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Numerical Investigation of the Geometrical Effect on Flow-Induced Vibration Performance of Pivoted Bodies

Author

Listed:
  • Hamid Arionfard

    (Centre for Industrial Mechanics, Southern Denmark University, 6400 Sonderborg, Denmark)

  • Sina Mohammadi

    (Schmid College of Science and Technology, Chapman University, Orange, CA 92866, USA)

Abstract

In this study, the Flow-Induced Vibration (FIV) of pivoted cylinders (at a distance) is numerically investigated as a potential source of energy harvesting. In particular, we investigate the effect of pivot point placement, arm length, and natural frequency on the FIV performance of six different cross sections in the Reynolds number of around 1000. All sections have similar mass, area, and moment of inertia to eliminate non-geometrical effects on the performance. Classical studies show that the synchronization phenomenon (lock-in) occurs when the vortex formation frequency is close enough to the body’s natural frequency. Due to the configuration of the cylinder in this research (pivoted eccentrically), the natural frequency is also a function of the flow velocity as well as the geometrical specifications of the system. The simulation is done for the arm lengths between −3D and +3D for all cross sections. Results show that maximum output power is principally influenced more by the pivot location than the arm length. Although the box cross section has a higher amplitude of vibration, the circular cross section has the highest efficiency followed by the egg shape.

Suggested Citation

  • Hamid Arionfard & Sina Mohammadi, 2021. "Numerical Investigation of the Geometrical Effect on Flow-Induced Vibration Performance of Pivoted Bodies," Energies, MDPI, vol. 14(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:4:p:1128-:d:502924
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    References listed on IDEAS

    as
    1. Chowdhury, Abdullah Mobin & Akimoto, Hiromichi & Hara, Yutaka, 2016. "Comparative CFD analysis of Vertical Axis Wind Turbine in upright and tilted configuration," Renewable Energy, Elsevier, vol. 85(C), pages 327-337.
    2. Arionfard, Hamid & Nishi, Yoshiki, 2019. "Experimental investigation on the performance of a double-cylinder flow-induced vibration (FIV) energy converter," Renewable Energy, Elsevier, vol. 134(C), pages 267-275.
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