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Validation of Francis Water Turbine CFD Simulations

Zoran Čarija ; Tehnički fakultet Sveučilišta u Rijeci, Rijeka, Croatia
Zoran Mrša ; Tehnički fakultet Sveučilišta u Rijeci, Rijeka, Croatia
Sanjin Fućak ; Tehnički fakultet Sveučilišta u Rijeci, Rijeka, Croatia

Sažetak

This paper compares data from calculated and measured results covering the whole operating range for a 20 MW Francis turbine in order to validate the CFD simulation. Computed hydraulic characteristics are determined for each analyzed operating point by running numerical simulations of turbulent fluid flow through a complete Francis Turbine model using the commercial fluid flow solver Fluent. The measured hydraulic characteristics were defined by on-site measurements according to the IEC41 international field acceptance test standard. The computed characteristics show very good conformity of values and trend-lines with measured characteristics over the whole operating range. The deviations
are lowest around the optimum and increase towards the boundaries of the operating range where the vorticity in the turbine diffuser is more significant. The aim was to analyze the behavior of the existing turbine and fine-tune the whole numerical experiment to achieve the level of accuracy necessary for a concept design of a revitalized turbine.

Ključne riječi

CFD; Fluent; Francis turbine; Hydraulic characteristics; Hydraulic turbomachine

Hrčak ID:

40257

URI

https://hrcak.srce.hr/40257

Datum izdavanja:

31.3.2008.

Posjeta: 5.788 *