Název: Comparison of synthetic jet actuators based on sharp-edged and round-edged nozzles
Autoři: Kordík, Jozef ; Trávníček, Zdeněk
Typ dokumentu: Příspěvky z konference
Konference/Akce: Experimental Fluid Mechanics 2016, Mariánské Lázně (CZ), 20161115
Rok: 2016
Jazyk: eng
Abstrakt: 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.
Klíčová slova: resonance; synthetic jet; synthetic jet actuator
Číslo projektu: GA16-16596S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Proceedings of the International conference Experimental Fluid Mechanics 2016

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0266666

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-262557


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference