There is generally limited guidance available on the optimum clamping method for the diaphragms used in the SJAs. This paper describes the effects of clamping methods (O-rings, neoprene rubber washers and metal-to-metal clamping) on the actuator diaphragm displacement using Polytec Scan Vibrometer (PSV). Once the clamping type was conducted, an optimization study to examine the effect of geometrical parameters for three designs of synthetic jet actuators in quiescent conditions – in particular number of orifices per cavity, the space between them and their effects on the jet velocity were investigated. It has also been shown that by utilising the Helmholtz resonance of the cavity and amplitude modulation of the excitation signal, the actuator can exhibit a more significant “blowing” velocity at a reduced power input.
|Journal||Journal of Fluids Engineering, Transactions of the ASME|
|Early online date||28 Oct 2020|
|Publication status||E-pub ahead of print - 28 Oct 2020|