Influence of inlet boundary conditions in the prediction of rotor dynamic forces and moments for a hydraulic turbine using CFD
2008 (English)In: ISROMAC-12: the Twelfth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery ; Honolulu, Hawaii, February 17 - 22, 2008, Pacific Center of Thermal-Fluids Engineering, Honolulu, 2008Conference paper (Refereed)
The rotordynamic behavior 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 different 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.
Place, publisher, year, edition, pages
Research subject Computer Aided Design
IdentifiersURN: urn:nbn:se:ltu:diva-32142Local ID: 68760610-a29e-11dc-ac39-000ea68e967bOAI: oai:DiVA.org:ltu-32142DiVA: diva2:1005376
International Symposium on Transport Phenomena and Dynamics of Rotating Machinery : 17/02/2008 - 22/02/2008
Godkänd; 2008; Bibliografisk uppgift: 1 CD-ROM; 20071204 (karmar)2016-09-302016-09-30Bibliographically approved