Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry

In the present study, the implementation of multi-blade profiles in a Savonius rotor was evaluated in order to increase the pressure in the blade’s intrados and, thus, decrease motion resistance. The geometric proportions of the secondary element were determined, which maximized the rotor’s performa...

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Autores principales:	Luis A. Gallo, Edwin L. Chica, Elkin G. Flórez, Felipe A. Obando
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	wind power Savonius rotor multi-element experimental design response surface CFD Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/76ff798fdda04a368645393937f57a2d
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spelling	oai:doaj.org-article:76ff798fdda04a368645393937f57a2d2021-11-25T16:31:58ZNumerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry10.3390/app1122105802076-3417https://doaj.org/article/76ff798fdda04a368645393937f57a2d2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10580https://doaj.org/toc/2076-3417In the present study, the implementation of multi-blade profiles in a Savonius rotor was evaluated in order to increase the pressure in the blade’s intrados and, thus, decrease motion resistance. The geometric proportions of the secondary element were determined, which maximized the rotor’s performance. For this, the response surface methodology was used through a full factorial experimental design and a face-centered central composite design, consisting of three factors, each with three levels. The response variable that was sought to be maximized was the power coefficient (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>C</mi><mi>P</mi></msub></semantics></math></inline-formula>), which was obtained through the numerical simulation of the geometric configurations resulting from the different treatments. All geometries were studied under the same parameters and computational fluid dynamics models through the <i>ANSYS Fluent</i> software. The results obtained through both experimental designs showed a difference of only 1.06% in the performance estimates using the regression model and 3.41% when simulating the optimal proportions geometries. The optimized geometry was characterized by a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>C</mi><mi>P</mi></msub></semantics></math></inline-formula> of 0.2948, which constitutes an increase of 10.8% in its performance compared to the profile without secondary elements and of 51.2% compared to the conventional semicircular profile. The numerical results were contrasted with experimental data obtained using a wind tunnel, revealing a good degree of fit.Luis A. GalloEdwin L. ChicaElkin G. FlórezFelipe A. ObandoMDPI AGarticlewind powerSavonius rotormulti-elementexperimental designresponse surfaceCFDTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10580, p 10580 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	wind power Savonius rotor multi-element experimental design response surface CFD Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	wind power Savonius rotor multi-element experimental design response surface CFD Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Luis A. Gallo Edwin L. Chica Elkin G. Flórez Felipe A. Obando Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
description	In the present study, the implementation of multi-blade profiles in a Savonius rotor was evaluated in order to increase the pressure in the blade’s intrados and, thus, decrease motion resistance. The geometric proportions of the secondary element were determined, which maximized the rotor’s performance. For this, the response surface methodology was used through a full factorial experimental design and a face-centered central composite design, consisting of three factors, each with three levels. The response variable that was sought to be maximized was the power coefficient (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>C</mi><mi>P</mi></msub></semantics></math></inline-formula>), which was obtained through the numerical simulation of the geometric configurations resulting from the different treatments. All geometries were studied under the same parameters and computational fluid dynamics models through the <i>ANSYS Fluent</i> software. The results obtained through both experimental designs showed a difference of only 1.06% in the performance estimates using the regression model and 3.41% when simulating the optimal proportions geometries. The optimized geometry was characterized by a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>C</mi><mi>P</mi></msub></semantics></math></inline-formula> of 0.2948, which constitutes an increase of 10.8% in its performance compared to the profile without secondary elements and of 51.2% compared to the conventional semicircular profile. The numerical results were contrasted with experimental data obtained using a wind tunnel, revealing a good degree of fit.
format	article
author	Luis A. Gallo Edwin L. Chica Elkin G. Flórez Felipe A. Obando
author_facet	Luis A. Gallo Edwin L. Chica Elkin G. Flórez Felipe A. Obando
author_sort	Luis A. Gallo
title	Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
title_short	Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
title_full	Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
title_fullStr	Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
title_full_unstemmed	Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry
title_sort	numerical and experimental study of the blade profile of a savonius type rotor implementing a multi-blade geometry
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/76ff798fdda04a368645393937f57a2d
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Numerical and Experimental Study of the Blade Profile of a Savonius Type Rotor Implementing a Multi-Blade Geometry

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