Original title: Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles
Authors: Kordík, Jozef ; Trávníček, Zdeněk
Document type: Papers
Conference/Event: Experimental Fluid Mechanics 2016, Mariánské Lázně (CZ), 20161115
Year: 2016
Language: eng
Abstract: Axisymmetric synthetic jet actuators based on a loudspeaker and on two types of flanged nozzles were tested and compared experimentally. The first type of the nozzle was a sharp-edged circular hole. The second one had a special design with fillets at inner and outer nozzle exit and with a small step in the middle of the nozzle. The function of the step was to prevent the flow reattachment during the extrusion stroke. The actuators with the two types of nozzles were operated at resonance and were compared first qualitatively using a simple phase locked flow visualization. Then the hot-wire anemometer was used to measure velocity \ndistributions along nozzle axis and velocity profiles at the nozzle exit. Comparison of the nozzles was based on evaluation of the characteristic velocity and integral quantities (volumetric, momentum, and kinetic energy fluxes). It was found out that these quantities, which were evaluated at the nozzle exit, differ substantially for both nozzles. On the other hand the velocity flow field in farther distances from the nozzle exit area did not exhibit such prominent differences.
Keywords: resonance; synthetic jet; synthetic jet actuator
Project no.: GA16-16596S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of the International conference Experimental Fluid Mechanics 2016

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0266666

Permalink: http://www.nusl.cz/ntk/nusl-262557


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Research > Institutes ASCR > Institute of Thermomechanics
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