Publications de Jean-Louis Kueny

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Investigation of the rotor-stator interactions of a reduced-scale model 0.19 ν= pump-turbine in generating mode is presented for the maximum discharge operating condition. This operating point is chosen in order to have the most important rotor-stator inte ...

The present study deals with the shedding process of the Kármán vortices at the trailing edge of a 2D hydrofoil at high Reynolds numbers. Investigations are performed in order to evaluate the ability of an unsteady numerical simulation to accurately reprod ...

The aim of this paper is to apply a surface parameterization to a blade. This geometric representation should be used as a practical tool in the process of design optimization. Most parameterizations are based on blade section approaches. The parameters ar ...

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 ...

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 measures, such as air admission or minor design modifications, are commonly taken as a last resort to try to reduce these phenomena. This article describes an active control approach to the problem, which is based upon a rotating valve exciter. The idea is to cr

This paper presents an investigation of the hydro elastic behavior of vibrating blades in hydraulic machines, which is of strong interest for turbo machinery applications. As a representative case study for vibrating blade in hydraulic machines, a NACA 000 ...

The flow in a Francis turbine runner (GAMM Turbine) is analysed numerically. Different operating points are calculated using two industrial software packages based respectively on a finite element method (N3S) and a finite volume method (TASCflow®) and compared to experimental results. The numerical results allow to observe physical phenomena in the runner that are important in the process of hydraulic turbomachinery design. Values of Cu and Cm velocity components, blade pressure distribution and recirculat

Regions of positive slope in the pressure-discharge characteristics are one of the major concerns in design and operation of centrifugal pumps, as they are limiting the admissible operating range to values above the critical discharge. The industrial pump ...

In the present study, a CFD model for cavitation simulation have been investigated and compared to experimental results in the case of 3-bladed industrial inducer. The model uses a multiphase approach, based on multiphase mixture assumption. A truncated form of Rayleigh-Plesset equation is used as a source term for the inter-phase mass transfer. The model allows a good prediction of the cavitation inception as well as the main cavity dimensions. The threshold corresponding to the head drop is also well pred

Numerical simulation of the unsteady turbulent flow in a three-dimensional draft tube geometry is performed. The investigation is carried out with a commercial finite volume solver implementing the Reynolds averaged Navier-Stokes equations. The modeling of ...

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 ...

The parallel rotor-stator computation capabilities of Fine Turbo and CFX-TASCflow CFD commercial codes have been investigated within the frame of the European ESPRIT project HPNURSA. Unsteady computations have been performed for simple test cases, where fl ...

New developments of free surface flows computation have been made by several CFD software companies. Thanks to these developments, new methods such as the Volume of Fluid (VOF) can be now used for the analysis of the free surface flows in various hydraulic machines. However, this method needs an experimental validation. The aim of this study is to experimentally validate the VOF method applied to a case such as the jet impact on a plane wall.

Comment repousser les limites de fonctionnement des pompes, turbines, hélices, moteurs cryogéniques de fusées … sans contraindre le liquide qui les traverse à "caviter" ? Pourquoi un liquide qui coule trop vite se fracture-t-il en donnant naissance à des cavités gazeuses ? Comment prévoir et maîtriser les conséquences néfastes, voire catastrophiques de la cavitation dans les installations hydrauliques ? Comment une simple bulle de vapeur peut-elle, en implosant, endommager les matériaux les plus résistants

Jean-Louis Kueny

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Pump-Turbine Rotor-Stator Interactions in Generating Mode: Pressure Fluctuation in Distributor Channel

Kármán vortex shedding in the wake of a 2D hydrofoil: Measurement and numerical simulation

Surface Parametrization of a Francis Runner Turbine for Optimum Design

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

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

Numerical investigations of fluid structure coupling: oscillating hydrofoil

Numerical Flow Analysis of the GAMM Turbine at nominal and off-design Operating Conditions

Numerical Analysis of Flow Phenomena Related to the Unstable Energy-Discharge Characteristic of a Pump-Turbine in Pump Mode

Experimental and Numerical Cavitation Flow Analysis of an Industrial Inducer

Flow Simulation in an Elbow Diffuser : Verification and Validation

Flow in a Pelton Turbine Bucket: Numerical and Experimental Investigations

Unsteady Rotor - Stator Analysis of Hydraulic Pump - Turbine : CFD and Experimental Approach

Free surface flow : experimental validation of volume of fluid (VOF) method in the plane wall case

Etude du champ instationnaire de vitesse en sortie de roue de turbine : étude expérimentale et numérique

La cavitation : mécanismes physiques et aspects industriels

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

Werle - Legendre Separation in a Hydraulic Machine Draft Tube

Three-dimensional analysis of the flow in the Ercoftac draft tube with N3S and fluent softwares

Analysis and practical solution of a vibration problem occuring after refurbishment of a pump plant

Francis runner design