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Energetic efficiencies of synthetic and hybrid synthetic jet actuators driven by electrodynamic transducers
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SYSNO ASEP 0451240 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Energetic efficiencies of synthetic and hybrid synthetic jet actuators driven by electrodynamic transducers Author(s) Kordík, Jozef (UT-L) RID
Trávníček, Zdeněk (UT-L) RID, ORCID
Pavelka, Miroslav (UT-L)Number of authors 3 Source Title Experimental Thermal and Fluid Science. - : Elsevier - ISSN 0894-1777
Roč. 69, December (2015), s. 119-126Number of pages 8 s. Publication form Print - P Language eng - English Country US - United States Keywords synthetic jet ; hybrid synthetic jet ; energetic efficiency Subject RIV BK - Fluid Dynamics R&D Projects GA14-08888S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000362859200012 EID SCOPUS 84940105505 DOI 10.1016/j.expthermflusci.2015.08.005 Annotation The paper investigates synthetic and hybrid synthetic jet actuators that are based on similar geometries. The actuators are supplied by a harmonic power input and are operated close to the first resonance frequency. An energetic efficiency is applied. The maximal outlet characteristic velocities and efficiencies of both actuators are studied as functions of the input real power. Theoretical approximations of these functions were derived for the synthetic jet actuator and successfully compared with experimental hot-wire results. The paper demonstrates a usefulness of the applied definition of the energetic efficiency. Moreover, the advantages of the hybrid synthetic jet actuator were quantified. The hybrid synthetic jet actuator achieves a 15-23% increase in the velocities and a 41-48% increase in the energetic efficiency, both in comparison with the ordinary synthetic jet actuator working at the same input real power. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2016
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