Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydraulic characteristics of swirling flow at shaft spillways with the marguerite-shaped inlets
Hydraulic characteristics of swirling flow at shaft spillways with an innovative inlet, namely the marguerite-shaped inlet, is investigated based on model experimentation. Detailed measurements of head–discharge relationship, flow regimes, water free-surface profiles, flow circulation, discharge coefficient and threshold and critical submergence depths were performed for shaft spillways with marguerite-shaped inlets. Results indicate that the strength of swirling flow through a marguerite-shaped inlet is significantly lower than that of a simple shaft and a morning glory spillway. Marguerite-shaped inlets increase the developed crest length by at least 6 times the global size of the original shaft spillway. Therefore, they produce exceptional hydraulic performances in increasing the weir overflow length without changing the global size of the shaft spillway, thereby increasing the flow discharge up to 6, 4 and 1.5 times the simple shaft, morning glory and circular piano-key spillways, respectively. Finally, based on the detailed experimental data, different empirical correlations are derived for estimating the threshold and critical submergence depths and discharge coefficient of the marguerite-shaped inlets for different flow regimes using regression analysis.
Hydraulic characteristics of swirling flow at shaft spillways with the marguerite-shaped inlets
Hydraulic characteristics of swirling flow at shaft spillways with an innovative inlet, namely the marguerite-shaped inlet, is investigated based on model experimentation. Detailed measurements of head–discharge relationship, flow regimes, water free-surface profiles, flow circulation, discharge coefficient and threshold and critical submergence depths were performed for shaft spillways with marguerite-shaped inlets. Results indicate that the strength of swirling flow through a marguerite-shaped inlet is significantly lower than that of a simple shaft and a morning glory spillway. Marguerite-shaped inlets increase the developed crest length by at least 6 times the global size of the original shaft spillway. Therefore, they produce exceptional hydraulic performances in increasing the weir overflow length without changing the global size of the shaft spillway, thereby increasing the flow discharge up to 6, 4 and 1.5 times the simple shaft, morning glory and circular piano-key spillways, respectively. Finally, based on the detailed experimental data, different empirical correlations are derived for estimating the threshold and critical submergence depths and discharge coefficient of the marguerite-shaped inlets for different flow regimes using regression analysis.
Hydraulic characteristics of swirling flow at shaft spillways with the marguerite-shaped inlets
Kabiri-Samani, Abdorreza (Autor:in) / Keihanpour, Maedeh (Autor:in)
Journal of Hydraulic Research ; 59 ; 724-738
03.09.2021
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Swirling flow at vertical shaft spillways with circular piano-key inlets
| Online Contents | 2017
Swirling flow at vertical shaft spillways with circular piano-key inlets
| Online Contents | 2016
Swirling flow at vertical shaft spillways with circular piano-key inlets
| Taylor & Francis Verlag | 2017
HYDRAULIC DESIGN ASPECTS FOR SWIRLING FLOW AT VERTICAL DROP SHAFT SPILLWAYS
| Taylor & Francis Verlag | 2007
Parametric study of flow at circular piano-key inlets over the vertical shaft spillways
| Taylor & Francis Verlag | 2024