Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Optimization study on an ultra-low head bulb hydro turbine
Submission Author:
Antonio Carlos Barkett Botan , MG
Co-Authors:
Antonio Carlos Barkett Botan, Ramiro Gustavo Ramirez Camacho, Geraldo Tiago Filho
Presenter: Antonio Carlos Barkett Botan
doi://10.26678/ABCM.COBEM2017.COB17-1237
Abstract
The increase of efficiency of a turbomachine requires a behavior analysis of the flow on its hydromechanical components, in a global way. For a proposal of modification in the profile of the components on a conceptual machine, aiming its optimization, it is necessary to survey into the reason of the possible shortcomings and, finally, to present arguments for their optimization. The use of Computational Fluid Dynamics (CFD) tools are widely used in these researches. Consolidated axial turbines, in general, presents very significant efficiencies, however, machines that operate under special conditions, such as turbines for ultra-low heads condition (0.5 meters to 5.0 meters), are still under development, opening space for research on performance improvements. This work presents an analysis based on the results obtained by computational study through CFD, in order to evaluate an ultra-low head turbine model, proposing the optimization of its performance. The analysis discussed in this paper suggested the exclusion of the original draft tube system, in order to verify the behaviour of the fluid flow. This modification resulted in a slight improvement of the efficiency.
Keywords
Bulb turbine, ultra-low head, CFD analysis
