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INFLUENCE OF INLET BOUNDARY CONDITIONS IN THE PREDICTION OF ROTOR DYNAMIC FORCES AND MOMENTS FOR A HYDRAULIC TURBINE USING CFD

Karlsson Martin ; Håkan Nilsson (Institutionen för tillämpad mekanik, Strömningslära) ; Aidanpää Jan-Olov
Proceedings of the 12th International Symposium on Transport Phenomenoa and Dynamics of Rotating Machinery (ISROMAC), Honolulu, Hawaii, February 17-22, 2008. (2008)
[Konferensbidrag, refereegranskat]

The rotordynamic behaviour of a hydraulic turbine is influenced by fluid-rotor interactions at the turbine runner. In this paper computational fluid dynamics (CFD) is used to numerically predict the rotordynamical excitation forces due to the flow through a hydraulic turbine runner. The simulations are carried out for three diffferent boundary conditions. One axi-symmetric inlet boundary condition, and two axi-periodic boundary conditions. The two latter are obtained from separate simulations of wicket gate and spiral casing flow. It is found that the inlet boundary condition significantly affects the rotordynamical forces and moments.



Denna post skapades 2008-05-14. Senast ändrad 2014-09-29.
CPL Pubid: 70949

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Fastkroppsmekanik
Strömningsmekanik

Chalmers infrastruktur