Dynamic response of a flapping foil with a non-sinusoidal kinematic motion

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

4 Citations (Scopus)

Abstract

A flapping foil, which is free to move horizontally propelled by a nonsinusoidal plunging motion, is numerically simulated. The hydrodynamics of foil is investigated by various kinematic and structural dynamic parameters, such as the mass ratio between foil and fluid, the plunging frequency of foil and different non-sinusoidal plunging profile via a parameter β. It is found that the foil at rest initially, could move forward or backward and eventually reaches a steady state with an oscillating constant horizontal velocity, dependent on the plunging frequency and mass ratio. At the given flapping frequency and amplitude, the foil thrust force is enhanced with nonsinusoidal motion compared to the counterpart of sinusoids. The foil with small mass ratio approaches faster to the final steady state than large mass ratio.
Original languageEnglish
Title of host publicationThe Proceedings of The Twenty-first (2011) International Offshore and Polar Engineering Conference
Place of PublicationCupertino, California
Pages235-245
Number of pages7
Volume2
Publication statusPublished - 19 Jun 2011
Event21st International Offshore and Polar Engineering Conference, ISOPE-2011 - Maui, United States
Duration: 19 Jun 201124 Jun 2011

Conference

Conference21st International Offshore and Polar Engineering Conference, ISOPE-2011
Abbreviated titleISOPE-2011
CountryUnited States
CityMaui
Period19/06/1124/06/11

Keywords

  • flapping
  • foil
  • hydrodynamics
  • kinematic
  • motion
  • non-sinusoidal
  • self-propelled
  • flapping foil
  • flapping frequency
  • horizontal velocity
  • mass ratio
  • steady state
  • thrust forces
  • dynamic response
  • kinematics
  • structural dynamics
  • airfoils

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