Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis
In hydropower, the exploitation of small power sources requires the use of small turbines that combine efficiency and economy. Banki-Michell turbines represent a possible choice for their simplicity and for their good efficiency under variable load conditions. Several experimental and numerical test...
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Online Access: | http://www.mdpi.com/1996-1073/6/5/2362 |
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doaj-463f244018e34220b6d00d995bc2315a2020-11-24T23:27:10ZengMDPI AGEnergies1996-10732013-04-01652362238510.3390/en6052362Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic AnalysisTullio TucciarelliOreste FecarottaArmando CarravettaCostanza AricòVincenzo SammartanoIn hydropower, the exploitation of small power sources requires the use of small turbines that combine efficiency and economy. Banki-Michell turbines represent a possible choice for their simplicity and for their good efficiency under variable load conditions. Several experimental and numerical tests have already been designed for examining the best geometry and optimal design of cross-flow type machines, but a theoretical framework for a sequential design of the turbine parameters, taking full advantage of recently expanded computational capabilities, is still missing. To this aim, after a review of the available criteria for Banki-Michell parameter design, a novel two-step procedure is described. In the first step, the initial and final blade angles, the outer impeller diameter and the shape of the nozzle are selected using a simple hydrodynamic analysis, based on a very strong simplification of reality. In the second step, the inner diameter, as well as the number of blades and their shape, are selected by testing single options using computational fluid dynamics (CFD) simulations, starting from the suggested literature values. Good efficiency is attained not only for the design discharge, but also for a large range of variability around the design value.http://www.mdpi.com/1996-1073/6/5/2362hydraulic turbineBanki-Michellcross-flow turbineCFD analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tullio Tucciarelli Oreste Fecarotta Armando Carravetta Costanza Aricò Vincenzo Sammartano |
spellingShingle |
Tullio Tucciarelli Oreste Fecarotta Armando Carravetta Costanza Aricò Vincenzo Sammartano Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis Energies hydraulic turbine Banki-Michell cross-flow turbine CFD analysis |
author_facet |
Tullio Tucciarelli Oreste Fecarotta Armando Carravetta Costanza Aricò Vincenzo Sammartano |
author_sort |
Tullio Tucciarelli |
title |
Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis |
title_short |
Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis |
title_full |
Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis |
title_fullStr |
Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis |
title_full_unstemmed |
Banki-Michell Optimal Design by Computational Fluid Dynamics Testing and Hydrodynamic Analysis |
title_sort |
banki-michell optimal design by computational fluid dynamics testing and hydrodynamic analysis |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2013-04-01 |
description |
In hydropower, the exploitation of small power sources requires the use of small turbines that combine efficiency and economy. Banki-Michell turbines represent a possible choice for their simplicity and for their good efficiency under variable load conditions. Several experimental and numerical tests have already been designed for examining the best geometry and optimal design of cross-flow type machines, but a theoretical framework for a sequential design of the turbine parameters, taking full advantage of recently expanded computational capabilities, is still missing. To this aim, after a review of the available criteria for Banki-Michell parameter design, a novel two-step procedure is described. In the first step, the initial and final blade angles, the outer impeller diameter and the shape of the nozzle are selected using a simple hydrodynamic analysis, based on a very strong simplification of reality. In the second step, the inner diameter, as well as the number of blades and their shape, are selected by testing single options using computational fluid dynamics (CFD) simulations, starting from the suggested literature values. Good efficiency is attained not only for the design discharge, but also for a large range of variability around the design value. |
topic |
hydraulic turbine Banki-Michell cross-flow turbine CFD analysis |
url |
http://www.mdpi.com/1996-1073/6/5/2362 |
work_keys_str_mv |
AT tulliotucciarelli bankimichelloptimaldesignbycomputationalfluiddynamicstestingandhydrodynamicanalysis AT orestefecarotta bankimichelloptimaldesignbycomputationalfluiddynamicstestingandhydrodynamicanalysis AT armandocarravetta bankimichelloptimaldesignbycomputationalfluiddynamicstestingandhydrodynamicanalysis AT costanzaarico bankimichelloptimaldesignbycomputationalfluiddynamicstestingandhydrodynamicanalysis AT vincenzosammartano bankimichelloptimaldesignbycomputationalfluiddynamicstestingandhydrodynamicanalysis |
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