High Propulsive Efficiency By A System Of Oscillating Wing Tails
Price
Free (open access)
Transaction
Volume
22
Pages
10
Published
1999
Size
947 kb
Paper DOI
10.2495/CMEM990161
Copyright
WIT Press
Author(s)
O.K. Politis & K.A. Belibassakis
Abstract
The analysis of harmonically oscillating wing tails, considered as an unsteady propulsion system, is extended to the case of large amplitudes of oscillatory motion. Each wing undergoes a combined transverse and angular motion, at the same frequency, and in a uniform inflow. A 3-D unsteady vortex-lattice technique is applied to model the flow around the system, including leading- edge separation and dynamic-stall effects. A free-wake analysis is incorporated in order to account for the effects of non-linear wake dynamics, at high translation velocities and at increased amplitudes of oscillatory motion. Numerical results are presented vs. experimental measurements for the thrust coefficient and th
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