| Type of Document |
Master's Thesis |
| Author |
Walker, William Paul
|
| Author's Email Address |
wiwalker@vt.edu |
| URN |
etd-08182009-141222 |
| Title |
Unsteady Aerodynamics of Deformable Thin Airfoils |
| Degree |
Master of Science |
| Department |
Aerospace and Ocean Engineering |
| Advisory Committee |
| Advisor Name |
Title |
| Patil, Mayuresh J. |
Committee Chair |
| Canfield, Robert A. |
Committee Member |
| Devenport, William J. |
Committee Member |
|
| Keywords |
- Unsteady Aerodynamics
- Deformable Airfoils
|
| Date of Defense |
2009-08-05 |
| Availability |
unrestricted |
Abstract
Unsteady aerodynamic theories are essential in the analysis of bird and insect flight. The study of these types of locomotion is vital in the development of flapping wing aircraft. This paper uses potential flow aerodynamics to extend the unsteady aerodynamic theory of Theodorsen and Garrick (which is restricted to rigid airfoil motion) to deformable thin airfoils. Frequency-domain lift, pitching moment and thrust expressions are derived for an airfoil undergoing harmonic oscillations and deformation in the form of Chebychev polynomials. The results are validated against the time-domain unsteady aerodynamic theory of Peters. A case study is presented which analyzes several combinations of airfoil motion at different phases and identifies various possibilities for thrust generation using a deformable airfoil.
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| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
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| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
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Walker_Thesis_final_revised.pdf |
456.03 Kb |
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00:01:05 |
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