RT Journal Article
T1 Analytical results for the propulsion performance of a flexible foil with prescribed pitching and heaving motions and passive small deflection
A1 Fernández-Feria, Ramón
A1 Alaminos-Quesada, Javier
K1 Vuelo
K1 Natación
AB The propulsive performance of a flexible foil with prescribed pitching and heaving motionsabout any pivot point location and passive chordwise flexural deflection is analysed withinthe framework of the linear potential flow theory and the Euler–Bernoulli beam equationusing a quartic approximation for the deflection. The amplitude of the flexural componentof the deflection and its phase, the thrust force, input power and propulsive efficiency arecomputed analytically in terms of the stiffness and mass ratio of the plate, frequency, pivotpoint location and remaining kinematic parameters. It is found that the maximum flexuraldeflection amplitude, thrust and input power are related to the first fluid–structure naturalfrequency of the system, corresponding to the deflection approximation considered. Thesame relation is observed for the propulsive efficiency when an offset drag is includedin the analytical expressions. These results, which are valid for small amplitude andsufficiently large stiffness of the foil, are compared favourably with previous related resultswhen the foil pivots about the leading edge. The configurations generating maximum thrustand efficiency enhancement by flexibility are analysed in relation to those of an otherwiseidentical rigid foil.
PB Cambridge
YR 2021
FD 2021-01-28
LK https://hdl.handle.net/10630/23993
UL https://hdl.handle.net/10630/23993
LA eng
NO Fernandez-Feria, R., & Alaminos-Quesada, J. (2021). Analytical results for the propulsion performance of a flexible foil with prescribed pitching and heaving motions and passive small deflection. Journal of Fluid Mechanics, 910, A43. doi:10.1017/jfm.2020.1015
NO Funding for open access charge: Universidad de Málaga. This research has been supported by grants from the Ministerio de Ciencia e Innovación of Spain (DPI2016-76151-C2-1-R and PID2019-104938RB-I00) and from the Junta de Andalucía, Spain (UMA18-FEDER-JA-047 and P18-FR-1532).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026