INFLUENCE OF INLET BOUNDARY CONDITIONS IN THE PREDICTION OF ROTOR DYNAMIC FORCES AND MOMENTS FOR A HYDRAULIC TURBINE USING CFD
Paper i proceeding, 2008

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.

Författare

Karlsson Martin

Håkan Nilsson

Chalmers, 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.

Ämneskategorier

Teknisk mekanik

Strömningsmekanik och akustik