23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-R68

INFLUENCE OF ACOUSTIC EXCITATION ON AIRFOIL PERFORMANCE AT LOW REYNOLDS NUMBERS

S. Yarusevych (1), J. G. Kawall (2), P. Sullivan (1)
(1) University of Toronto, Canada; (2) Ryerson University

Keywords: airfoil, separation, vortex shedding, low reynolds number, wake, external acoustic excitation

The wake structure, vortex shedding characteristics and boundary-layer separation of a NACA 0025 airfoil and the effect of external acoustic excitations on airfoil performance were studied experimentally. Wind tunnel experiments were carried out for three Reynolds numbers and three angles of attack. Velocities were measured with hot-wires. Spectral analysis of these data was used in conjunction with complementary surface flow visualization to diagnose the performance of the airfoil at low Reynolds numbers.

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