WIT Press


High Propulsive Efficiency By A System Of Oscillating Wing Tails

Price

Free (open access)

Paper DOI

10.2495/CMEM990161

Volume

22

Pages

10

Published

1999

Size

947 kb

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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