Publication de 4 numéros par an
ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336
Indexed in
INTERACTION CHARACTERISTICS OF MULTIPLE SWEEPING JET ACTUATORS IN SERIES
RÉSUMÉ
An external flow field of a single oscillator is characterized and the interaction characteristics of an array of oscillators in quiescent environment are studied in this experimental investigation. Time-averaged and phase-averaged velocity fields of a single oscillator are studied to characterize the external flow field. A spacing between the oscillators and volume flow rate were varied to study their effects on the jet interaction characteristics. Sweeping jet oscillation similarity was ensured using frequency characteristics of the oscillators. Two-dimensional particle image velocimetry (PIV) was used to characterize the external flow field. The method of zero-crossing was used for phase-averaging and the characteristics of the jet exiting from the oscillator at various phases were studied. The interaction height of the oscillating jets is influenced by the spacing between the oscillators and is found to increase with the spacing. The volume flow rate does not significantly affect the interaction height. The change in the spacing alters the deficit in the velocity between the peaks, while the change in the volume flow rate spatially shifts the profiles in the streamwise direction as the flow momentum is directly dependent on the volume flow rate. The deficit in velocity between the peaks increases with the spacing; however, an increase in the flow rate at the same spacing decreases this deficit.
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