Publications associées à Turbine de Tesla

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

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

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

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 high. Regarding turb ...

2012

Fracture of convoluted and lamellar α2 + γ TiAl alloys

Andreas Mortensen, Frédéric Diologent, Nicolas Vincent Barbi

Fracture toughness tests are conducted at room temperature and 923 K (650 degrees C) on SENB (Single Edge Notched Bend) specimens of three different (alpha(2) + gamma ) TiAl-based alloys. One alloy is a conventional near fully lamellar Ti-45Al-2Mn-2Nb + 0. ...

Elsevier2012

Hydrodynamics of a Pump-Turbine Operating at Off-Design Conditions in Generating Mode: Experimental Investigation

François Avellan, Mohamed Farhat, Vlad Hasmatuchi, Steven Roth, Francisco Botero

Modern pump-turbines are subject to frequent switching between the pumping and generating modes with extended operation under off-design conditions. Depending on the specific speed of the pump-turbine, the discharge-speed as well as torque-speed characteri ...

2011

Non-Linear Stability Analysis of a Reduced Scale Model Pump-Turbine at Off-Design Operation

François Avellan, Christian Landry, Andres Müller, Sébastien Alligné, Vlad Hasmatuchi, Steven Roth

Nowadays, the pump-storage power plants are a proven solution for storing electricity at large scale and offering flexibility to the power management. Therefore, the hydraulic machines are increasingly subject to off-design operation, start-up and shutdown ...

2011

Experimental Evidence of Rotating Stall in a Pump-Turbine at Off-Design Conditions in Generating Mode

François Avellan, Mohamed Farhat, Vlad Hasmatuchi, Steven Roth, Francisco Botero

An experimental investigation of the rotating stall in reduced scale model of a low specific speed radial pump-turbine at runaway and turbine brake conditions in generating mode is achieved. Measurements of wall pressure in the stator are performed along w ...

American Society of Mechanical Engineers2011

High-speed flow visualization in a pump-turbine under off-design operating conditions

François Avellan, Mohamed Farhat, Vlad Hasmatuchi, Steven Roth, Francisco Botero

The flow hydrodynamics in a low specific speed radial pump-turbine reduced scale model is experimentally investigated under off-design operating conditions in generating mode. Wall pressure measurements, in the stator, synchronized with high-speed flow vis ...

International Association For Hydraulic Research2010

Fluid-Structure Coupling in the Guide Vanes Cascade of a Pump-Turbine Scale Model

François Avellan, Mohamed Farhat, Vlad Hasmatuchi, Steven Roth, Francisco Botero

The present study concerns fluid-structure coupling phenomena occurring in a guide vane cascade of a pump-turbine scale model placed in the EPFL PF3 test rig. An advanced instrument set is used to monitor both vibrating structures and the surrounding flow. ...

International Association For Hydraulic Research2010

Hydrodynamics of a Pump-Turbine under Off-Design Operating Conditions in Generating Mode

François Avellan, Mohamed Farhat, Vlad Hasmatuchi

The experimental investigation of the hydrodynamics of a reversible pump-turbine reduced scale model in off-design operating conditions is presented. The onset and development of flow instabilities outside the “normal” operating range, in generating mode, ...

EPFL Doctoral Conference in Mechanics - EDCM20102010

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Turbine de Tesla

New microwave sensor for on-line Blade Tip Timing in gas and steam turbines

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

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

Fracture of convoluted and lamellar α2 + γ TiAl alloys

Hydrodynamics of a Pump-Turbine Operating at Off-Design Conditions in Generating Mode: Experimental Investigation

Non-Linear Stability Analysis of a Reduced Scale Model Pump-Turbine at Off-Design Operation

Experimental Evidence of Rotating Stall in a Pump-Turbine at Off-Design Conditions in Generating Mode

High-speed flow visualization in a pump-turbine under off-design operating conditions

Fluid-Structure Coupling in the Guide Vanes Cascade of a Pump-Turbine Scale Model

Hydrodynamics of a Pump-Turbine under Off-Design Operating Conditions in Generating Mode

Graph Chatbot

Chattez avec Graph Search

High-speed flow visualization in a pump-turbine under off-design operating conditions

New microwave sensor for on-line Blade Tip Timing in gas and steam turbines

Fracture of convoluted and lamellar α2 + γ TiAl alloys

Hydrodynamics of a Pump-Turbine Operating at Off-Design Conditions in Generating Mode: Experimental Investigation

Flow and waves in a common tailrace channel of two pump-storage plants - physical and numerical simulation

Non-Linear Stability Analysis of a Reduced Scale Model Pump-Turbine at Off-Design Operation

Experimental Evidence of Rotating Stall in a Pump-Turbine at Off-Design Conditions in Generating Mode

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

Hydrodynamics of a Pump-Turbine under Off-Design Operating Conditions in Generating Mode

Fluid-Structure Coupling in the Guide Vanes Cascade of a Pump-Turbine Scale Model