Control of random disturbances in a boundary layer
Conference Paper
Overview
Overview
abstract
American Institute of Aeronautics and Astronautics, Inc., 1989. All rights reserved. An experiment was performed to determine the applicability of broad-band disturbance-wave cancellation using wave-superposition principles. Conducted in the Arizona State University Unsteady Wind Tunnel, the experiments examined broad-frequency-band excitation for Blasius boundary-layer flow over a flat plate. In order to fix amplitude and frequency content of the disturbances, a vibrating ribbon was used to excite the boundary layer. The method of introducing the canceling disturbance was also via a vibrating ribbon. With an active feedback loop on the computer, broad-band T-S wave amplitudes were reduced by an order of magnitude thus demonstrating the feasibility of this technique.
