Active control of boundary-layer instabilities - Use of sensors and spectral controller
- 1 August 1995
- journal article
- Published by American Institute of Aeronautics and Astronautics (AIAA) in AIAA Journal
- Vol. 33 (8) , 1521-1523
- https://doi.org/10.2514/3.12930
Abstract
This study focuses on the suppression of boundary-layer instability growth using an automated active-control technique. Based on the wave-cancellation assumption, the evolution and automated control of spatially growing two-dimensional disturbances in a flat-plate boundary layer are computed. The nonlinear computations consist of the integration of the sensors, actuators, and controller as follows: the sensors will record the unsteady pressure or shear on the wall; the spectral analyzer (controller) will analyze the sensor data and prescribe a rational output signal; the actuator will use this signal to control the disturbance growth and stabilize the instabilities with the otherwise laminar boundary layer.Keywords
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