Análisis comparativo del comportamiento hidráulico de una rápida escalonada para flujos de aproximación subcrítico y supercrítico mediante modelación numérica utilizando el paquete computacional ansys fluent.

Abstract

The present investigation begins with a bibliographic review on the behavior of the flow over a stepped spillway, the process of energy dissipation and other hydraulic characteristics of the skimming flow in the stepped spillway. Subsequently, information is collected from the studies carried out in the projects PIMI-16-06-P2-T1 and PIMI-16-06-P2-T2, which have experimentally analyzed the behavior of a flow with a subcritical and supercritical approach and were used to validate the simulation performed. In this way, this project seeks to make a comparison through numerical methods between the properties of the subcritical and supercritical approach flow in a stepped spillway, in this sense, the process begins with a study of the independence of the meshing of the model, once an appropriate meshing has been identified, we proceed to define the boundary conditions and carry out the simulation of the model; the flow velocity is compared with the experimental results of the projects described above, resulting in an average error of less than 10% for different flows, which is why it is considered a valid modeling. Finally, the flows for different hydraulic parameters are compared, paying special attention to the percentage of energy dissipation whose results were higher for a subcritical approach flow, between 13 and 2.17% for different flows, thus denoting a superior dissipation efficiency of the stepped spillway for this type of approach flow.