Název: EXPERIMENTAL AND NUMERICAL STUDY OF A CONTROLLED PULSATING FLOW
Autoři: Pírková, L. ; Kopecký, V. ; Trávníček, Zdeněk
Typ dokumentu: Příspěvky z konference
Konference/Akce: STRUTEX /15./, Liberec (CZ), 01.12. 2008 / 2008-12-03
Rok: 2008
Jazyk: eng
Abstrakt: A turbulent round air jet discharging into quiescent ambience was studied under circumferential excitation. Four synthetic jet actuators were distributed around the main nozzle exit; they were fed by an electronic control system with a chosen polarity and phase shift. This arrangement allowed to excite the main round jet in several modes, namely the (A) axisymmetric, (B) plane symmetric, (C) bifurcated, and (D) helical modes. The measurement of the excited jet flow fields A–D was performed using the PIV technique. Further, preliminary development of a numerical model of controlled pulsating jet flow is described. Relevant parameters in the numerical model and their effect on model accuracy were investigated. Emphasis is on the mesh density and time step size. This parametric study allowed us to clearly identify a regime of optimal mesh densities and time step sizes for the Reynolds number of interest. The simulations were calculated in Fluent.
Klíčová slova: jet vectoring; PIV measurement; synthetic jet
Číslo projektu: CEZ:AV0Z20760514 (CEP), IAA200760801 (CEP)
Poskytovatel projektu: GA AV ČR
Zdrojový dokument: 15th International Conference, STRUTEX, ISBN 978-80-7372-418-4

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0174944

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-40431


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference