Hybrid Synthetic Jet Actuator With A Novel
Fluidic Diode
Author(s)
J. Kord´ık & Z. Tr´avn´ıˇcek
Abstract
The paper deals with a new design of the hybrid synthetic jet actuator (HSJ), which
is based on a novel fluidic diode. The fluidic diodewas 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.
Keywords: synthetic jet, hybrid synthetic jet, rectification effect.
1 Introduction
Hybrid synthetic jets, which were first introduced in [1–4], combine the usual
synthetic jet and valveless pump principles. The valveless pump [5–10] is a
pumping device consisting of a chamber equipped with a moving piston or
diaphragm, the chamber is connected to a fluidic diode and a nozzle. The
orientation of the fluidic diode is adjusted so that its forward direction is oriented
toward the inside of the chamber. Once the diaphragm oscillates, a nonzero net
mass flow is created in the nozzle (rectification effect). Unlike the valveless pump,
the nozzle of the hybrid synthetic jet actuator (HSJA) issues into ambience where
the hybrid synthetic jet (HSJ) is formed.
The experimental investigation offers many unexplored possibilities, as hybrid
synthetic jets represent a new research topic, with only a few papers dedicated
Keywords
synthetic jet, hybrid synthetic jet, rectification effect.
Related Book
Other papers in this volume
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