong>Harvesting</strong> Concept,” PhD Thesis, McGill<br />

University, Montréal, Québec (November 2007).

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