The paper presents numerical simulations of flow in a model of a high head Francis turbine and comparison of results to the measurements. Numerical simulations were done by two CFD (Computational Fluid Dynamics) codes, ANSYS CFX and OpenFOAM. Steady-state simulations were performed by standard k-ɛ and SST models, while for transient simulations the SAS SST model in combination with ZLES in the draft tube was used. With proper grid refinement in distributor and runner and taking into account losses in labyrinth seals quite accurate prediction of torque on the shaft, head and efficiency was obtained.

Vpliv izgub v labirintnih tesnilih na izkoristek visokotlačne Francisove turbine (Effect of Losses in Labyrinth Seals on Efficiency of a High Head Francis Turbine)

MORGUT, MITJA;NOBILE, ENRICO
2015

Abstract

The paper presents numerical simulations of flow in a model of a high head Francis turbine and comparison of results to the measurements. Numerical simulations were done by two CFD (Computational Fluid Dynamics) codes, ANSYS CFX and OpenFOAM. Steady-state simulations were performed by standard k-ɛ and SST models, while for transient simulations the SAS SST model in combination with ZLES in the draft tube was used. With proper grid refinement in distributor and runner and taking into account losses in labyrinth seals quite accurate prediction of torque on the shaft, head and efficiency was obtained.
9789619385906
http://www.drustvozamehaniko.si/zbornik/ZbornikKD2015.pdf
File in questo prodotto:
File Dimensione Formato  
Accusim_KD2015.pdf

non disponibili

Descrizione: pdf editoriale
Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 1.08 MB
Formato Adobe PDF
1.08 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2890250
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact