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Proceedings Paper

Piezoelectric actuators for fluid-flow control
Author(s): Louis N. Cattafesta; Sanjay Garg; Anthony E. Washburn
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Paper Abstract

The characteristics of cantilever piezoelectric actuators are investigated both theoretically and experimentally. The type of actuators considered consist of a single sheet of piezoceramic material bounded to a shim--termed a `unimorph' design. A theoretical model, based on beam theory, is developed to predict the static and dynamic behavior of the actuator. The model predictions compare favorably to measurements of the actuator transfer function. A sample application to noise reduction of flow-induced cavity oscillations at low subsonic speeds is described. Use of the actuators in an open-loop control system resulted in 18 and 25 dB attenuation in the broadband and primary tone sound pressure levels, respectively.

Paper Details

Date Published: 23 May 1997
PDF: 11 pages
Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); doi: 10.1117/12.274658
Show Author Affiliations
Louis N. Cattafesta, High Technology Corp. (United States)
Sanjay Garg, High Technology Corp. (United States)
Anthony E. Washburn, High Technology Corp. (United States)


Published in SPIE Proceedings Vol. 3044:
Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies
Janet M. Sater, Editor(s)

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