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 language | English |
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Title of host publication | The Proceedings of The Twenty-first (2011) International Offshore and Polar Engineering Conference |
Place of Publication | Cupertino, California |
Pages | 235-245 |
Number of pages | 7 |
Volume | 2 |
Publication status | Published - 19 Jun 2011 |
Event | 21st International Offshore and Polar Engineering Conference, ISOPE-2011 - Maui, United States Duration: 19 Jun 2011 → 24 Jun 2011 |
Conference
Conference | 21st International Offshore and Polar Engineering Conference, ISOPE-2011 |
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Abbreviated title | ISOPE-2011 |
Country/Territory | United States |
City | Maui |
Period | 19/06/11 → 24/06/11 |
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