Hysteresis in annular impinging jets

0383370 - ÚT 2014 RIV US eng J - Článek v odborném periodiku
Trávníček, Zdeněk - Tesař, Václav
Hysteresis in annular impinging jets.
Experimental Thermal and Fluid Science. Roč. 44, Januar 2013 (2013), s. 565-570. ISSN 0894-1777. E-ISSN 1879-2286
Grant CEP: GA AV ČR(CZ) IAA200760801; GA ČR(CZ) GCP101/11/J019
Výzkumný záměr: CEZ:AV0Z20760514
Institucionální podpora: RVO:61388998
Klíčová slova: impinging jet * bistability * hysteresis
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 2.080, rok: 2013
http://www.sciencedirect.com/science/article/pii/S0894177712002348

Annular impinging air jets were investigated experimentally using the techniques of flow visualization, measurement of the stagnation pressure, and the naphthalene sublimation method. The bistability and hysteresis lead to two different alternative flow field patterns (A or B) under identical boundary conditions. The bistability and hysteresis were found only at small Reynolds numbers, and at small annular nozzle slot widths. An extension of the nozzle centerbody promotes the tendency to the hysteretic behavior. An enhancement effect for the area-average heat/mass transfer coefficients for the pattern B over A has been quantified. The highest achieved increase was quite significant 32%.
Trvalý link: http://hdl.handle.net/11104/0213328