Fluid-structure interaction simulation for multi-body flexible morphing structures

• Published in: Chinese journal of aeronautics 2024-02, Vol.37 (2), p.137-147
• Main Authors: GUO, Wenzhi, SHUI, Yongtao, NIE, Lu, CHEN, Gang
• Format: Article
• Language: English
• ISSN: 1000-9361
• DOI: 10.1016/j.cja.2023.09.009

The multi-body flexible morphing airfoil can improve the aerodynamic characteristics based on different flight missions continuously.Recently researches have focused on the unsteady aerodynamic characteristics of flexible wings under passive actuation.However,the unsteady aero-dynamic characteristics with the fluid-structure interaction effects in the multi-body active actua-tion process of morphing airfoil deserve further investigation.In this paper,a fluid-structure coupled simulation method for multi-body flexible morphing airfoil with active actuation subsystem was investigated,and the aerodynamic characteristics during deformation were compared with dif-ferent skin flexibility,flow field environment,actuation mode and actuation time.The numerical results show that for the steady aerodynamic,the skin flexibility can improve the stability efficiency.In the unsteady process,the change trend of the transient lift coefficient and pitching moment are consistent with those of the active drive characteristics,while the instantaneous lift-drag ratio coef-ficient is greatly affected by the driving mode and can be improved by increasing the driving dura-tion.