Strangely behaving fluidic oscillator

0392031 - ÚT 2014 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Tesař, Václav - Peszyński, K.
Strangely behaving fluidic oscillator.
EFM12 - EXPERIMENTAL FLUID MECHANICS 2012. Liberec: Technical University of Liberec, 2013 - (Dančová, P.; Novotný, P.). EPJ Web of Conferences, 45. ISBN 978-80-7372-912-7. ISSN 2100-014X.
[Experimental Fluid Mechanics 2012 /7./. Hradec Králové (CZ), 20.11.2012-23.11.2012]
Grant CEP: GA TA ČR TA02020795; GA ČR(CZ) GCP101/11/J019
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: fluidics * oscillators * strouhal number
Kód oboru RIV: BK - Mechanika tekutin
http://dx.doi.org/10.1051/epjconf/20134501074

Fluidic oscillators became recently of increasing importance for a number of applications. Two alternative variants have been known so far: (a) feedback-loop configurations, with Strouhal number invariance and (b) configurations with a resonator and frequency not dependent on flow rate. Authors tested an oscillator of seemingly quite conventional two-loop design. Surprisingly, its properties fit to neither of the two established categories. Its Strouhal number is not constant and the frequency of oscillation is flow-rate dependent. There is, so far, no reasonable physical explanation for this strange behaviour.
Trvalý link: http://hdl.handle.net/11104/0228700