Abstract
When the aircraft flies through rain or clouds, supercooled water droplets or cloud particles cause aircraft icing by impinging on the surface of the aircraft. Accreted ice causes a change in the shape of the wing, negatively affects aerodynamic characteristics, and is a direct threat to safe flight. In this study, the effect of icing on the aerodynamic performance of medium-sized transport aircraft was analyzed by computational simulation. The iced area attached to the leading edge of the main wing and the tail wing was observed to be up to 5.3 cm. In addition, the reduction in aerodynamic performance was more considerable in the glaze ice condition due to the complicated geometry of ice. As a result of the study, the effect of icing on the lift and drag coefficient was investigated. The lift coefficient decreased by approximately 20% and the drag coefficient increased by approximately 70%. This suggests that icing will have a negative effect on the cruising range and endurance, which are important performances of medium-sized transport aircraft. In the future, this study can be extended to studies on the effects of ice accretion and design of ice protection systems.
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