@article{Decaix:15020,
      recid = {15020},
      author = {Decaix, Jean and Mertille, Mathieu and Drommi, Jean-Louis  and Hugo, Nicolas and Münch-Alligné, Cécile},
      title = {Computation fluid dynamics investigation of the flow in  junctions : application to hydraulic short circuit  operating mode},
      publisher = {Taylor & Francis},
      journal = {LHB},
      address = {Abingdon-ont Thames, UK. 2024-01},
      number = {ARTICLE},
      pages = {16 p.},
      abstract = {Due to the penetration of stochastic low-carbon sources of  production, requirements for flexible generation increase.  The flexibility of pumped storage hydropower plants in pump  mode can be improved by implementing hydraulic short  circuit modes, which consists in operating the turbine(s)  and the pump(s) in parallel. This new operating mode can be  investigated by computational fluid dynamics to determine  the head losses and to investigate the flow topology. Nine  geometries of the Grand’Maison and Forces Motrices  Hongrin-Léman (FMHL/FMHL+) plants are considered. Due to  the lack of measurements, simulations are performed using  different turbulence models and meshes to assess the  uncertainty of the results. A statistical analysis of the  results shows that low values of the head loss coefficients  are obtained for geometries that limit the impingement of  the flow on the walls and the development of a swirling  flow downstream. Such geometries have the benefit of also  limiting the wall pressure fluctuations and wall shear  stresses, i.e. the risk of cavitation and the abrasion of  the pipe walls due to sediment transport. These new results  for the hydropower community are valuable for owners in  implementing hydraulic short circuit mode in existing power  plants or in designing new suitable junctions.},
      url = {http://arodes.hes-so.ch/record/15020},
      doi = {https://doi.org/10.1080/27678490.2023.2290025},
}