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Hydrodynamic Efficiency Analysis of a Flexible Hydrofoil Oscillating in a Moderate Reynolds Number Fluid Flow

Author

Listed:
  • Paul Brousseau

    (Cherbourg University Laboratory of Applied Sciences LUSAC, University of Caen Normandy, 60 Rue Max-Pol Fouchet, 50130 Cherbourg-Octeville, France)

  • Mustapha Benaouicha

    (Cherbourg University Laboratory of Applied Sciences LUSAC, University of Caen Normandy, 60 Rue Max-Pol Fouchet, 50130 Cherbourg-Octeville, France
    Segula Technologies, Research and Innovation Unit in Naval and Energy Engineering, 9 Avenue Edouard Belin, 92500 Rueil-Malmaison, France)

  • Sylvain Guillou

    (Cherbourg University Laboratory of Applied Sciences LUSAC, University of Caen Normandy, 60 Rue Max-Pol Fouchet, 50130 Cherbourg-Octeville, France)

Abstract

The paper focuses on the study of a semi-activated system, based on a combination of two movements of forced pitching and free-heaving motion. Therefore, quantifying with accuracy the hydrodynamic forces applied on the hydrofoil seems to be crucial. This is investigated throughout a numerical analysis of the hydrofoil dynamics. The deformable structure is oscillating in a low-Reynolds number flow. In this study, a hydrofoil animated by a combined forced pitching and heaving movements is considered. Various materials of the hydrofoil structure are studied, from the rigid material to a more flexible one. A partitioned implicit coupling approach is applied in order to consider the Fluid-Structure Interaction (FSI) effects, while the Navier–Stokes equations are solved using the Arbitrary Lagrangian–Eulerian (ALE) method. Both the viscous incompressible Navier–Stokes equations and the elasticity equation are solved using finite volume method. The study is based on the analysis of the hydrodynamic loads acting on the structure. Therefore, the induced dynamics and the power coefficient of the structure are investigated. It is shown that the flexibility of the hydrofoil has an effect on its hydrodynamic behavior. Indeed it increases the load fluctuations and the horizontal mean force component. Furthermore, the unsteady vortices around the hydrofoil are highly impacted by its deformations. Finally, the structure deformations mostly improve the device energy efficiency.

Suggested Citation

  • Paul Brousseau & Mustapha Benaouicha & Sylvain Guillou, 2021. "Hydrodynamic Efficiency Analysis of a Flexible Hydrofoil Oscillating in a Moderate Reynolds Number Fluid Flow," Energies, MDPI, vol. 14(14), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4370-:d:597695
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    References listed on IDEAS

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    1. Zeiner-Gundersen, Dag Herman, 2015. "A novel flexible foil vertical axis turbine for river, ocean, and tidal applications," Applied Energy, Elsevier, vol. 151(C), pages 60-66.
    2. Stefan Hoerner & Iring Kösters & Laure Vignal & Olivier Cleynen & Shokoofeh Abbaszadeh & Thierry Maître & Dominique Thévenin, 2021. "Cross-Flow Tidal Turbines with Highly Flexible Blades—Experimental Flow Field Investigations at Strong Fluid–Structure Interactions," Energies, MDPI, vol. 14(4), pages 1-17, February.
    3. Pierre-Luc Delafin & François Deniset & Jacques André Astolfi & Frédéric Hauville, 2021. "Performance Improvement of a Darrieus Tidal Turbine with Active Variable Pitch," Energies, MDPI, vol. 14(3), pages 1-18, January.
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    Cited by:

    1. Sylvain S. Guillou & Eric Bibeau, 2023. "Tidal Turbines," Energies, MDPI, vol. 16(7), pages 1-5, April.

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