Estudio numérico de una turbina hidráulica tipo Kaplan usando OpenFOAM.

Abstract

This research project was focused on establishing a methodology for the CFD analysis of Kaplan turbines using OpenFOAM, in this way a steady state analysis using a hybrid mesh was proposed. The objective of using OpenFOAM is to take advantage of the versatility it offers to obtain hybrid meshes that meet the mesh quality parameters despite the complex geometries applied. A steady-state study was also selected to identify critical areas of the geometry and adequately capture the development of velocity, pressure, and vorticity profiles. In addition, the k-omega SST turbulence model was chosen to perform an in-depth analysis of the Yplus parameter considering the dynamic viscosity in the resolution of the mathematical model. Subsequently, a result validation was performed by contrasting the experimental data with the efficiency values for different flow rates obtained. This allowed choosing a flow rate with a low error, with which the mesh independence analysis was performed. Finally, the post-processing was carried out where the pressure, velocity and vorticity profiles generated at the outlet of the impeller.