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1045389X06075658v1
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First published on May 30, 2007, doi:10.1177/1045389X06075658

Journal of Intelligent Material Systems and Structures 2007;18:1175.

A more recent version of this article appeared on November 1, 2007
 © 2007 SAGE Publications

Article

Piezoelectric Actuators as Synthetic Jets: Cavity Dimension Effects

Poorna Mane1, Karla Mossi1*, Ali Rostami1, Robert G. Bryant2, Nicolas Castro1

1 Virginia Commonwealth University, 601 West Main Street, P.O. Box 843015 Richmond, Virginia 23284-3015, USA
2 NASA Langley Research Center, 6 West Taylor St., B1293A Mail Stop 226, Hampton, VA 23681, USA

* To whom correspondence should be addressed.


  Abstract

Effects of dimensional cavity parameters, height, and orifice diameter, on synthetic jet peak velocities are investigated numerically and experimentally, utilizing two piezoelectric composite diaphragms, Bimorph and Thunder®. The system is modeled using a RNG {kappa}-{epsilon} model with a mesh generated using a tri-pave unstructured scheme and the diaphragms are modeled as moving boundaries. The model compares within 15% for a Bimorph but underpredicts the results for Thunder® by more than 30%. For a Bimorph, both cavity parameters are relevant with the orifice diameter having a higher effect. For Thunder® however, only orifice diameter is found to be statistically significant.

Key Words: pre-stressed piezoelectric actuators, synthetic jet, Thunder®, Bimorph.


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