Toygun DAGDEVİR, Nafiz KAHRAMAN, Orhan AKANSU

KANAT PROFİLLERİNİN DİKEY EKSENLİ BİR RÜZGÂR TÜRBİNİ PERFORMANSINA ETKİSİNİN SAYISAL İNCELENMESİ

Bu çalışmada, dikey eksenli bir rüzgar (DERT) türbini üzerine uygulanan aerodinamik kuvvetler ve enerji performansı, hesaplamalı akışkanlar dinamiği (HAD) programı kullanılarak incelenmiştir. Sayısal araştırma, NACA0021, NACA0015, NACA5520 ve CLARK-Y kanat profillerini kullanmak üzere, rüzgar türbinin performansını değerlendirmek amacıyla gerçekleştirilmiş ve bu dört kanat profili birbirleri ile karşılaştırılmıştır. Ansys-Fluent programı, Reynolds ortalamalı Navier-Stokes denklemlerini çözerek, DERT etrafındaki iki boyutlu kararsız akışı simule etmede kullanılmıştır. Sayısal sonuçlar göz önüne alındığında, NACA5520 kanat profili ilk hareketi sağlamak için kullanılabilirken, buna ek olarak ortalama olarak en yüksek güç katsayısı değeri NACA0021 profilinde elde edilmiştir.

NUMERICAL INVESTIGATION OF THE EFFECT OF BLADE AIRFOILS ON A VERTICAL AXIS WIND TURBINE Selahaddin

In this study, energy performance and aerodynamic forces acted on a vertical-axis Darrieus wind turbine(VAWT) have been examined by using computational fluid dynamics (CFD) program. Numerical investigation isconducted on a blade fixed pitch VAWT using NACA0021, NACA0015, NACA5520 and Clark-Y airfoils as a bladeprofile to assess its performance, and these four airfoils were compared with each other’s. Numerical simulation isdone for two-dimensional unsteady flow around the VAWT model by using Ansys-Fluent program which solvesReynolds averaged Navier-Stokes equations. Considered numerical results, NACA5520 can be employed to generatefirst movement; in addition, the maximum average power coefficient has been obtained for NACA0021.

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Yen J, Ahmed NA. Enhancing vertical axis wind turbine by dynamic stall control using synthetic jets, Journal of Wind Engineering and Industrial Aerodynamics, 2013; 114: 12-17.
Yan L, Yuan C, Yongjun H, Shengmao L, Kotaro T. Numerical simulation on the aerodynamic effects of blade icing on small scale Straight-bladed VAWT, Harbin, Physics Procedia, 2012; 24: 774-780.
Tjiu W, Marnoto T, Mat S, Ruslan MH and Sopian K. Darrieus vertical axis wind turbine for power generation I: Assessment of Darrieus VAWT configurations, Renewable Energy, 2015; 75: 50-67.
Wekesa DW, Wang C, Wei Y, Danao LAM. Influence of operating conditions on unsteady wind performance of vertical axis wind turbines operating within a fluctuating free-stream: A numerical study, Journal of Wind Engineering and Industrial Aerodynamics, 2014; 135: 76-89.
Tummala A, Velamati RK, Sinha DK, Indraha V, Krishna VH. A review on small scale wind turbines, Renewable and Sustainable Energy Reviews, 2016; 58: 1351-1371.
Saeidi D, Sedaghat A, Alamdari P, Alemrajabi AA. Aerodynamic design and economical evaluation of site specific small vertical axis wind turbines. Applied Energy. 2013; 101 : 765-775.
Scheurich F, Brown RE. Modelling the aerodynamics of vertical-axis wind turbines in unsteady wind conditions, Wind Energy, 2013; 16: 91-107.
Nobile R, Vahdati M, Barlow JF, CrookAM. Unsteady flow simulation of a vertical axis augmented wind turbine: A two-dimensional study, Journal of Wind Engineering and Industrial Aerodynamics, 2014; 125: 168–179.
Nini M, Motta V, Bindolino G, Guardone A. Threedimensional simulation of a complete Vertical Axis Wind Turbine using overlapping grids, Journal of Computational and Applied Mathematics, 2014; 270: 78–87.
Kishore RA, Priya S. Design and experimental verification of a high efficiency small wind energy portable turbine (SWEPT), Journal of Wind Engineering and Industrial Aerodynamics, 2013; 118 : 12–19.
Jin X, Zhao G, Gao K, Ju W. Darrieus vertical axis wind türbine: Basic research methods. Renewable and Sustainable Energy Reviews, 2015; 42: 212-225.
Internet-2, 2014, CFD-Online, k-epsilon Turbulence Model, http://www.cfd-online.com/Wiki/Realisable_kepsilon_model
Internet-1, 2014, Airfoil Tools, Airfoil 4 Digit Generator, http://airfoiltools.com/airfoil/naca4digit
Howell R, Qin N, Edwards J, Durrani N. Wind tunnel and numerical study of a small vertical axis wind turbine, Renewable Energy, 2010; 35: 412-422.
Horikiri K, Aerodynamics of wind turbines, A Thesis Submitted For The Degree Of Master Of Philosophy To The University Of London, London, 2011.
Guleren MK, Demir S. Performance analysis of different airfoils for wind turbine blades at low angles of attack, Journal of Thermal Science and Technology, 2011; 31-2: 51-59.
Frunzulica F, Dumitrescu H, Dumitrache A. A numerical investigation on the dynamic stall of a vertical axis wind turbine, Proc. Appl. Math. Mech, 2013; 13: 295-296.
Fluent Inc., Fluent User’s Manual. pp. 52, 54, 59, 71, 143, 2006.
Ferreiara CJS, van Zuijlen A, Bijl H, van Bussel G, van Kuik G. Simulating dynamic stall in a two-dimensional vertical-axis wind turbine: verification and validation with particle image velocimetry data, Wind Energy, 2009; 13: 1-17.
Castelli MR, Englaro A, Benini E. The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD, Energy, 2011; 36: 4919-4934.
Bhutta MMA, Hayat N, Farooq AU, Ali Z, Jamil SR, Hussain Z. Vertical axis wind turbine – A review of various configurations and design techniques, Renewable and Sustainable Energy Reviews, 2012; 16: 1926-1939.
Bergey B, Wind Energy History, Windpower.com, Oklahoma, 1997.