Analysis of Aerodynamic Characteristics of Airfoil with Variable Camber Based on ADHF and DND High Lift Devices

The significant advantages of variable camber technology in improving the aerodynamic performance of aircraft make it an important development direction for the aerodynamic design technology of large civil aircraft. This article takes the supercritical airfoil RAE2822 as the research object. Based on the current configurations of leading edge DND and trailing edge ADHF high-lift devices used in engineering, a parameterized method for continuous bending of the airfoil is established using real mechanism motion trajectories. The RANS method is used as the flow field evaluation method to analyze the aerodynamic characteristics of leading edge DND deflection, trailing edge flap deflection, and combined deflection, respectively. We explore the basic principle of drag reduction using variable camber technology and its impact on other aerodynamic characteristics of airfoils. The results indicate that the deflection of the leading edge DND and trailing edge flaps can effectively improve the shock drag of the airfoil and enhance the aerodynamic efficiency of the airfoil with strong shock waves. At the same time, the variable camber of the airfoil based on trailing edge deflection can improve the buffeting and drag divergence characteristics to a certain extent.