Numerical Flow Analysis of the GAMM Turbine at nominal and off-design Operating Conditions

The flow in a Francis turbine runner (GAMM Turbine) is analysed numerically. Different operating points are calculated using two industrial software packages based respectively on a finite element method (N3S) and a finite volume method (TASCflow®) and compared to experimental results. The numerical results allow to observe physical phenomena in the runner that are important in the process of hydraulic turbomachinery design. Values of Cu and Cm velocity components, blade pressure distribution and recirculation in the flow are compared to experimental results at nominal and off-design flow conditions. The experimental and numerical results show a similar efficiency evolution in function of flow rate and head, however the absolute level of energetic losses are overestimated by the two numerical codes.


Published in:
Proceedings of the19th IAHR Symposium on Hydraulic machinery and cavitation, Singapore, Republic of Singapore, 1, 5, 121-128
Presented at:
19th IAHR Symposium on Hydraulic machinery and cavitation, Singapore, Republic of Singapore, September 9-11, 1998
Year:
1998
Publisher:
International Association For Hydraulic Research
ISBN:
981-02-3961-0
Note:
Using Smart Source Parsing 9-11 Sept. pp 3
Laboratories:




 Record created 2005-11-04, last modified 2018-05-01

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