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Development and test of synthetic jet actuators based on dual transducer concept

: Schueller, M.; Wiegel, P.; Lipowski, M.; Schulze, R.; Otto, T.; Gessner, T.


Farinholt, K.M. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; American Society of Mechanical Engineers -ASME-:
Industrial and commercial applications of smart structures technologies 2014 : 11 - 12 March 2014, San Diego, California, United States
Bellingham, WA: SPIE, 2014 (Proceedings of SPIE 9059)
ISBN: 978-0-8194-9985-1
Paper 905902, 6 S.
Conference "Industrial and Commercial Applications of Smart Structures Technologies" <2014, San Diego/Calif.>
Fraunhofer ENAS ()

Synthetic Jet Actuators (SJA) are micro fluidic devices with low power and high compactness. They are used for different applications that require a directed air flow. These kind of fluidic generators require zero mass input and produces non-zero momentum output. The classic design of such an actuator consists of a membrane located on one wall of a small cavity and an orifice that is typically on the opposite side of the membrane. In the new SJA concept a Helmholtz resonator is equipped with two transducers to increase the performance of the actuator. The piezoelectric membranes generate the volumetric flow symmetrically from both sides of the chamber. A common outlet connects them to the acoustic far field. A network model [1] was used for designing and optimizing the SJA. Based on this, a doublewall actuator (DWSJA) was developed. The simulation results show that using two transducers does not fully redouble the exit velocity [2], but it still shows major improvement in comparison to conventional SJA with single transducers.