Synthetic jet actuators (SJA) are one of the newly developed actuators that have demonstrated its great potentials in active flow applications, particularly in closed-loop flow controls. The SJA contains a piezoelectric membrane in a cavity, which vibrates and generates a periodic jet at the exit of the cavity through an orifice that is mounted flush with the solid wall of the flow field. In order to design the feedback control laws, it is crucial to be able to quantitatively capture the dynamics of SJA. In this paper, the dynamics of SJAs with six different orifice sizes are experimentally investigated. A synthesis using system identification for the purpose of constructing mathematical models of these zero mass-flux actuators is offered. The experimental study includes two output parameters, the acoustic sound pressure generated by the SJA and the mechanical membrane vibration of the SJA. State-space models for these outputs (sound pressure and mechanical vibration) are developed as a function of orifice size. These results form a foundation for future intelligent design of SJA.

Volume Subject Area:
Dynamic Systems and Control
Topics:
Actuators, Dynamics (Mechanics), Cavities, Design, Flow (Dynamics), Membranes, Sound pressure, Vibration, Acoustics, Feedback, Flow control
1.
Allan, B. G., Juang, Jer-Nan, Raney, D. L., Seifert, A, Pack, L. G. and Brown, D. E., 2000, “Closed-loop Separation Control Using Oscillatory Flow Excitation,” NASA/CR-2000-210324.
2.
Cobalt Solutions, LLC., USAF Academy, 2004, “Computational Methods for Feedback Controllers for Aerodynamics Flow Applications,” AFOSR/STTR Final Report, 29 July, 2004.
3.
Neumeier, Y., Shcherbik, D. Lubarsky E. and Zinn, B., 2003, “Active Adaptive Control of Instabilities in High Pressure Power Turbine Combustor Simulator,” AIAA 2003-1005, AIAA 41st Aerospace Sciences Meeting and Exhibit, Reno, NV, Jan.
4.
Suzuki, T. Colonius, T. and MacMartin, D. 2004, “Closed-loop Control of Vortex Shedding in a Separated Diffuser Using an Inverse Method,” AIAA 2004-577, AIAA 42nd AIAA Aerospace Sciences Meeting and Exhibit
5.
Weigl
H. J.
,
Paduano
J. D.
,
Frechette
L. G.
,
Epstein
E. M.
,
Bright
M. M.
,
Strazisar
A. J.
,
1998
, “
Active Stabilization of Rotating Stall and Surge in a Transonic Single-Stage Axial Compressor
,”
ASME J. of Turbomachinery
, Vol.
120
, pp.
625
–
636
, October
6.
Scott G. Anders, William L. Sellers III, and Anthony E. Washburn, 2004, “Active Flow Control Activities at NASA Langley,” AIAA-2004-2623, 2nd AIAA Flow Control Conference, June 28–July 1, 2004, Portland, OR
7.
Othon
K. K
,
Jeonghwan
Ko
,
Andrew
J. J
, “
Reduced Order Nonlinear Navier Stokes Models for Synthetic Jets
,”
Journal of Fluids Engineering
, Vol.
124
, No.
2
, pp.
433
–
443
, June
2002
8.
Aravind Pillarisetti and Louis N. Cattafesta III, “Adaptive Identification of Fluid-Dynamic Systems,” AIAA 2001-2978, 31st AIAA Fluid Dynamics Conference & Exhibit 11–14 June 2001, Anaheim, CA
9.
Rathnasingham R. and Breuer K.S., “System identification and active control of a turbulent Boundary Layer,” AIAA-97-1793, June 1997.
10.
Juang J.-N., Applied System Identification, PRT Prentice Hall, Inc., Englewood Cliffs, New Jersey, 1994.
This content is only available via PDF.
Copyright © 2005
 by ASME
You do not currently have access to this content.