The behavior of single and twin circular synthetic jets devices is experimentally investigated by using Particle Image Velocimetry (PIV) at a Reynolds number equal to 5,100 and a Strouhal number equal to 0.024. The twin synthetic jets are in phase opposition and different inter-axes distances (l) have been studied. Moreover, several nozzle-to-plate distances (H/D=2, 4, 6, 8 and 10) have been investigated. The twin synthetic jets show an interaction which causes higher time-averaged axial velocities and fluctuations than the single synthetic jet case and lower jet width. The time-averaged turbulent fluctuations show that both the single synthetic jet and the twin synthetic jets have a region characterized by low values of turbulence (potential core-like region). The evolution of the mean and statistics quantities have been described through phase-averaged measurements. High turbulence is observed along the shear layer emanated by the nozzle edge and in the vortex ring core. Also the saddle point behavior has been investigated.

Impinging Single and Twin Circular Synthetic Jets Flow Field / Castrillo, Giusy; Greco, CARLO SALVATORE; Crispo, Cuono Massimo; Astarita, Tommaso; Cardone, Gennaro. - (2015). (Intervento presentato al convegno 11th International Symposium on Particle Image Velocimetry tenutosi a Santa Barbara, California, U.S.A. nel September 14-16, 2015).

Impinging Single and Twin Circular Synthetic Jets Flow Field

CASTRILLO, GIUSY;GRECO, CARLO SALVATORE;Crispo, Cuono Massimo;ASTARITA, TOMMASO;CARDONE, GENNARO
2015

Abstract

The behavior of single and twin circular synthetic jets devices is experimentally investigated by using Particle Image Velocimetry (PIV) at a Reynolds number equal to 5,100 and a Strouhal number equal to 0.024. The twin synthetic jets are in phase opposition and different inter-axes distances (l) have been studied. Moreover, several nozzle-to-plate distances (H/D=2, 4, 6, 8 and 10) have been investigated. The twin synthetic jets show an interaction which causes higher time-averaged axial velocities and fluctuations than the single synthetic jet case and lower jet width. The time-averaged turbulent fluctuations show that both the single synthetic jet and the twin synthetic jets have a region characterized by low values of turbulence (potential core-like region). The evolution of the mean and statistics quantities have been described through phase-averaged measurements. High turbulence is observed along the shear layer emanated by the nozzle edge and in the vortex ring core. Also the saddle point behavior has been investigated.
2015
Impinging Single and Twin Circular Synthetic Jets Flow Field / Castrillo, Giusy; Greco, CARLO SALVATORE; Crispo, Cuono Massimo; Astarita, Tommaso; Cardone, Gennaro. - (2015). (Intervento presentato al convegno 11th International Symposium on Particle Image Velocimetry tenutosi a Santa Barbara, California, U.S.A. nel September 14-16, 2015).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/661640
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