Numerical Study of Mechanisms of the Vortex Formation in the Wake of Dual-Flapping Foils

• 作者: Guoyi He Longsheng Chen Qi Wang Xingjian Lin Xinyi He
• 来源期刊: 应用数学与应用物理(英文)
• 学科: 物理学
• 关键词: VORTEX Formation DEFLECTION Dual-Flapping FOILS Immersed Boundary Method
• 年，卷（期）: 2017,（7）
• 页码范围: 1431-1439
• 页数: 9页
• 分类号: O35

摘要

The vortex formation and organization are the key to understand the intrinsic mechanism in flying and swimming in nature. The vortex wake of dual-flapping foils is numerically investigated using the immersed boundary method. Beside the deflection of the reversed von-Kármán vortex street, an interesting phenomenon, the deflection of the von-Kármán vortex street, is observed behind the dual-flapping foils. The deflected direction is not according to the initial direction of biplane’s flapping motion. And the deflection angle is related to the difference between upward and downward deflecting velocities.