Effect of incident flow unsteadiness on the wake behind a bluff body
V.N. Zinoviev, V.A. Lebiga, D.S. Mironov, A.Yu. Pak
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: subsonic flow, two-dimensional flow, velocity oscillations, bluff body, localized disturbance
Abstract
The paper describes the results of studying the influence of a free-stream disturbance localized in time and space on the structure of the wake behind a symmetric droplet-shaped airfoil in the range of angles of attack from -20° to +20°. It is demonstrated that the existence of such a disturbance leads to suppression of vortex formation at certain angles of attack. Ranges of angles of attack in which the wake structure remains unchanged are found.
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