Optimización de la geometría de un rodete tipo Pelton para flujo particulado utilizando simulación numérica.

Abstract

This work developed a methodology that allows obtaining CAD models of pelton-type turbine buckets and optimizing their performance using techniques such as 3D scanning, parameterization of the buckets using Python and Inventor, and finally numerical simulation in the commercial ANSYS software. The initial geometry was obtained from a cast of resin and plaster. Subsequently, 3D scanning was used to obtain a point cloud, which was pre-processed using Rhino6. This surface was post-processed using AUTODESK Inventor and parameterized to be able to automatically make changes to the model. The optimization was worked by varying the entry and exit angles of the jet, and the B / L ratio of the ladle. Two models were obtained: Mod1 in which the angles were modified, and Mod2 where the angles and the B / L ratio were modified. The numerical simulation was worked on in the ANSYS CFX tool, the 𝑘 − 𝜔 𝑆𝑆𝑇 model was used and abrasive particles were included, which allowed an analysis of eroded areas. The behavior of the torque in the buckets was studied and later the efficiency of each model was calculated, achieving an increase in efficiency of 7.12% and 0.23% for Mod1 and Mod2 respectively.