S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Theses (Master's Degree_기계항공공학부)
Interaction of the elytra and hind wings of a rhinoceros beetle (trypoxylus dichotomus) during take-off : 이륙 비행 하는 장수풍뎅이의 겉날개-속날개 상호작용
- 공과대학 기계항공공학부
- Issue Date
- 서울대학교 대학원
- rhinoceros beetle ; flapping wing ; wing-wing interaction ; insect flight ; take-off mode ; vortical structures ; lift ; circulation
- 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2016. 2. 최해천.
- The elytra are a pair of hardened wings that cover the abdomen of a beetle to protect beetles hind wings. During take-off, these elytra open and flap in phase with the hind wings. We investigated the effect of the elytra flapping on the beetles aerodynamic performance. Numerical simulations are performed at Re=17,000 (based on the maximum velocity at wing tip and the mean chord length of the hind wing of a rhinoceros beetle during take-off) using an immersed boundary method. The simulations are focused on take-off, and the wing kinematics used are directly obtained from experimental observations using high speed cameras. The simulation results shows the three-dimensional vortical structures generated by the hind wing of the beetle and their interaction with the elytra. The presence of elytra has no effect on the lift generated by the hind wings, and the lift force on the elytra themselves is negligible.