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On the efficiency of energy harvesting using vortex-induced vibrations of cables

Grouthier, Clément and Michelin, Sébastien and Bourguet, Rémi and Modarres-Sadeghi, Yahya and Langre, Emmanuel de On the efficiency of energy harvesting using vortex-induced vibrations of cables. (2014) Journal of Fluids and Structures, 49. 427-440. ISSN 0889-9746

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.jfluidstructs.2014.05.004


Many technologies based on fluid–structure interaction mechanisms are being developed to harvest energy from geophysical flows. The velocity of such flows is low, and so is their energy density. Large systems are therefore required to extract a significant amount of energy. The question of the efficiency of energy harvesting using vortex-induced vibrations (VIV) of cables is addressed in this paper, through two reference configurations: (i) a long tensioned cable with periodically-distributed harvesters and (ii) a hanging cable with a single harvester at its upper extremity. After validation against either direct numerical simulations or experiments, an appropriate reduced-order wake-oscillator model is used to perform parametric studies of the impact of the harvesting parameters on the efficiency. For both configurations, an optimal set of parameters is identified and it is shown that the maximum efficiency is close to the value reached with an elastically mounted rigid cylinder. The variability of the efficiency is studied in light of the fundamental properties of each configuration, i.e. body flexibility and gravity-induced spatial variation of the tension. In the periodically-distributed harvester configuration, it is found that the standing-wave nature of the vibration and structural mode selection plays a central role in energy extraction. In contrast, the efficiency of the hanging cable is essentially driven by the occurrence of traveling wave vibrations.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Sciencedirect website : http://www.sciencedirect.com/science/article/pii/S0889974614001005
HAL Id:hal-01166470
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > University of Massachusetts Amherst - UMASS AMHERST (USA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Ecole Polytechnique (FRANCE)
Laboratory name:
Deposited On:22 Jun 2015 15:50

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