Articles producció científica> Enginyeria Mecànica

Pitching foil propulsion performance decays near the free surface

  • Datos identificativos

    Identificador: imarina:9292124
    Autores:
    Huera-Huarte, Francisco J
    Resumen:
    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.
  • Otros:

    Autor según el artículo: Huera-Huarte, Francisco J
    Departamento: Enginyeria Mecànica
    Autor/es de la URV: Huera Huarte, Francisco Javier
    Palabras clave: Vortex wakes Vortex formation Swimming Pitching foils Free surface Bio-inspired propulsion vortex wakes thrust swimming pitching foils mechanics free surface dynamics
    Resumen: 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.
    Áreas temáticas: Water resources Oceanography Ocean engineering Interdisciplinar Environmental engineering Engineering, ocean Engineering, marine Engineering, civil Engenharias iv Engenharias iii Engenharias i Ciências ambientais Biodiversidade
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: francisco.huera@urv.cat
    Identificador del autor: 0000-0002-5447-3183
    Fecha de alta del registro: 2024-10-12
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S0029801823000471
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Ocean Engineering. 272 113663-
    Referencia de l'ítem segons les normes APA: Huera-Huarte, Francisco J (2023). Pitching foil propulsion performance decays near the free surface. Ocean Engineering, 272(), 113663-. DOI: 10.1016/j.oceaneng.2023.113663
    DOI del artículo: 10.1016/j.oceaneng.2023.113663
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2023
    Tipo de publicación: Journal Publications
  • Palabras clave:

    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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