Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Free surface intake vortices: theoretical model and measurements
Axially stretched free-surface vortices occur at low-head hydropower intakes under specific flow and geometric conditions. When they are sufficiently strong, they can harm performance or cause premature failure of mechanical components such as turbine blades or guide vanes. Laboratory-scale experimental models are currently used to assess the risk of vortex formation during the design phase, but uncertainty remains as to how vortex characteristics translate from the laboratory scale to the much larger scale of an actual hydropower plant. This paper proposes a semi-empirical model that roughly predicts how the approach flow and intake geometry determine the key vortex characteristics (the core radius, bulk circulation and the depth of the free surface depression). The model is developed using detailed velocity measurements of the approach flow and the flow inside the vortex in a laboratory-scale physical model, using analytical models and insights drawn from previous work.
Free surface intake vortices: theoretical model and measurements
Axially stretched free-surface vortices occur at low-head hydropower intakes under specific flow and geometric conditions. When they are sufficiently strong, they can harm performance or cause premature failure of mechanical components such as turbine blades or guide vanes. Laboratory-scale experimental models are currently used to assess the risk of vortex formation during the design phase, but uncertainty remains as to how vortex characteristics translate from the laboratory scale to the much larger scale of an actual hydropower plant. This paper proposes a semi-empirical model that roughly predicts how the approach flow and intake geometry determine the key vortex characteristics (the core radius, bulk circulation and the depth of the free surface depression). The model is developed using detailed velocity measurements of the approach flow and the flow inside the vortex in a laboratory-scale physical model, using analytical models and insights drawn from previous work.
Free surface intake vortices: theoretical model and measurements
Suerich-Gulick, Frank (Autor:in) / Gaskin, Susan. J. (Autor:in) / Villeneuve, Marc (Autor:in) / Parkinson, Étienne (Autor:in)
Journal of Hydraulic Research ; 52 ; 502-512
04.07.2014
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Free surface intake vortices: theoretical model and measurements
| British Library Online Contents | 2014
Free surface intake vortices: theoretical model and measurements
| Online Contents | 2014
Free-surface stretching-sustained intake vortices
| British Library Online Contents | 2009
Free-surface stretching-sustained intake vortices
| Online Contents | 2009
Free-surface stretching-sustained intake vortices
| Online Contents | 2009