Effect of Icing on Airfoil with Control Surface and Analysis of#br#
Aerodynamic Parameters

Abstract

Abstract:

Abstract： The aerodynamic character of an icedairfoil is closely related to the ice conformation, the effect of ice conformation on the flow field and the associated aerodynamic parameters of the elevator are unknown. In the present study, computational fluid dynamics (CFD) calculation was performed to simulate the flow features around an iced airfoil with control surface. Quantitative analyses were conducted to reveal the relations between the lift coefficient and the elevator deflection under various angles of attack. Comparison of the change rates of the lift coefficient with respect to the deflection angle was also given between the conditions of horn ice and ridged ice. The result indicate that related to a clean airfoil, the lift coefficient and its rate of change of an iced airfoil are severely degraded. The up wash effect induced by the downward deflection of the elevator aggravates the disturbance of the flow field caused by horn ice. In comparison with horn ice, flow over ridged ice separates more extensively in the upper surface of the tail, resulting in a smaller stall angle and a severe degradation of the derivative of lift coefficient to the deflection of the elevator. A threestep plunge of the relative aerodynamic derivative ratio is found to be a consequence of the increase of angle of attack and the elevator deflection for a hornice airfoil, while a twostep plunge with greater declination rates is observed for a ridgedice airfoil.

Key words: aircraft, icedairfoil, control surface deflection, separation flow, aerodynamic derivative

CLC Number:

V 211

LI Dong,ZHANG Chen,WANG Fuxin,LIU Hong. Effect of Icing on Airfoil with Control Surface and Analysis of#br# Aerodynamic Parameters[J]. Journal of Shanghai Jiaotong University, 2017, 51(3): 367-.

References

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Effect of Icing on Airfoil with Control Surface and Analysis of#br# Aerodynamic Parameters

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