Effect of Reynolds Number on Aerodynamics of Airfoil with Gurney Flap
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In this paper, the effect of variation in Reynolds number on the aerodynamics of the NACA 0012 airfoil without and with a Gurney flap of height of 3% chord is presented.Abstract:
Steady state, two-dimensional computational investigations performed on NACA 0012 airfoil to analyze the effect of variation in Reynolds number on the aerodynamics of the airfoil without and with a Gurney flap of height of 3% chord are presented in this paper. RANS based one-equation Spalart-Allmaras model is used for the computations. Both lift and drag coefficients increase with Gurney flap compared to those without Gurney flap at all Reynolds numbers at all angles of attack. The zero lift angle of attack seems to become more negative as Reynolds number increases due to effective increase of the airfoil camber. However the stall angle of attack decreased by 2° for the airfoil with Gurney flap. Lift coefficient decreases rapidly and drag coefficient increases rapidly when Reynolds number is decreased below critical range. This occurs due to change in flow pattern near Gurney flap at low Reynolds numbers.read more
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References
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Journal ArticleDOI
A new turbulence model for predicting fluid flow and heat transfer in separating and reattaching flows—I. Flow field calculations
TL;DR: In this paper, the Kolmogorov velocity scale was introduced to account for the near-wall and low-Reynolds-number effects in both attached and detached flows.
Journal ArticleDOI
Design of Subsonic Airfoils for High Lift
TL;DR: In this article, the authors defined the upper surface lift coefficient of an airfoil chord and defined the freestream conditions at the leading edge of the chord line, and the ratio of specific heats.
Journal ArticleDOI
Experimental Studies of Separation on a Two-Dimensional Airfoil at Low Reynolds Numbers
TL;DR: In this paper, the laminar separation, transition, and turbulent reattachment near the leading edge of a two-dimensional NACA 663 -018 airfoil were investigated using a low-speed, smoke visualization wind tunnel.
Journal ArticleDOI
Gurney flap—Lift enhancement, mechanisms and applications
TL;DR: A review of the characteristics and mechanisms of lift enhancement by the Gurney flap and its applications can be found in this article, where the authors also discuss the application of the GURNey flap to modern aircraft design.