In the context of the active flow control of a massively separated flow through synthetic pulsed jets, the ability to determine a correspondence between the pulsation and the desired mean velocity is of prime interest and a crucial target. In the present work, an approach based on the actual mean speed and the entrained fluid in the jet is proposed using the state-of-the-art entrainment rate metrics in the evaluation. In particular, numerical simulations of a representative simplified case are performed in several conditions; the analyses are carried out using a commercial CFD solver by solving both the steady and unsteady Reynolds-Averaged Navier-Stokes system of equations closed by k − ω SST turbulence model. The study aims at determining the equivalent steady jet that provides similar entrainment effects of an unsteady setup.

Strouhal number effects on pulsating synthetic jet’s entrainment

Ponza R.;De Vanna F.;Picano F.;Benini E.
2021

Abstract

In the context of the active flow control of a massively separated flow through synthetic pulsed jets, the ability to determine a correspondence between the pulsation and the desired mean velocity is of prime interest and a crucial target. In the present work, an approach based on the actual mean speed and the entrained fluid in the jet is proposed using the state-of-the-art entrainment rate metrics in the evaluation. In particular, numerical simulations of a representative simplified case are performed in several conditions; the analyses are carried out using a commercial CFD solver by solving both the steady and unsteady Reynolds-Averaged Navier-Stokes system of equations closed by k − ω SST turbulence model. The study aims at determining the equivalent steady jet that provides similar entrainment effects of an unsteady setup.
2021
AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
978-1-62410-610-1
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3443455
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