Utilization of CFD tools in the design process of a Francis turbine

Okyay, Gizem
Francis type turbines are commonly used in hydropower generation. Main components of the turbine are spiral case, stay vanes, guide vanes, turbine runner and the draft tube. The dimensions of these parts are dependent mainly on the design discharge, head and the speed of the rotor of the generators. In this study, a methodology is developed for parametric optimization by incorporating Matlab codes developed and commercial Computational Fluid Dynamics (CFD) codes into the design process. The design process starts with the selection of initial dimensions from experience curves, iterates to improve the overall hydraulic efficiency and obtain the detailed description of the final geometry for manufacturing with complete visualization of the computed flow field. A Francis turbine designed by the procedure developed has been manufactured and installed for energy production.


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Çalamak, Melih; Bozkuş, Zafer; Department of Civil Engineering (2010)
Waterhammer is an unsteady hydraulic problem which is commonly found in closed conduits of hydropower plants, water distribution networks and liquid pipeline systems. Due to either a malfunction of the system or inadequate operation conditions, pipeline may collapse or burst erratically resulting in substantial damages, and human losses in some cases. In this thesis, time dependent flow situations in the penstocks of small hydropower plants are investigated. A software, HAMMER, that utilizes method of chara...
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Özcan, Arslan Ömür; Aksel, Mehmet Haluk; Department of Mechanical Engineering (2016)
Francis turbine is a widely used hydraulic turbine in hydropower plants. This thesis analyzes a Francis turbine using Computational Fluid Dynamics (CFD) analysis and offers an improved design in case of energy production. First the initial performance of the turbine is analyzed using CFD analysis, possible cavitation regions are evaluated and design point of the turbine is found using hill chart method and compared with the on-site efficiency measurement results. Then an optimization study is held to improv...
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Alimoğlu, Emir; Yanmaz, A Melih; Bozkuş, Zafer; Department of Civil Engineering (2012)
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Citation Formats
G. Okyay, “Utilization of CFD tools in the design process of a Francis turbine,” M.S. - Master of Science, Middle East Technical University, 2010.