Control of self-sustained oscillations of a three-dimensional water jet in a slender channel
by Nora Bensider; Amina Mataoui; Mohamed Aksouh
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 19, No. 2, 2019

Abstract: This work focuses on control of an oscillatory main jet submerged in a slender channel of small thickness to width ratio, by two lateral opposite and normal injections arranged at the same height, on the end sidewalls of the channel right above the main jet exit. The objective of this work is about the control of the jet deviation and its oscillations frequency, according to the flow rate of the two lateral injections. The validation confirms that second-order turbulence models predict more accurately such flows than first-order models. Due to Coanda effect, jet oscillations have been highlighted for several Flow rate ratios (β). Two flow behaviours of time averaged flow fields corresponding to two ranges of β are detected. It appears that the key question of this flow is also the two oscillatory motions of the main and the lateral jets.

Online publication date: Mon, 25-Mar-2019

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