Next Article in Journal
A Novel Method for Estimating Wave Energy Converter Performance in Variable Bathymetry Regions and Applications
Next Article in Special Issue
Site Selection of Hybrid Offshore Wind and Wave Energy Systems in Greece Incorporating Environmental Impact Assessment
Previous Article in Journal
Partial Redesign of an Accelerator Driven System Target for Optimizing the Heat Removal and Minimizing the Pressure Drops
Previous Article in Special Issue
Effect of Zonal Hydraulics on Energy Consumption and Boom Structure of a Micro-Excavator
Open AccessArticle

Computational Modeling of Gurney Flaps and Microtabs by POD Method

Nuclear Engineering and Fluid Mechanics Department, University Basque Country, UPV/EHU, 01006 Vitoria, Spain
Department Ecuac Diferenciales & Anal Numer, Fac Mathematics, University Seville, 41012 Seville, Spain
Instituto de Matemáticas Universidad de Sevilla (IMUS), University Seville, 41012 Seville, Spain
Author to whom correspondence should be addressed.
Energies 2018, 11(8), 2091;
Received: 6 July 2018 / Revised: 7 August 2018 / Accepted: 10 August 2018 / Published: 11 August 2018
(This article belongs to the Special Issue 10 Years Energies - Horizon 2028)
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. View Full-Text
Keywords: wind energy; flow control; Gurney flaps; microtabs; proper orthogonal decomposition; reduced order method wind energy; flow control; Gurney flaps; microtabs; proper orthogonal decomposition; reduced order method
Show Figures

Graphical abstract

MDPI and ACS Style

Fernandez-Gamiz, U.; Gomez-Mármol, M.; Chacón-Rebollo, T. Computational Modeling of Gurney Flaps and Microtabs by POD Method. Energies 2018, 11, 2091.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop