A synthetic jet is a zero-mass pulsatile jet. A common approach in creating a synthetic jet is to use a cavity with an orifice on one side and an oscillating membrane on another side. In this study the dynamics of a piezoelectrically driven synthetic jet is investigated using a laser nano sensor to capture the temporal and spatial deflection of the membrane. The frequency and voltage response of the piezoelectric membrane for different cavity dimensions are presented, while the velocity field of the resulted jet is characterized by hotwire anemometry. Subsequently, the volume of the expelled jet for any given exit diameter is correlated to the resulting jet velocity. It is found that at a formation number around 3 the nature of the average jet velocity changes and the resulting jet velocity shows less sensitivity to the formation number.

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