Comparison of CFD and XFOIL Airfoil Analyses for Low Reynolds Number

Onur Gunel, Emre Koc, Tahir Yavuz

Abstract


Blade Element Momentum (BEM) theory is generally used technique for calculation of aerodynamic performance of such turbine application. To obtain close results with blade element momentum theory, aerodynamic data of airfoil has to be as correct as possible. Nowadays, Computational Fluid Dynamics (CFD) is used for optimization and design of turbine application. Lift coefficient, drag coefficient and Lift coefficient over drag coefficient are significant parameters for turbine application. Panel method and an integral boundary layer formulation are combined in the XFOIL code for the analysis of potential ?ow around the airfoils. In this study, XFOIL code, Transition SST k-omega model was used to predict the aerodynamic performance at low Reynolds number (Re=3x105 and 4x105). The results were compared and CFD results and XFOIL code result are compatible with each other until stall angle. Also, lift coefficient over drag coefficient was tried to optimize by changing the airfoil geometry.


Keywords


Xfoil; Computational Fluid Dynamics (CFD); Transition SST k-omega model; low reynold number;

Full Text:

PDF

References


H. Glauert, “The Elements of Aerofoil and Airscrew Theory,” Cambridge Science Classics, 1983.

K. S. Patel, S. B. Patel, U. B. Patel, et al. “CFD Analysis of an Aerofoil,” International Journal of Engineering Research., Vol.3, Issue No.3,2014, pp : 154-158.

M. Drela, “An Analysis and Design System for Low Reynolds Number Airfoils,” MIT Dept. of Aeronautics and Astronautics, Lecture Notes in Engineering, Vol. 54, 1989, pp. 1-12.

C. A. L. Lyon, A. P. Broeren, P. Giguere, A. Gopalarathnam, M. S. Selig, “Summary of Low-Speed Airfoil Data,” University of Illinois, Dept. of Aeronautical and Astronautical Engineering, Soartech Publications, Vol. 3, 1997.

P. Giguere, M. S. Selig, “New Airfoils for Small Horizontal Axis Wind Turbines,” Solar Energy Engineering, 1998, pp. 108-114.

Hua X, Gu R, Jin J, Liu Y, Ma Y, Cong Q, et al. “Numerical Simulation And Aerodynamic Performance Comparison Between Seagull Airfoil and NACA 4412 Airfoil Under Low-Reynolds,” Adv. Nat. Sci., Vol. 3, No. 2, 2010, pp. 244-250.

T. Yavuz, E. Koç, B. K?lk??, Ö. Erol, Can Balas, T. Aydemir, “Performance analysis of the airfoil-slat arrangements for hydro and wind turbines applications,” Renew. Energy, 74 (414), 2015, pp. 414-421.


Refbacks

  • There are currently no refbacks.


ISSN 2548 - 060X

@ 2013

 Publisher: Ilker Ors