Fluidic Oscillators performance with shape modification and under incompressible and compressible flow
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A given shape of a Fluidic Oscillator (FO) is studied via 3D-CFD simulations, the output flow pulsating frequency versus the inlet Reynolds number is initially obtained. The internal shape of the (FO) has then been modified to understand the effect of the different internal parts on the output frequency and amplitude. The modification of the feedback channel length has been performed under compressible flow conditions and clarified which is the origin of the self sustained oscillations. The same origin has been found regardless of the fluid being considered as compressible or incompressible and for all different internal shapes studied.