Abstract
The Francis-99 test case consists in a high head Francis turbine model, which geometry together with meshes and detailed experimental measurements is freely available at www.francis-99.org. Three workshops were initially planned to exchange experience on numerical investigations of the test case concerning steady state operating conditions, transient operating conditions and fluid structure analysis. The first workshop was held in Trondheim, Norway in December 2014. Some results of the 14 contributions are presented. They are concerned with the influence of the near wall space discretization and turbulence modelling in order to capture hydraulic efficiency, torque, pressure and velocity with a good uncertainty at three operating conditions.
Highlights
Computational fluid dynamic (CFD) is used to study the flow inside hydraulic turbines since some decades, Keck [1]
An open test case allowing the researcher to interact on such issues is necessary to develop CFD technique applied to hydraulic turbines
The Francis-99 test case consists of a high head Francis turbine model, which geometry together with detailed experimental measurements are freely available at www.francis-99.org
Summary
Computational fluid dynamic (CFD) is used to study the flow inside hydraulic turbines since some decades, Keck [1]. An open test case allowing the researcher to interact on such issues is necessary to develop CFD technique applied to hydraulic turbines. The Francis-99 test case consists of a high head Francis turbine model, which geometry together with detailed experimental measurements are freely available at www.francis-99.org. The first workshop aimed to determine the state of the art in simulation of high head Francis turbines under steady operations: part load (PL), best efficiency point (BEP) and high load (HL). It was held in Trondheim, Norway, in December 2014. All the papers presented at the workshop are freely available in the Journal of Physics, Volume 579
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