Autor segons l'article: Huera-Huarte, FJ
Departament: Enginyeria Mecànica
Autor/s de la URV: Huera Huarte, Francisco Javier
Paraules clau: Vortex wakes Vortex formation Swimming Pitching foils Free surface Bio-inspired propulsion vortex wakes thrust swimming pitching foils mechanics free surface dynamics
Resum: 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.
Àrees temàtiques: Water resources Oceanography Ocean engineering Interdisciplinar Environmental engineering Engineering, ocean Engineering, marine Engineering, civil Engenharias iv Engenharias iii Engenharias i Ciências ambientais Biodiversidade
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: francisco.huera@urv.cat
Identificador de l'autor: 0000-0002-5447-3183
Data d'alta del registre: 2023-12-17
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://www.sciencedirect.com/science/article/pii/S0029801823000471
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Ocean Engineering. 272
Referència de l'ítem segons les normes APA: Huera-Huarte, FJ (2023). Pitching foil propulsion performance decays near the free surface. Ocean Engineering, 272(), -. DOI: 10.1016/j.oceaneng.2023.113663
DOI de l'article: 10.1016/j.oceaneng.2023.113663
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2023
Tipus de publicació: Journal Publications
Repositori URV