LAPSE:2018.0613
Published Article
LAPSE:2018.0613
Computational Modeling of Gurney Flaps and Microtabs by POD Method
Unai Fernandez-Gamiz, Macarena Gomez-Mármol, Tomas Chacón-Rebollo
September 21, 2018
Gurney flaps (GFs) and microtabs (MTs) are two of the most frequently used passive flow control devices on wind turbines. They are small tabs situated close to the airfoil trailing edge and normal to the surface. A study to find the most favorable dimension and position to improve the aerodynamic performance of an airfoil is presented herein. Firstly, a parametric study of a GF on a S810 airfoil and an MT on a DU91(2)250 airfoil was carried out. To that end, 2D computational fluid dynamic simulations were performed at Re = 10⁶ based on the airfoil chord length and using RANS equations. The GF and MT design parameters resulting from the computational fluid dynamics (CFD) simulations allowed the sizing of these passive flow control devices based on the airfoil’s aerodynamic performance. In both types of flow control devices, the results showed an increase in the lift-to-drag ratio for all angles of attack studied in the current work. Secondly, from the data obtained by means of CFD simulations, a regular function using the proper orthogonal decomposition (POD) was used to build a reduced order method. In both flow control cases (GFs and MTs), the recursive POD method was able to accurately and very quickly reproduce the computational results with very low computational cost.
Keywords
flow control, Gurney flaps, microtabs, proper orthogonal decomposition, reduced order method, wind energy
Suggested Citation
Fernandez-Gamiz U, Gomez-Mármol M, Chacón-Rebollo T. Computational Modeling of Gurney Flaps and Microtabs by POD Method. (2018). LAPSE:2018.0613
Author Affiliations
Fernandez-Gamiz U: Nuclear Engineering and Fluid Mechanics Department, University Basque Country, UPV/EHU, 01006 Vitoria, Spain [ORCID]
Gomez-Mármol M: Department Ecuac Diferenciales & Anal Numer, Fac Mathematics, University Seville, 41012 Seville, Spain
Chacón-Rebollo T: Department Ecuac Diferenciales & Anal Numer, Fac Mathematics, University Seville, 41012 Seville, Spain; Instituto de Matemáticas Universidad de Sevilla (IMUS), University Seville, 41012 Seville, Spain
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Journal Name
Energies
Volume
11
Issue
8
Article Number
E2091
Year
2018
Publication Date
2018-08-11
Published Version
ISSN
1996-1073
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Original Submission
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PII: en11082091, Publication Type: Journal Article
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LAPSE:2018.0613
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doi:10.3390/en11082091
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Sep 21, 2018
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Sep 21, 2018
 
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Calvin Tsay
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