High Propulsive Efficiency By A System Of
Oscillating Wing Tails
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
Keywords
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