In the transonic regime, transonic buffet refers to the phenomenon in which shock waves oscillate at certain Mach numbers and angles of attack. This phenomenon can induce structural vibrations in the wing and is therefore a critical factor in aircraft design. While many previous studies have assumed a rigid wing, actual wings may experience elastic deformation and vibration, which can influence the buffet behavior. In this study, a fluid–structure interaction analysis is conducted on the transonic buffet phenomenon using a two-dimensional airfoil model with structural degrees of freedom. Specifically, the relationship between wing stiffness and buffet is investigated by varying the natural frequency of the airfoil. The results show that buffeting is suppressed when the airfoil has relatively high natural frequencies. FFT analysis indicates that this damping occurs in vibration modes where the natural frequencies of the airfoil interact with the buffet frequencies, suggesting a mechanism for buffet suppression through structural dynamics.
Seki et al. (Wed,) studied this question.