Experimental investigations on wake vortices and their alleviation

Ömer Savaş

doi:10.1016/j.crhy.2005.05.004

Experimental investigations on wake vortices and their alleviation

Ömer Savaş ¹

¹ Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740, USA

Comptes Rendus. Physique, Aircraft trailing vortices, Volume 6 (2005) no. 4-5, pp. 415-429.

Abstract
Résumé

Recent wake vortex research in the laboratory has benefited considerably from concurrent analytical and numerical research on the instability of vortex systems. Tow tank, with dye flow visualization and particle image velocimetry is the most effective combination for laboratory research. Passive and active wake alleviation schemes have been successfully demonstrated in the laboratory. The passive alleviation systems exploit the natural evolution of vortex instabilities while the active systems rely on hastening selected instabilities by forcing the vortices individually or as a system. Their practical applicability, however, will have to meet further criteria beyond those dictated by fluid dynamics.

Les recherches actuelles en laboratoire sur les tourbillons de sillage s'appuient largement sur les avancées récentes dans le domaine de l'analyse théorique des écoulements tourbillonnaires (stabilité) et sur les progrès réalisés dans le domaine de la simulation numérique. La traction de maquettes dans un bassin hydrodynamique, associée à des mesures PIV (Particle Image Velocimetry), constitue probablement la méthode expérimentale la plus efficace pour ce type d'études. Des méthodes de contrôle passif et actif visant à réduire l'intensité des tourbillons ont été testées avec succès dans ce type d'installation. Le contrôle passif exploite le caractère intrinsèquement instable de configurations de tourbillons engendrées par des plans de voilure particuliers. Le contrôle actif consiste à forcer les modes d'instabilités dominants. Ces méthodes sont efficaces, mais leur mise en pratique soulève un certain nombre de problèmes qui sont discutés ici et qui ne relèvent pas que de la mécanique des fluides.

Published online: 2005-05-01

DOI: 10.1016/j.crhy.2005.05.004

Keywords: Wake vortex, Alleviation, Passive alleviation, Active alleviation, Vortex experiments
Mots-clés : Tourbillon de sillage, Contrôle, Contrôle passif, Contrôle actif, Recherches sur les tourbillons de sillage

Author's affiliations:

Ömer Savaş ¹

¹ Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740, USA

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Ömer Savaş. Experimental investigations on wake vortices and their alleviation. Comptes Rendus. Physique, Aircraft trailing vortices, Volume 6 (2005) no. 4-5, pp. 415-429. doi : 10.1016/j.crhy.2005.05.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2005.05.004/

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