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Performance of synthetic jet actuators based on hybrid and double-acting principles

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Abstract

The design of the discussed fluid jet actuator followed two ideas: a double-acting operation of reciprocating pumps, and a hybrid synthetic jet (HSJ) actuation. The entire actuator consists of two basic parts, namely the front (central) and rear chambers, from which fluid is displaced by the opposite sides of the same diaphragm. The actuator operates in a double-acting (antiphase) regime with air as the working fluid. The central chamber generates the standard (zero-net-mass-flux) axisymmetric synthetic jet (SJ), while the rear chamber generates system of several non-zero-net-mass-flux HSJs arranged around the central SJ. A number of variants of HSJs with different geometry were designed, manufactured and tested. Their behavior was investigated experimentally using the smoke visualization, reaction force measurement, hot-wire anemometry, and naphthalene sublimation technique. The tests confirm the efficiency of the present design.

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Authors and Affiliations

  1. Institute of Thermomechanics of the ASCR v. v. i., Dolejškova 5, 182 00, Prague, Czech Republic

    Trávníček Z., Tesař V. & Kordík J.

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  1. Trávníček Z.
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  2. Tesař V.
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  3. Kordík J.
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Additional information

Zdeněk Trávníček: He received his M.Sc. (Eng.) degree in Mechanical Engineering from the Czech Technical University (CTU) in Prague in 1985 and his Ph.D. from the same university in 1994. From 1985 to 1995, he was employed at the former National Research Institute for Machine Design (SVÚSS) in Prague Běchovice. In 1996, he joined the Institute of Thermomechanics, Academy of Sciences of the Czech Republic. Since 2004, he is the Head of the Heat/Mass Transfer Laboratory. His research interests cover experimental fluid mechanics and heat/mass transfer, passive/active thermal flow control (primarily of jets and wakes), forced convective heat/mass transfer enhancement, and impinging and synthetic jets.

Václav Tesař: He received his degree in mechanical engineering and later CSc degree (an equivalent of PhD) from CTU Prague. He was Head of the Department of Fluid Mechanics and Thermodynamics, Faculty of Mechanical Engineering CTU Prague. In 1985, he was Visiting Professor at Keio University, Yokohama, Japan and in 1992 a Visiting Professor at Northern Illinois University, DeKalb, USA. Between 1999 and 2005 he was Professor at the Department of Chemical and Process Engineering, the University of Sheffield, UK. In 2006 he joined the Institute of Thermomechanics, Academy of Sciences of the Czech Republic. His research interests are in shear flows — in particular jets and wall jets — and their applications in fluidics.

Jozef Kordík: He received his M.Sc. (Eng.) degree in Mechanical Engineering from the Czech Technical University (CTU) in Prague in 2007. From 2006 has been employed on part-time basis at the Institute of Thermomechanics, Academy of Sciences of the Czech Republic. Since 2007, he is the Ph.D. student at the CTU. His interest and subject of his Ph.D. studies are experimental investigations of unsteady flows and computer processing of complex experimental data sets.

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Trávníček, Z., Tesař, V. & Kordík, J. Performance of synthetic jet actuators based on hybrid and double-acting principles. J Vis 11, 221–229 (2008). https://doi.org/10.1007/BF03181710

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  • DOI: https://doi.org/10.1007/BF03181710

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