<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The hydraulc characteristics of flow over rectangular broad-crested weirs with varying upstream slopes were experimentally studied. A series of laboratory experiments was performed to investigate the effects of changing upstream slopes from 90° to 75°, 60°, 45°, 30°, 22.5°, 15°, and 10° on the flow surface pattern, discharge coefficient values, approach velocity profile and flow separation zone. In addition, a new mathematical relationship for water surface profile and a new correction factor to estimate discharge coefficient over weirs with various upstream slopes were introduced. The results showed decreasing upstream slopes from 90° to 10° leading to increasing discharge coefficient values and dissipation of the separation zone.</p></abstract>

The hydraulc characteristics of flow over rectangular broad-crested weirs with varying upstream slopes were experimentally studied. A series of laboratory experiments was performed to investigate the effects of changing upstream slopes from 90° to 75°, 60°, 45°, 30°, 22.5°, 15°, and 10° on the flow surface pattern, discharge coefficient values, approach velocity profile and flow separation zone. In addition, a new mathematical relationship for water surface profile and a new correction factor to estimate discharge coefficient over weirs with various upstream slopes were introduced. The results showed decreasing upstream slopes from 90° to 10° leading to increasing discharge coefficient values and dissipation of the separation zone.

Flow Characteristics of Rectangular Broad-Crested Weirs with Sloped Upstream Face

School of Civil and Environmental Engineering, Georgia Institute of Technology, USA

Department of Irrigation & Reclamation, Faculty of soil & Water Eng., University of Tehran, Iran

Ministry of Energy, Fars Regional Water Authority, Shiraz, Iran

Journal of Hydrology and Hydromechanics

The hydraulc characteristics of flow over rectangular broad-crested weirs with varying upstream slopes were experimentally studied. A series of laboratory...

Flow Characteristics of Rectangular Broad-Crested Weirs with Sloped Upstream Face

Publié en ligne: 14 juin 2012

Pages: 87 - 100

DOI: https://doi.org/10.2478/v10098-012-0008-1

Mots clés
priepad širokou priepadovou hranou, sklon návodného povrchu, tvar povrchu hladiny, výtokový koeficient, korekčný faktor, oblasť separácie, profily rýchlosti prúdenia

This content is open access.

Flow Characteristics of Rectangular Broad-Crested Weirs with Sloped Upstream Face

Publié en ligne: 14 juin 2012

Pages: 87 - 100

DOI: https://doi.org/10.2478/v10098-012-0008-1

Mots cléspriepad širokou priepadovou hranou, sklon návodného povrchu, tvar povrchu hladiny, výtokový koeficient, korekčný faktor, oblasť separácie, profily rýchlosti prúdenia

This content is open access.

Mots clés
priepad širokou priepadovou hranou, sklon návodného povrchu, tvar povrchu hladiny, výtokový koeficient, korekčný faktor, oblasť separácie, profily rýchlosti prúdenia