<![CDATA[This study is a continuation of previous research, with a special discussion on optimizing the aerodynamics of the NACA 2412 aerofoil by applying the morphing concept. The morphing aerofoil concept was selected because it can change shape as required, offering the potential for significant improvements in aerodynamic performance. This study focuses on optimizing the morphing aerofoil shape to achieve the maximum lift to drag ratio ( CL/CD) in each change of angle of attack. A Computational Fluid Dynamics (CFD) approach was used to simulate variations in speed and angle of attack to identify the most aerodynamically efficient morphing aerofoil configuration. The results of this study are expected to contribute to the development of morphing aerofoil designs that not only improve aerodynamic efficiency but also refine the concept design stage, so that the aerofoil is expected to be ideal and superior in its class. Overall, the simulation results show an aerodynamic performance that is in accordance with the theoretical expectations for the aerofoil configuration with a morphing NACA 2412 aerofoil. The morphing concept applied to the 2D airfoil section showed that its aerodynamic effectiveness strongly depends on the flight conditions, particularly the angle of attack. At 0° AoA, morphing the aft 30% of the chord provided a substantial aerodynamic benefit, boosting lift from Cl = 0.1990 to Cl = 1.3178 and improving Cl/Cd from 21.43 to 47.75, yielding a 122.76% increase. This is clearly reflected in the static pressure contours, where the morph-induced curvature strengthened the suction on the upper surface without causing large drag penalties. However, at higher AoAs (4°, 8°, and 12°), the morphing effect became progressively less efficient. Although the lift continues to increase after morphing, the drag increases at a much faster rate owing to stronger adverse pressure gradients and an earlier onset of pressure recovery distortion. As shown in the pressure contours, the altered aft section created additional pressure buildup near the trailing edge, causing a higher profile drag. Consequently, Cl/Cd decreased by 11.12%, 28.61%, and 13.26% at 4°, 8°, and 12°, respectively.]]>
