종방향 등줄기가 장수거북 모델의 공력성능에 미치는 영향

다국어 초록 (Multilingual Abstract)

Leatherback sea turtles (Dermochelys coriacea) are known as the fastest swimmer and the deepest diver in the open ocean among marine turtles. Unlike other marine turtles, leatherback sea turtles have five longitudinal ridges on their carapace. To investigate the effect of these longitudinal ridges on the aerodynamic performance of a leatherback turtle model, the experiment is conducted in a wind tunnel at Re = 1.0 × 10? - 1.4 × 10? (including that of real leatherback turtle in cruising condition) based on the model length. We measure the drag and lift forces on the leatherback turtle model with and without longitudinal ridges. The presence of longitudinal ridges increases both the lift and drag forces on the model, but increases the lift-to-drag ratio by 15 - 32 %. We also measure the velocity field around the model with and without the ridges using particle image velocimetry. Formation of vortex is observed due to the pressure difference between upper and lower surfaces of model. Strength of vortex is increased with the installation of ridge, resulting the increases in the drag and lift.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 방법
• 3. 결과 및 분석
• 4. 결론
• 참고문헌