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Large Eddy Simulation of a Pulsed Jet in Crossflow

par Coussement, Axel ;Gicquel, Olivier ;Schuller, Thierry;Degrez, Gérard
Référence 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition(Orlando), Proceedings of the 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Publication Publié, 2010-01-05

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Résumé :

This study quantifies the mixing resulting of a pulsed jet injected in a jet in crossflow configuration. By large eddy simulation computations, it also helps to under- stand the physical phenomena involved in the formation of the pulsed jet in crossflow. The boundary conditions of the jet inlet were implemented via an NSCBC coupled with a Fourier series development. The signal used to pulse the jet inlet was a square or a sine wave. A new way of charac- terizing the mixing is introduced with the goal of easily in- terpreting and quantifying the complicated mixing process involved in pulsed jet in crossflow flow fields. Different flow configurations, pulsed and non-pulsed were computed and compared. This comparison no only allows to characterize the mixing but also to point out some properties of those mix- ing curves.