Visualization of synthetic jet formation in air

0448852 - ÚT 2016 RIV DE eng J - Journal Article
Trávníček, Zdeněk - Broučková, Zuzana - Kordík, Jozef - Vít, T.
Visualization of synthetic jet formation in air.
Journal of Visualization. Roč. 18, č. 4 (2015), s. 595-609. ISSN 1343-8875. E-ISSN 1875-8975
R&D Projects: GA ČR GA14-08888S
Institutional support: RVO:61388998
Keywords : synthetic jet * flow visualization * hot-wire anemometry
Subject RIV: JU - Aeronautics, Aerodynamics, Aircrafts
Impact factor: 0.720, year: 2015
http://link.springer.com/article/10.1007/s12650-015-0273-2

This experimental study deals with a round synthetic jet (SJ) issuing into quiescent surroundings. Flow visualization in air is used to identify different flow field regimes. Hot-wire anemometry, laser Doppler vibrometry, and theoretical evaluations are used to quantify parameters in terms of the Reynolds (Re) and Stokes (S) numbers. Four flow regimes are presented by means of a Re–S parameter map: (a) creeping flow without SJ formation, (b) SJ formation and propagation without vortex rollup, (c) SJ with vortex rollup, and (d) vortex structure breakdown, instability and transition to turbulence. The results are reasonably consistent with available literature.
Permanent Link: http://hdl.handle.net/11104/0251410