EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF THE SHAPE OF ICE OUTGROWTHS ON THE AERODYNAMIC CHARACTERISTICS OF THE WING

The results of experimental investigations of the aerodynamic characteristics of the wing of NACA 0012 profi le subjected to icing are presented. The ice accreted to the leading edge was simulated by appendages. The form and roughness of the outgrowths corresponded to the icing regimes typical of the formation of a glassy ice. Experiments were carried out in a wide range of angles of attack α = –4–18^o in an AT-4 low-speed wind tunnel of the Kharkov Aviation Institute on a wing of rectangular shape with elongation λ = 5 at the Reynolds number Re = 0.67·10⁶ and fl ow velocity V_∞ = 53 m/s. It is shown that in the cases considered, a change in the aerodynamic shape of the wing as a result of icing leads to a decrease in the lift force of the wing down to 50%, to a decrease in the angle of fl ow stalling to a value of α ~ 6^o , and to a considerable (several times) increase in the drag
   
Author:  A. A. Prikhod′ko, S. V. Alekseenko, and V. V. Chmovzh
Keywords:  wing, icing, wind tunnel, aerodynamic coeffi cients
Page:  486