Publications associées à Turbine Francis

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

Anton Schleiss, Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier

Sudden starting and stopping of turbines and pumps lead to highly unsteady flow in tailrace channels of hydropower plants (HPP). Submergence of Pelton turbines and air entrainment in pumps due to surge waves must be avoided by technical measures. The exist ...

Asce-Amer Soc Civil Engineers2014

A fully modular tool for small-signal stability analysis of hydroelectric systems

Philippe Allenbach, Basile Kawkabani, Sébastien Alligné, Pedro Camilo de Oliveira e Silva

In electrical systems, the small-signal stability analysis method is usually applied to synchronous machines by using the Park representation (d, q-components). This paper presents the generalization of a different approach for this method, based on a, b, ...

IEEE2014

Flow restoration in Alpine streams affected by hydropower operations—a case study for a compensation basin

Anton Schleiss, Martin Peter Bieri, Michael Müller

Hydropeaking, resulting from rapid starting and shut-down of turbines, is one of the major hydrological alterations in Alpine streams. The upper Aare River basin in Switzerland comprises a complex high-head storage hydropower scheme. The significant turbin ...

CRC Press/Balkema2014

Mind the gap - tip leakage vortex in axial turbines

Mohamed Farhat, Matthieu Dreyer

The tendency of designing large Kaplan turbines with a continuous increase of output power is bringing to the front the cavitation erosion issue. Due to the flow in the gap between the runner and the discharge ring, axial turbine blades may develop the so ...

Iop Publishing Ltd2014

High-resolution LES of the rotating stall in a reduced scale model pump-turbine

François Avellan, Olivier Pacot, Chisachi Kato

Extending the operating range of modern pump-turbines becomes increasingly important in the course of the integration of renewable energy sources in the existing power grid. However, at partial load condition in pumping mode, the occurrence of rotating sta ...

Iop Publishing Ltd2014

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Giovanni De Cesare, Martin Peter Bieri, Stéphane Christian Olivier Terrier, Sylvain Candolfi

Pump and turbine operations lead to head losses in the tailrace channel. Pumping discharge may be limited due to potential air entrainment into the pump shaft when the downstream reservoir is at its lowest level and the head losses are too high. Regarding ...

2014

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

François Avellan, Christophe Nicolet, Arthur Tristan Favrel, Christian Landry, Andres Müller, Keita Yamamoto

Hydraulic machines operating in a wider range are subjected to cavitation developments inducing undesirable pressure pulsations which could lead to potential instability of the power plant. The occurrence of pulsating cavitation volumes in the runner and t ...

IOP Publishing Ltd2014

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

François Avellan, Christophe Nicolet, Arthur Tristan Favrel, Christian Landry, Keita Yamamoto

Iop Publishing Ltd2014

Effects of Positive versus Negative Yaw Angles on Wind-Turbine Performance: An Application of BEM Theory

Fernando Porté Agel, Majid Bastankhah

Wind-turbine wakes have negative effects on wind-farm performance. They are associated with: (a) the velocity deficit, which reduces the generated power of downwind turbines; and (b) the turbulence level, which increases the fatigue loads on downwind turbi ...

2014

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Turbine Francis

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

A fully modular tool for small-signal stability analysis of hydroelectric systems

Flow restoration in Alpine streams affected by hydropower operations—a case study for a compensation basin

Mind the gap - tip leakage vortex in axial turbines

High-resolution LES of the rotating stall in a reduced scale model pump-turbine

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental and Numerical Assessment of the Aeroelastic Stability of Blade Pair Packages

Effects of Positive versus Negative Yaw Angles on Wind-Turbine Performance: An Application of BEM Theory

Graph Chatbot

Chattez avec Graph Search

Surge Wave Propagation in a Common Tailrace Channel for Two Large Pumped-Storage Plants

A fully modular tool for small-signal stability analysis of hydroelectric systems

Mind the gap - tip leakage vortex in axial turbines

High-resolution LES of the rotating stall in a reduced scale model pump-turbine

Optimization of a Shared Tailrace Channel of Two Pumped-Storage Plants by Physical and Numerical Modeling

Flow restoration in Alpine streams affected by hydropower operations—a case study for a compensation basin

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental investigation of the local wave speed in a draft tube with cavitation vortex rope

Experimental and Numerical Assessment of the Aeroelastic Stability of Blade Pair Packages

Effects of Positive versus Negative Yaw Angles on Wind-Turbine Performance: An Application of BEM Theory