M.S. Thesis Presentation by David A. Tamburello
Wednesday, July 2, 2003

(Dr. James Hartley, advisor)

"Parametric Analysis of the Synthetic Air Jet Using Numerical Simulations"

Abstract

The study described here involved the parametric study based on the synthetic air jet experiment performed by Vukasinovic and Glezer (2001). Numerical simulations for the synthetic air jet were performed using the FLUENT 5.4 CFD analysis software. The five parametric studies examined the effects of changing the synthetic jet actuator diaphragm amplitude, the target height, the cavity spacer height, the orifice diameter, and the orifice thickness. Centerline velocity distributions, axial velocity profiles, and centerline pressure distributions were compared for each parametric study to establish each parameter’s effect on the synthetic jet’s flow field performance.

The centerline velocities averaged over the full oscillation cycle increase in magnitude with increasing actuator diaphragm amplitude, increasing target height, decreasing orifice diameter, and decreasing orifice thickness. The axial velocity profiles widen with decreasing actuator diaphragm amplitude, decreasing target height, and increasing orifice thickness. The centerline pressures averaged over the full oscillation cycle change very little throughout the flow field between the orifice plate and the target plate, regardless of what parameter is changed. Increasing the actuator diaphragm amplitude or decreasing the orifice diameter produces increased magnitudes in full oscillation cycle averaged centerline pressure near the target plate. To produce the maximum average centerline velocity magnitude throughout the flow field, the optimum values of actuator diaphragm amplitude, target height, cavity spacer height, orifice diameter, and orifice thickness would be 461 ?m, 101.6 mm, 3.18 mm, 3.18 mm, and 3.18 mm, respectively.