Simulación numérica de la erosión producida por partículas solidadas en una turbina tipo Francis, bajo las condiciones de sedimentación del rio Pastaza utilizando el paquete computacional ANSYS-CFX

Abstract

The present study is an investigation to achieve the characterization of the sediments of the Pastaza River and the estimation of its erosive potential, through the numerical simulation of the effect that solid particles have when colliding on a blade of a runner of a Francis Turbine. The investigation is carried out by obtaining sediment samples through a field investigation carried out at the Agoyan Hydroelectric. In order to characterize the sediments, laboratory tests are carried out to obtain: The distribution of particle sizes, their mineralogical composition, the concentration of total solids, the determination of the shape, and the erosive potential that it may have in relation to it. which, the behavior of the sediments is studied by means of numerical modeling, under the use of CFD, in ANSYS-CFX. The study is carried out in a reference Francis Turbine whose hydraulic variables are known and in a certain way comparable. The main effects that the sediments have on the runner blade are exempted under the analysis of the RANS (Reynolds Averaged Navier Stokes) turbulence models, while; To analyze the erosive potential, two erosion models are used: Finnie and Tabakoff.