Procedure for predicting part load resonance in Francis turbine hydropower units based on swirl number and local cavitation coefficient similitude

Autor: Christophe Nicolet, François Avellan, Christian R. Landry, João Gomes Pereira, Sebastian Alligné, Arthur Tristan Favrel, Loïc Andolfatto

Publikováno v: Mechanical Systems and Signal Processing. 132:84-101

Francis turbines operating at part load conditions develop a cavitation precessing vortex known as a vortex rope in the draft tube cone below the runner outlet. At part load conditions, this vortex precession acts as an excitation source inducing pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50b48548a024e3778188e3c0c00de2d6
https://doi.org/10.1016/j.ymssp.2019.06.011

Oxygen diffusion through air–water free surfaces in a pump–turbine operating in condenser mode

Autor: R. Guillaume, François Avellan, P. Leroy, Elena Vagnoni, Loïc Andolfatto

Publikováno v: International Journal of Multiphase Flow. 112:183-192

The present research aims at understanding the mass transfer of air into water in a reversible pump turbine operating in condenser mode. In particular, the diffusion of oxygen through the water free-surface both in the vaneless gap between the impell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5ec2e02cf48134338c9fe766d10ae48
https://doi.org/10.1016/j.ijmultiphaseflow.2018.11.011

Experimental investigation of the sloshing motion of the water free surface in the draft tube of a Francis turbine operating in synchronous condenser mode

Autor: Arthur Tristan Favrel, François Avellan, Elena Vagnoni, Loïc Andolfatto

Publikováno v: Experiments in Fluids. 59

Hydropower units may be required to operate in condenser mode to supply reactive power. In this operating mode, the water level in the turbine or pump-turbine is decreased below the runner by closing the guide vanes and injecting pressurized air. Whi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a1bb914946d65dfd01b0568c7a1cbb2
https://doi.org/10.1007/s00348-018-2552-x

Toward design optimization of a Pelton turbine runner

Autor: François Avellan, Loïc Andolfatto, Christian Vessaz, Christophe Tournier

Publikováno v: Structural and Multidisciplinary Optimization
Structural and Multidisciplinary Optimization, Springer Verlag (Germany), 2017, ⟨10.1007/s00158-016-1465-7⟩

International audience; The objective of the present paper is to propose a strategy to optimize the performance of a Pelton runner based on a parametric model of the bucket geometry, massive particle based numerical simulations and advanced optimizat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::337785726d6c25bfe338a45dffe2a375
https://hal.archives-ouvertes.fr/hal-01521737/file/2017_Vessaz_Andolfatto_Avellan_Tournier_Author_Manuscript.pdf

On Neural Networks’ Ability to Approximate Geometrical Variation Propagation in Assembly

Autor: Loïc Andolfatto, Marc Douilly, François Thiébaut, Claire Lartigue

Publikováno v: 12th CIRP Conference on Computer Aided Tolerancing
12th CIRP Conference on Computer Aided Tolerancing, Apr 2012, Huddersfield, United Kingdom. pp.224-232, ⟨10.1016/j.procir.2013.08.035⟩

International audience; Tolerance analysis is an important step to validate assembly process planning scenario. Simulations are generally performed to evaluate the expected geometrical variations of the assembled product. When the simulation models t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bde6579d2a62238b15fe88c4c71a402a
https://doi.org/10.1016/j.procir.2013.08.035