Emerging obstacles in supercritical open-channel flows: Detached hydraulic jump versus wall-jet-like bow wave - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Hydraulic Engineering Année : 2017

Emerging obstacles in supercritical open-channel flows: Detached hydraulic jump versus wall-jet-like bow wave

Résumé

A supercritical open-channel flow can skirt an emerged obstacle by using two distinct forms of workaround: a detached hydraulic jump or a so-called wall-jet-like bow wave. These two forms stem from the properties of supercritical flow and are described in detail. Experiments assess the conditions of appearance of one form or the other, depending on both upstream Froude number and flow-depth to obstacle-width ratio. A conceptual model, based on mass conservation, reproduces and explains the corresponding transition. For the wall-jet-like bow wave, additional information is given regarding water-depth oscillations; the associated Strouhal number show they are caused by reverse spillage on the obstacle face. Implications of the present results on scouring and forces exerted by the flow on structures justify future works on the subjec
Fichier principal
Vignette du fichier
Revised_paper_nov2016_figures.pdf (1001.7 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01724977 , version 1 (26-11-2018)

Identifiants

Citer

Nicolas Rivière, Guillaume Vouaillat, Gaby Launay, Emmanuel Mignot. Emerging obstacles in supercritical open-channel flows: Detached hydraulic jump versus wall-jet-like bow wave. Journal of Hydraulic Engineering, 2017, 147, pp.04017011. ⟨10.1061/(ASCE)HY.1943-7900.0001291⟩. ⟨hal-01724977⟩
586 Consultations
257 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More