Publications by Etienne Parkinson

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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 ...

An experimental study of flow in a Francis hydraulic turbine, especially designed for the GAMM Workshop, has been carried out. In order to provide a data base for the validation and comparison of computational fluid dynamics codes, a Francis turbine mode! and adequate instrumentation have been specially developed. Measurements of both global and local quantities have been performed for the best operating point of the turbine. A five-hole probe mounted on a remote traversing system provides static pressure a

Three dimensional numerical tools are now commonly used in the design or analysis process of the internai flow of hydraulic machinery. As an illustration of the use of such tools to study the internai flow of a Francis turbine, the computational results obtained in all components of this turbine with an Euler equations solver and two Reynolds Averaged Navier Stokes equations solvers are discussed. The analysis process is illustrated and comparisons with experimental results obtained in the spiral casing and

Experimental flow analysis of hydraulic machines is of prime importance for improving the design of such a unit. Moreover, computational fluid dynamics codes need an experimental data reference in order to check their ability to simulate the main flow features. To obtain such an experimental data base a Francis turbine model and an associated instrumentation is specially developed. Measurements of both global and local quantities are performed for five different operating points of the turbine. A five-hole

Flow visualizations using endoscopes in a 21-bucket single-injector reduced scale Pelton turbine are performed for 2 operating points. 2 types of visualizations are performed with a CMOS high-speed camera: (i) an onboard visualization of the flow in the bu ...

The aim of the paper is to present the results of investigations conducted on the free surface flow in a Pelton turbine model bucket. Unsteady numerical simulations, based on the two-phase homogeneous model, are performed together with wall pressure measur ...

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 analysis of the free surface flows in a Pelton Turbine. The aim of this paper is to evaluate this VOF approach with respect to the computation of the jet at the outlet of a Pelton injector and its trajectory in the buckets.

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 ...

Etienne Parkinson

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

Experimental flow study of the GAMM turbine model

Comparison of Flow Computation Results with experimental Flow Surveys in a Francis Turbine

Flow survey and blade pressure measurements in a Francis turbine model

Onboard Flow Visualization in a Pelton Turbine Bucket

Flow in a Pelton Turbine Bucket: Numerical and Experimental Investigations

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

Numerical Flow Analysis in a Pelton Turbine Bucket

Analyse expérimentale de l'interaction roue - distributeur dans une pompe - turbine

Three-Dimensional Flow Analysis of an Hydraulic Francis Turbine

Cavitation development in a centrifugal pump : numerical and model tests predictions

Sonde à 5 trous IMHEF

Définitions géométriques dans un circuit hydraulique : version 2.2

Spiral casing analysis SEW-4

Modèle de pertes énergétiques dans une turbine Francis : Application à la turbine 0.500 IMHEF

Model Testing for Refurbishment Projects

Modèle de pertes énergétiques dans une turbine Francis

Centrifugal pump performance drop due to leading edge cavitation : numerical predictions compared with model tests

Normalisation et bilans caractéristiques : Application à une turbine Francis

Rapport d'activités 1992 Groupe EVA : Activités expérimentales