Concept

Francis turbine

Related publications (263)

Numerical investigations of the dynamics of the full load vortex rope in a Francis turbine.

François Avellan, Andres Müller, Nicolas Ruchonnet, Olivier Braun, Adrien Taruffi

The draft tube vortex rope occurring in Francis Turbines at full load is a potential cause of severe system instabilities, limiting the operating range of concerned hydro power plants. Studies focusing on physical mechanisms [1], methods for stability asse ...

2013

Innertkirchen compensation basin outlets – Flap gate combined with small stilling basin

Michael Pfister, Fränz Zeimetz

In the context of an update of their hydropower plants, the Hydroelectric Company KWO plans an adaption of their powerhouses Innertkirchen 1 and 2. One aim of the project is, among many others, an optimized restitution regime of the turbined water to the A ...

2013

Large-scale Computation of the Pump-Turbine Rotating Stall

François Avellan, Olivier Pacot, Chisachi Kato

The purpose of this paper is to show the feasibility of a large-scale unsteady flow computation. This computation consists in the simulation of the rotating stall appearing into a pump-turbine operating at part load condition (Q/QBEP=76%) in pumping mode. ...

2013

Experimental Aeroelastic Investigation of Vibrating Turbine Blade Clusters

Peter Ott, Achim Zanker

This paper presents and discusses unsteady experimental results of controlled vibration measurements of blade-cluster and single-blade test cases, all subjected to the same subsonic ow conditions. The experiments were performed in a non-rotating annular te ...

2013

Efficient runner safety assessment during early design phase and root cause analysis

Olivier Braun

Fatigue related problems in Francis turbines, especially high head Francis turbines, have been published several times in the last years. During operation the runner is exposed to various steady and unsteady hydraulic loads. Therefore the analysis of force ...

International Association For Hydraulic Research2012

Analysis of the dynamic response of pump-turbine runners- Part I: Experiment

François Avellan, Mohamed Farhat, Xiaopeng Huang, Eduard Egusquiza

When in operation, pump-turbine runners have to withstand large pressure pulsations generated by the rotor-stator interaction. The analysis of the dynamic behavior of these structures is necessary to avoid damage. For this analysis a realistic model of the ...

International Association For Hydraulic Research2012

Pressure pulsation in Kaplan turbines: Prototype-CFD comparison

François Avellan, Arturo Rivetti

Pressure pulsation phenomena in a large Kaplan turbine are investigated by means of numerical simulations (CFD) and prototype measurements in order to study the dynamic behavior of flow due to the blade passage and its interaction with other components of ...

International Association For Hydraulic Research2012

Simulation of water column separation in Francis pump-turbine draft tube

François Avellan, Christophe Nicolet, Sébastien Alligné

The paper presents the modelling, simulation and analysis of the transient behaviour of a 340 MW pump-turbine in case of emergency shutdown in turbine mode with focus on possible draft tube water column separation. The model of a pumped storage power plant ...

International Association For Hydraulic Research2012

Parametric study of water column separation in Francis pump-turbine draft tube

François Avellan, Christophe Nicolet, Sébastien Alligné

The paper presents the modelling, simulation and analysis of the transient behaviour of a 340 MW pump-turbine in case of emergency shutdown in generation mode with particular attention to the possible draft tube water column separation. First, the model of ...

Soc Hydrotechnique France2012

Non-Intrusive Detection of Rotating-Stall Occurring in the Turbine Quadrant of Francis-Type Pump-Turbines

Francisco Botero

The so-called rotating-stall (RS) is an undesired hydrodynamic phenomenon affecting the regular function of Francis-type pump-turbines. Stronger noise and vibration increase the risk of catastrophic failures and economic loses. In the past, such phenomenon ...

EAFIT University2012

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