Flow stability analysis and excitation using pulsating jets

Dionysios Skamnakis; Kyriakos Papailiou

doi:10.1016/j.crme.2005.06.004

Flow stability analysis and excitation using pulsating jets

Presented by: Pierre Perrier

Dionysios Skamnakis ¹; Kyriakos Papailiou ¹

¹ Laboratory of Thermal Turbomachines, National Technical University of Athens, Greece

Comptes Rendus. Mécanique, Volume 333 (2005) no. 8, pp. 628-635.

Abstract
Résumé

Classical flow stability applied to transition from laminar to turbulent flow may also describe the behavior of vorticity fluctuations created by a pulsating jet placed along a solid boundary. A numerical laminar flow experiment involving a pulsating jet placed along the surface of a duct with flow separation downstream, resulted in eliminating most part of the separated flow region. Applying the same approach to a turbulent flow, it was possible to develop a turbulent stability flow formulation and apply successfully turbulent pulsating jet flow separation control.

La théorie de stabilité classique de l'écoulement laminaire, appliquée à la région de transition d'une couche limite, peut décrire aussi le comportement des fluctuations de vorticité créées par un jet pulsé, placé le long d'une paroi solide. Une expérience numérique sur l'écoulement laminaire dans un conduit avec décollement a confirmé la vérité de cette thèse. Cette analyse théorique s'est développée pour le cas d'un jet pulsé turbulent qui a été placé dans une configuration analogue. L'expérience numérique réalisée sur ce cas turbulent a produit des résultats qui ont confirmés les expériences réalisées dans une soufflerie subsonique.

Received: 2004-05-18
Accepted: 2005-05-25
Published online: 2005-08-01

DOI: 10.1016/j.crme.2005.06.004

Keywords: Control, Flow, Pulsating, Synthetic, Jet, Stability
Mots-clés : Automatique, Écoulement, Jet, Stabilité

Author's affiliations:

Dionysios Skamnakis ¹; Kyriakos Papailiou ¹

¹ Laboratory of Thermal Turbomachines, National Technical University of Athens, Greece

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Dionysios Skamnakis; Kyriakos Papailiou. Flow stability analysis and excitation using pulsating jets. Comptes Rendus. Mécanique, Volume 333 (2005) no. 8, pp. 628-635. doi : 10.1016/j.crme.2005.06.004. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.06.004/

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