Effect of aspect ratio on hydrokinetic energy harnessing using cylinders in VIV

Aytekin Duranay, Omer Kemal Kinaci*, Michael M. Bernitsas

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: ???type-name???Makalebilirkişi

5 Atıf (Scopus)

Özet

Smooth, rigid, circular cylinders on elastic support in flow perpendicular to their axis undergo vortex-induced vibrations (VIV) over a broad range of velocities. VIV converts hydrokinetic energy to mechanical in the oscillating cylinder. Tip-flow introduces three dimensional effects reducing the effective length of the cylinder which provides the transverse lift force to induce oscillations and consequently the energy in the oscillator. In this study, we investigate experimentally the effect of the cylinder aspect ratio on hydrokinetic energy harnessing. Experiments are conducted in the Reynolds number range 15,000 < Re < 80,000 falling in two different flow regimes: TrSL2 (Transition Shear Layer 2: 1000 < Re < 40,000) and TrSL3 (40,000 < Re < 300,000). Converted power and maximum system efficiencies are calculated from experiments conducted in the recirculation channel of the Flow Induced Motions Laboratory, Istanbul Technical University (ITU FIMLab). It was found that the end-zones of the cylinder, which do not induce lift due to tip flow, are more dominant in lower aspect ratio cylinders. More power can be captured from TrSL3 flows due to higher shear-flow momentum. Higher efficiency in power conversion is achieved in TrSL2.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)217-232
Sayfa sayısı16
DergiJournal of Ocean Engineering and Marine Energy
Hacim8
Basın numarası2
DOI'lar
Yayın durumuYayınlandı - May 2022

Bibliyografik not

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

Finansman

This study was supported by the Research Fund of Istanbul Technical University (Project no.: 41970). Bernitsas’ effort was supported by Cooperative Agreement No. DE-EE0006780 between Vortex Hydro Energy, Inc. and the U.S. Department of Energy. The MRELab of the University of Michigan is a subcontractor through Vortex Hydro Energy. Dr. Michael Bernitsas is the CTO and shareholder of Vortex Hydro Energy, Inc. This study was supported by the Research Fund of Istanbul Technical University (Project no.: 41970). Bernitsas’ effort was supported by Cooperative Agreement No. DE-EE0006780 between Vortex Hydro Energy, Inc. and the U.S. Department of Energy. The MRELab of the University of Michigan is a subcontractor through Vortex Hydro Energy. Dr. Michael Bernitsas is the CTO and shareholder of Vortex Hydro Energy, Inc.

FinansörlerFinansör numarası
CTO
Vortex Hydro Energy
Vortex Hydro Energy, Inc.
U.S. Department of Energy
University of Michigan
Istanbul Teknik Üniversitesi41970, DE-EE0006780

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