Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9921
Title: Active control of flow-induced acoustic resonance through surface perturbation
Authors: Lu, ZB
Cheng, L 
Issue Date: 2012
Source: AIAA Journal, 2012, v. 50, no. 11, p. 2566-2573 How to cite?
Journal: AIAA Journal 
Abstract: A surface perturbation technique was applied to control the flow-induced acoustic resonance inside downstream cavities. The technique made use of piezoceramic actuators embedded on the surface of an upstream test model in a crossflow to generate a controllable motion to alter vortex formation, as well as the subsequent acoustic resonance. Experiments were conducted using various configurations. It was observed that the flow-induced acoustic resonance could be effectively reduced after applying a surface perturbation technique. This was caused not only by an impairment of the vortex-shedding strength but also by a shift in the shedding frequency resulting from the control action. The vortex-strength abatement mechanism was discussed, and the estimation of the frequency-shift phenomenon as well as its effect on the impairment of acoustic resonance was experimentally assessed.
URI: http://hdl.handle.net/10397/9921
ISSN: 0001-1452
DOI: 10.2514/1.J051748
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