Centrifugal instabilities in a curved rectangular duct of small aspect ratio
Résumé
We report experimental results on the stability of the flow occurring in a curved rectangular duct of small aspect ratio, where the centrifugational forces act along the largest dimension. The basic flow is three-dimensional as in a square or circular curved duct, and above a critical flow rate, streamwise vortices are observed. The threshold of the instability is found to be controlled by a Dean number.
Origine : Fichiers éditeurs autorisés sur une archive ouverte