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Numerical Study Of Asymmetric Effect On A Pitching Foil

Author

Listed:
  • QING XIAO

    (Department of Naval Architecture and Marine Engineering, University of Strathclyde, Glasgow, G4 0LZ, UK)

  • WEI LIAO

    (Department of Mathematics and Statistics, Old Dominion University, 4700 Elkhorn Ave, Norfolk, VA 23529, USA)

Abstract

This study investigates numerically the effect of asymmetric sinusoidal oscillating motion on the propulsion performance of a pitching foil and attempts to gain insight in whether the low thrust generated by pure pitching could be improved by asymmetric motion. The propulsion performance and flow structure are explored by solving the unsteady Navier–Stokes equations. Computations are conducted for a range of oscillation frequency, pitching amplitude, and asymmetry. The results show that the higher asymmetry can induce the stronger reverse Von Karman vortex in the wake, which in turn leads to the increased thrust. However, the propulsion efficiency reduces as increasing asymmetry. Computed results are further adopted to shed insight into the mechanism of thrust enhancement.

Suggested Citation

  • Qing Xiao & Wei Liao, 2009. "Numerical Study Of Asymmetric Effect On A Pitching Foil," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 20(10), pages 1663-1680.
    • Handle: RePEc:wsi:ijmpcx:v:20:y:2009:i:10:n:s0129183109014667
    DOI: 10.1142/S0129183109014667
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    References listed on IDEAS

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    1. Munck, Ronaldo, 1999. "Citizenship, Participation and Democracy. Changing Dynamics in Chile and Argentina. By Lucy Taylor. New York: St. Martin's, 1998. 204p. $65.00," American Political Science Review, Cambridge University Press, vol. 93(1), pages 231-231, March.
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    Cited by:

    1. Xiao, Qing & Liao, Wei & Yang, Shuchi & Peng, Yan, 2012. "How motion trajectory affects energy extraction performance of a biomimic energy generator with an oscillating foil?," Renewable Energy, Elsevier, vol. 37(1), pages 61-75.

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