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The flow in the U9 Kaplan turbine - preliminary and planned simulations using CFX and OpenFOAM

Olivier Petit (Institutionen för tillämpad mekanik, Strömningslära) ; Håkan Nilsson (Institutionen för tillämpad mekanik, Strömningslära) ; Thi VU ; Ovidiu MANOLE ; Svante LEONSSON
24th IAHR Symposium Hydraulic MAchinery and Systems, Foz Do Iguassu, Brasil (2008)
[Konferensbidrag, refereegranskat]

The present work compares the CFX and OpenFOAM CFD codes with respect to the prediction of the flow in the U9 Kaplan turbine spiral casing, distributor and draft tube. The simulations use similar settings and the same computational grids – unstructured wall-function grids with 10.3M cells in the spiral casing and distributor, and 1.04M cells in the draft tube. The results show that the two codes give similar results in the spiral casing and distributor, and almost identical results in the draft tube. Previous studies [1] have shown the same behaviour in the Turbine-99 draft tube, for a block-structured wall-function grid. There are however no previous studies where the flow in a spiral casing and distributor have been studied and compared using the same settings and computational grid in CFX and OpenFOAM. The next phase of the project consists of comparisons with the results from an on-going experimental investigation.

Nyckelord: CFD, Water Turbine, Draft Tube, Spiral Casing, Distributor, CFX, OpenFOAM

Denna post skapades 2008-12-16. Senast ändrad 2014-09-29.
CPL Pubid: 81614


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära (2005-2017)



Chalmers infrastruktur

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