추진력 생성을 위한 가오리 날개 짓에 관한 유체-구조연성 수치 해석 연구

There have been recent attentions in the development of bio-mimetic underwater vehicles in order to emulate the characteristics and performances of marine fishes and mammals. The present study deals with the motions of Batoid (i.e. Manta ray) that has excellent capabilities in cruise and maneuverability during the underwater movement. The velocity and moving distance derived from its fin movement is numerically studied. A Fluid-Structure Interaction method is used to conduct the 3-D time-dependent numerical analysis, wherein the adaptive mesh is employed for the consideration of the large deformation of a fin interacted with fluids. The preliminary study shows that the thrust of a ray fin is highly affected by the frequency. After the fin amplitude for the thrust generation is obtained under actual ray conditions, optimal frequency and amplitude values for the maximum thrust are explored as well.