Flow pulsation in the near-wall layer of impinging jets

0392037 - ÚT 2014 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Tesař, Václav
Flow pulsation in the near-wall layer of impinging jets.
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 ČR GA13-23046S
Výzkumný záměr: CEZ:AV0Z20760514
Institucionální podpora: RVO:61388998
Klíčová slova: impinging jets * flow pulsation * numerical computation
Kód oboru RIV: BK - Mechanika tekutin
http://dx.doi.org/10.1051/epjconf/20134501129

Pulsation of impinging jets promises to become a useful way towards achieving the highest possible rate of passive scalar convective transport between fluid and a wall. Author investigated experimentally steady and pulsated impingement by hot-wire anemometer traversing along a radial line at a small height above the impingement wall. The data have shown two conspicuous local maxima of fluctuation intensity. In an attempt to reach understanding of these phenomena, numerical flowfield computations were also made, fitted to the experimental conditions. Despite simplification (isotropic handling of unsteadiness, eddies computed as Reynolds-type phase averages) the synergetic approach (experiment & computation) revealed interesting correlation and resulted in useful interpretations of the old problem of the off-axis extremes – and also brings new views on their behaviour in the pulsating jet case.
Trvalý link: http://hdl.handle.net/11104/0228701