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Energetics and optimum motion of oscillating lifting surfaces of finite spanIn certain modes of animal propulsion in nature, such as bird flight and fish swimming, the efficiency compared to man-made vehicles is very high. In such cases, wing and tail motions are typically associated with relatively high Reynolds numbers, where viscous effects are confined to a thin boundary layer at the surface and a thin trailing wake. The propulsive forces, which are generated primarily by the inertial forces, can be calculated from potential-flow theory using linearized unsteady-wing theory (for small-amplitude oscillations). In the present study, a recently developed linearized, low-frequency, unsteady lifting-line theory is employed to calculate the (sectional and total) energetic quantities and optimum motion of an oscillating wing of finite span.
Document ID
19860040346
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ahmadi, A. R.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Widnall, S. E.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 162
ISSN: 0022-1120
Subject Category
Aerodynamics
Accession Number
86A25084
Funding Number(s)
CONTRACT_GRANT: NGR-22-009-818
Distribution Limits
Public
Copyright
Other

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