Browsing NTNU Open by Author "Francke, Håkon Hjort"
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Increasing Hydro Turbine Operation Range and Efficiencies Using Water Injection in Draft Tubes
Francke, Håkon Hjort (Doktoravhandlinger ved NTNU, 1503-8181; 2010:184, Doctoral thesis, 2010)It is a well known fact that most Francis turbines, because of the fixed blade design, faces challenges when running at partial load operation. Especially in the operating range below approximately 50% of the rated output, ...