Two forward-flow regimes in actuator nozzles with large-amplitude pulsation

0386169 - ÚT 2014 RIV CH eng J - Článek v odborném periodiku
Tesař, Václav - Kordík, Jozef
Two forward-flow regimes in actuator nozzles with large-amplitude pulsation.
Sensors and Actuators A - Physical. Roč. 191, MAR 1 2013 (2013), s. 34-44. ISSN 0924-4247. E-ISSN 1873-3069
Grant CEP: GA ČR(CZ) GCP101/11/J019; GA TA ČR TA02020795; GA ČR GPP101/12/P556
Výzkumný záměr: CEZ:AV0Z20760514
Institucionální podpora: RVO:61388998
Klíčová slova: nozzle * unsteady flow * velocity profiles
Kód oboru RIV: BK - Mechanika tekutin
Impakt faktor: 1.943, rok: 2013
http://www.sciencedirect.com/science/article/pii/S0924424712007224

Investigations of pulsatile flows in a wide range of frequencies in a simply-shaped nozzle with return flow back into the nozzle during a part of the cycle led to discovery of effects not previously mentioned in literature. In a synergetic approach, data from hot-wire anemometer measurements are supported by numerical flowfield computations. Particularly interesting is the existence of two different characters of the flowfield inside the nozzle in the forward-flow part of the period. In the transition between the two regimes, the initial annular-flow dominated configuration changes into a central-dominated flow.
Trvalý link: http://hdl.handle.net/11104/0221873