Concept

Pelton wheel

Related publications (56)

Tool Path Generation and Post-Processor Issues in Five-Axis High Speed Machining of Hydro Turbine Blades

This paper deals with 5-axis milling of hydraulic blades. The issue developed is essentially linked to problems due to the transition from 3 to 5 axes. A specific attention is done to the Inverse Kinematics Transformation (IKT) which can be source of incoh ...

2006

Analysis of the Swirling Flow Downstream a Francis Turbine Runner

François Avellan

An experimental and theoretical investigation of the flow at the outlet of a Francis turbine runner is carried out in order to elucidate the causes of a sudden drop in the draft tube pressure recovery coefficient at a discharge near the best efficiency ope ...

2006

Numerical Flow Analysis in a Pelton Turbine Bucket

François Avellan, Mohamed Farhat, Alexandre Perrig

The flow in the Pelton turbine bucket is three-dimensional, unsteady, turbulent, features a free surface, and is influenced by the rotation-induced forces. It is therefore difficult to investigate how the energy transfer takes place between the water flow ...

International Association For Hydraulic Research2004

Validation of Bucket Flow Simulation using Dynamic Pressure Measurements

Mohamed Farhat

The paper below is a follow up of the authors contribution to the IAHR 2002, in which the simulations of the flow through Pelton buckets were presented. In 2002, a good consistency between the predicted and measured efficiency was presented. This paper wil ...

International Association For Hydraulic Research2004

Méthode d'analyse des écoulements 3D à surface libre

Sonia Kvicinsky

Free surface flows are extremely complex and appear in various cases such as chemistry, oceanography, thermodynamics and turbomachinery. Their complexity is due to the fact that they are composed of two distinct phases which are only separated by a thin in ...

EPFL2002

Numerical and Experimental Analysis of free Surface Flow in a 3D non Rotating Pelton Bucket

François Avellan, Sonia Kvicinsky

Numerical and Experimental Analysis of Free Surface Flow in a 3D Non-Rotating Pelton Bucket Low frequency fluctuations often occur in hydraulic installations equipped with fixed bladed turbines or pumps operating under off design conditions. Passive measur ...

2002

Experimental and Numerical Analysis or Free Surface Flows in a Rotating Bucket

François Avellan, Sonia Kvicinsky

The aim of this study was to provide a complete experimental and numerical analysis of the flow in a rotating Pelton bucket. For the experimental analysis, several functioning points have been used in order to study differences which may occur in various s ...

International Association For Hydraulic Research2002

Dynamic Pressure Measurements on a Model Turbine Runner and their Use in Preventing Runner Fatigue Failure

François Avellan

Hydraulic turbine runners, which operate under a wide range of heads and outputs, are subjected to considerable dynamic forces at off design conditions. Therefore a detailed knowledge of mean and fluctuating pressures is required for a safe design of the r ...

International Association For Hydraulic Research2000

Flow Calculations in Pelton Turbines,- Part 2 : Free Surface Flows

François Avellan, Philippe Dupont, Sonia Kvicinsky

Hydraulic machine design can now take advantage of advanced flow calculation methods which are made available by several CFD software companies. Thanks to these recent developments, the so called "Volume Of Fluid" (VOF) methods can be now used for the anal ...

International Association For Hydraulic Research1998

Prediction of Francis Turbines Efficiency Alteration by travelling Bubble Cavitation

François Avellan, Philippe Dupont

The setting level of a hydraulic machine, specially for low head machines, is decided with respect to the possible alteration of the efficiency due to the cavity development. This alteration can easily be noticed by plotting the evolution of the efficiency ...

International Association For Hydraulic Research1998

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