Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
HYDRAULIC POWER OPTIMIZATION OF THE ARCHIMEDES TURBINE USING NUMERICAL SIMULATION
Submission Author:
Maurício Guilherme Alves dos Reis , MG , Brazil
Co-Authors:
Maurício Guilherme Alves dos Reis, Solidônio Carvalho
Presenter: Maurício Guilherme Alves dos Reis
doi://10.26678/ABCM.COBEM2019.COB2019-0429
Abstract
The objective of this study is to determine the parameters that optimize the hydraulic efficiency of the Archimedes turbine. The OpenFOAM software is used to numerically simulate the flow in an Archimedes turbine. The Nelder-Mead Simplex optimization method controls the parameters used in the numerical simulations. The numerically calculated mechanical power is corrected by an efficiency accounting for the leakage in the gaps between the screw and trough. The water flow and the head are kept fixed and the variables are the rotation, the internal radius, the helical pitch and the inclination of the screw. The maximum hydraulic efficiency calculated was greater than 86%. It was observed that the reduction of inclination and internal radius raises the efficiency of the three-bladed Archimedes turbine. The optimal inclination calculated in the present work is close to the results presented in numerical and experimental reference works. The results of this work show that the Archimedes turbine with the highest efficiency presents low overfilling leakage and constant hydrostatic height variation between each blade. It is concluded that the optimization together with numerical simulation is a viable tool for the Archimedes turbine design.
Keywords
Archimedes turbine, micro hydro generation, multiphase flow, Optimization, OpenFOAM
