Self-similar vortex-induced vibrations of a hanging string - École polytechnique Accéder directement au contenu
Article Dans Une Revue Journal of Fluid Mechanics Année : 2013

Self-similar vortex-induced vibrations of a hanging string

Résumé

An experimental analysis of the vortex-induced vibrations of a hanging string with variable tension along its length is presented in this paper. It is shown that standing waves develop along the hanging string. First, the evolution of the Strouhal number S t with the Reynolds number R e follows a trend similar to what is observed for a circular cylinder in a flow for relatively low Reynolds numbers (32 < Re < 700). Second, the extracted mode shapes are self-similar: a rescaling of the spanwise coordinate by a self-similarity coefficient allows all of them to collapse onto a unique function. The self-similar behaviour of the spatial distribution of the vibrations along the hanging string is then explained theoretically by performing a linear stability analysis of an adapted wake-oscillator model. This linear stability analysis finally provides an accurate description of the mode shapes and of the evolution of the self-similarity coefficient with the flow speed.
Fichier principal
Vignette du fichier
S0022112013002048a.pdf (1.4 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00996483 , version 1 (02-06-2014)

Identifiants

Citer

Clément Grouthier, Sébastien Michelin, Y. Modarres-Sadeghi, Emmanuel de Langre. Self-similar vortex-induced vibrations of a hanging string. Journal of Fluid Mechanics, 2013, 724, pp.R2. ⟨10.1017/jfm.2013.204⟩. ⟨hal-00996483⟩
129 Consultations
219 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More