An overview of simulation, modeling, and active control of flow/acoustic resonance in open cavities

Creators: Colonius, Tim

Abstract

An overview of some recent advances in simulation, modeling, and control of flow/acoustic resonance in flows over open cavities is provided. A wide variety of experiments utilizing differing actuator concepts, with both open and closed-loop control, have shown that significant attenuation of tones and broadband noise is possible. These are discussed in connection with recent advances in theoretical modeling and numerical simulation. Such work may ultimately provide accurate low-order models of cavity resonance that are suitable for robust and effective control over a wide range of flow conditions. Several areas that will require further advances in our understanding of the flow physics are highlighted.

Additional Information

© 2001 by the authors. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission. Published Online: 22 Aug 2012. I am grateful to my collaborators at Caltech, Mr. Clancy Rowley, Dr. Amit Basu, and Prof. Richard Murray, for their contributions to the cavity flow project. Thanks are due to Clancy as well for reading a draft of this report. I have also benefited from numerous discussions on cavity acoustics with A. Cain,M. Gharib, A. Roshko, D. Williams. The support by AFOSR under grant F49620-98-1-0095 with technical monitor Dr. Thomas Beutner is gratefully acknowledged.

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