Articles producció científica> Enginyeria Mecànica

Pitching foil propulsion performance decays near the free surface

  • Identification data

    Identifier: imarina:9292124
  • Authors:

    Huera-Huarte, FJ
  • Others:

    Author, as appears in the article.: Huera-Huarte, FJ
    Department: Enginyeria Mecànica
    URV's Author/s: Huera Huarte, Francisco Javier
    Keywords: Vortex wakes Vortex formation Swimming Pitching foils Free surface Bio-inspired propulsion vortex wakes thrust swimming pitching foils mechanics free surface dynamics
    Abstract: A series of experiments reveal the non-linear relationship between the propulsive performance of a pitching foil and its distance to the free surface. An especially designed robotic device allowed to sinusoidally actuate a symmetric NACA 0021 profile, with its shaft being perpendicular to the free surface, at different separations from it, whilst measuring hydrodynamic loads, power and efficiency. Digital Particle Image Velocimetry (DPIV) was used to study the flow structures around the flapping system, to better understand the performance trends observed. Efficiency dropped more than a 40% when the foil was placed at a distance of approximately 5 to 10% of the span of the system, as a consequence of a large decrease in thrust and a large increase in power, both clearly linked to wake formation.
    Thematic Areas: Water resources Oceanography Ocean engineering Interdisciplinar Environmental engineering Engineering, ocean Engineering, marine Engineering, civil Engenharias iv Engenharias iii Engenharias i Ciências ambientais Biodiversidade
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: francisco.huera@urv.cat
    Author identifier: 0000-0002-5447-3183
    Record's date: 2024-08-03
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S0029801823000471
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Ocean Engineering. 272
    APA: Huera-Huarte, FJ (2023). Pitching foil propulsion performance decays near the free surface. Ocean Engineering, 272(), -. DOI: 10.1016/j.oceaneng.2023.113663
    Article's DOI: 10.1016/j.oceaneng.2023.113663
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2023
    Publication Type: Journal Publications
  • Keywords:

    Engineering, Civil,Engineering, Marine,Engineering, Ocean,Environmental Engineering,Ocean Engineering,Oceanography,Water Resources
    Vortex wakes
    Vortex formation
    Swimming
    Pitching foils
    Free surface
    Bio-inspired propulsion
    vortex wakes
    thrust
    swimming
    pitching foils
    mechanics
    free surface
    dynamics
    Water resources
    Oceanography
    Ocean engineering
    Interdisciplinar
    Environmental engineering
    Engineering, ocean
    Engineering, marine
    Engineering, civil
    Engenharias iv
    Engenharias iii
    Engenharias i
    Ciências ambientais
    Biodiversidade
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