In this study, shape optimization of a corrugated wing, inspired by the structure of dragonfly wings, was conducted using the adjoint variable method to enhance lift performance. Previous studies showed that sensitivity tended to concentrate at the leading and trailing edges, resulting in flap-like structures. To address this, the present work focused on the inflection points of the corrugations, selectively modifying their positions based on computed sensitivity values. Forward simulations demonstrated that the total time-integrated lift increased by approximately 15% compared to the initial shape. Comparative analysis of pressure and vorticity contours revealed that the development of a strong low-pressure region and the formation of Λ-shaped vortices near the center of the wing contributed significantly to lift enhancement. These results suggest that localized shape control at the inflection points is effective for optimizing corrugated wings under low Reynolds number conditions.
HORIKAWA et al. (Wed,) studied this question.
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