Affiliations: Institute of Thermomechanics of the ASCR v. v. i.,
Dolejškova 5, 182 00 Prague, Czech Republic. E-mail: [email protected]
Abstract: The design of the discussed fluid jet actuator followed two ideas: a
double-acting operation of reciprocating pumps, and a hybrid synthetic jet
(HSJ) actuation. The entire actuator consists of two basic parts, namely the
front (central) and rear chambers, from which fluid is displaced by the
opposite sides of the same diaphragm. The actuator operates in a double-acting
(antiphase) regime with air as the working fluid. The central chamber generates
the standard (zero-net-mass-flux) axisymmetric synthetic jet (SJ), while the
rear chamber generates system of several non-zero-net-mass-flux HSJs arranged
around the central SJ. A number of variants of HSJs with different geometry
were designed, manufactured and tested. Their behavior was investigated
experimentally using the smoke visualization, reaction force measurement,
hot-wire anemometry, and naphthalene sublimation technique. The tests confirm
the efficiency of the present design.