A New Class of Synthetic Jet Actuators—Part I: Design, Fabrication and Bench Top Characterization

[+] Author and Article Information
J. L. Gilarranz, L. W. Traub, O. K. Rediniotis

Department of Aerospace Engineering, Texas A&M University, College Station, Texas 77843-3141

J. Fluids Eng 127(2), 367-376 (May 10, 2005) (10 pages) doi:10.1115/1.1839931 History: Received August 12, 2003; Revised February 25, 2004; Online May 10, 2005
Copyright © 2005 by ASME
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Principle of SJA driving mechanism
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Two views of the single piston SJA
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Theoretical and measured maximum velocity at the exit slot for two slot widths: (a) Slot width=0.80 mm and (b) slot width=1.60 mm
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Variation of measured maximum velocity over the length of the exit slot
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Schematic of multi-piston SJA
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Plenum cross section showing exit slot geometry: (a) Fixed slot geometry and (b) variable slot geometry
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Dependence of Cμ on frequency and slot width for U=50 m/s, incompressible assumption
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Pictures of multipiston actuator, showing motor mounting, cylinder phasing and exit slot geometry
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Fast-response stagnation probe
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Frequency response of fast-response stagnation probe
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Schematic of plenum separation walls
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Maximum exit velocity as a function of actuator frequency: (a) Comparison of hot-wire measurements and predictions using the continuity equation for incompressible flow, for all six pistons. (b) Comparison of hot-wire and fast-response stagnation probe measurements for piston #1.
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Effects of the extended plenum separation walls on the spanwise distribution of the maximum jet exit velocity, for an actuator frequency of 120 Hz
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Effect of SJA frequency and slot width on normalized SJA exit velocity
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Effect of compressibility on the jet exit parameter K
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Effect of frequency and slot width on SJA exit velocity: (a) Velocity dependence on frequency, slot width=1.2 mm, (b) maximum SJA exit velocity as a function of slot width




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