Hybrid synthetic jet actuator with a novel fluidic diode

The paper deals with a new design of the hybrid synthetic jet actuator (HSJ), which is based on a novel fluidic diode.The fluidic diode was tested by a static experiment and its diodicity was evaluated.The same experiment was performed for a second fluidic diode whose planar geometry was taken from the literature and the resultant diodicities were compared.Higher diodicities were achieved with the new design of the diode.The velocity resonance curves were measured at the nozzle output for two variants of the HSJ with a short or with a long nozzle.After that the volumetric efficiencies of the HSJ were evaluated as functions of the frequency.The highest efficiency (over 80%) was achieved at the second resonant frequency of the actuator with the long nozzle.