Influence of the Number of Blades in the Power Generated by a Michell Banki Turbine

Jorge Andrés Sierra Del Rio

Abstract


This article presents a computational simulation that studies the variation of power, depending on the number of blades in the runner. To develop the study, six CAD models were created using the software Solid Edge ST8, which comprises 16, 20, 23, 25, 28 and 32 blades, each corresponding to the volume of water taken into the turbine. The discretization of the control volume (water inside the turbine) was performed in the ‘meshing’ module Ansys® Workbench V17.0. The configuration of the equations that govern the fluid dynamics has been solved using Ansys CFX, where a model of homogeneous turbulence was used for the multiphase fluid (water-air), also a turbulence model that corresponds to k-e for both phases was implemented, setting the next values as boundary conditions: a speed of 3.6 m/s in the nozzle, rotational speed of 450 RPM and atmospheric pressure at the outlet. There is an increment of the 3.2% in the power generated by Michell Banki turbine, when the number of blades in the runner changes from 16 to 28. rms do not have to be defined. 

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Keywords


Cross-Flow Turbine; Transient state; Ansys CFX 17.0; CFD analysis; Micropower.

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References


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