Flow Induced Stresses in a Francis Runner using ANSYS

In structural analysis, the finite element method has shown to be a strong numerical technique to provide good engineering accuracy. In the present work, the flow induced stresses in a Francis turbine runner is presented by using the finite element analysis. Loads due to pressure on the blade and centrifugal force based on the rotational speed were considered. Load due to pressure was derived from CFD computations of the runner at different power conditions. In order to increase understanding about combined loads acting on blades, stress distribution over the blades were obtained for three operating conditions at a medium head hydro power plant.

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