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This version was published on November 1, 2007
Journal of Intelligent Material Systems and Structures, Vol. 18, No. 11, 1175-1190 (2007)
DOI: 10.1177/1045389X06075658
© 2007 SAGE Publications

Piezoelectric Actuators as Synthetic Jets: Cavity Dimension Effects

Poorna Mane

Virginia Commonwealth University, 601 West Main Street, P.O. Box 843015 Richmond, Virginia 23284-3015, USA

Karla Mossi

Virginia Commonwealth University, 601 West Main Street, P.O. Box 843015 Richmond, Virginia 23284-3015, USA, kmmossi{at}vcu.edu

Ali Rostami

Virginia Commonwealth University, 601 West Main Street, P.O. Box 843015 Richmond, Virginia 23284-3015, USA

Robert Bryant

NASA Langley Research Center, 6 West Taylor St., B1293A Mail Stop 226, Hampton, VA 23681, USA

Nicolas Castro

Virginia Commonwealth University, 601 West Main Street, P.O. Box 843015 Richmond, Virginia 23284-3015, USA

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}—{varepsilon} 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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