Numerical Simulation of the Flow Through a Kaplan Draft Tube

This paper presents a comparison between steady turbulent flow simulation results in the U9 Kaplan turbine draft tube and experimental velocity and pressure measurements. Two turbulence models were tested, k-epsilon and Shear StressTransport (SST). The results show that the k-epsilon model performs...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Buletin științific. Series D, Mechanical engineering Mechanical engineering, 2016, Vol.78 (4), p.215
Hauptverfasser:	Iovanel, Raluca Gabriela, Dunca, Georgiana, Bucur, Diana-Maria, Panaitescu, Valeriu-Nicolae, Cervantes, Michel
Format:	Artikel
Sprache:	eng
Schlagworte:	Fluid Mechanics Strömningslära
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	This paper presents a comparison between steady turbulent flow simulation results in the U9 Kaplan turbine draft tube and experimental velocity and pressure measurements. Two turbulence models were tested, k-epsilon and Shear StressTransport (SST). The results show that the k-epsilon model performs better than the SST model.The objective is to find a correlation between the pressure measured below the runner in the draft tube cone, and the optimal guide vane angle for a given bladeangle. Such correlation may allow the continuous online optimization of the cam characteristic. For this purpose, the influence of the tangential velocity on the pressure in the draft tube was specifically investigated.
ISSN:	1454-2358