Faculty of Mechanical Engineering, Noshirvani Institute of Technology, Mazandaran University, Babol, Iran, P.O. Box 484.
*Corresponding author.
The presented work is calculating the effect of fluctuation flow around EPPLER E435 which is a high-lift, low Reynolds airfoil and S8035 which is symmetry, low Reynolds airfoil. An incompressible code is developed, employing a collocated grid arrangement. The central difference scheme, three level scheme and the standard k−ε turbulent model is used for the momentum equations, unsteady term and turbulence modeling respectively. Detailed comparisons between the effect of fluctuation flow around EPPLER E435 and S8035 airfoils are presented for the angle of attack of zero. The results show that the EPPLER E435 airfoil can produce more lift but a recalculating zone appears near the trailing edge when flow fluctuate, consequently the fluctuation of its lift coefficient is more than S8035 airfoil. The story is that the S8035 airfoil resists to stall phenomena because of its symmetry profile.
Turbulence, Fluctuation flow, S8035 airfoil, EPPLER E435 airfoil
