Streamwise ram effect and tip vortex enhance the lift of a butterfly-inspired flapping wing
文献类型：期刊论文
| 作者 | Chen, Yixin1,2; Liu, Yi1,2 ; Wang, Shizhao1,2
|
| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2025-02-26 |
| 卷号 | 1005页码:39 |
| 关键词 | swimming/flying |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2024.1199 |
| 通讯作者 | Wang, Shizhao(wangsz@lnm.imech.ac.cn) |
| 英文摘要 | Although both butterflies and dragonflies are four-winged insects, their wing geometries and kinematics differ significantly. Butterflies have a much narrower gap between their forewing and hindwing than dragonflies. While previous research has extensively investigated the forewing-hindwing interactions in dragonfly flight, this work focuses on their interactions in butterfly flight. The interactions are studied based on numerical simulations of the Navier-Stokes equations around a butterfly-inspired flapping wing with an adjustable slot, representing the narrow gap between the forewing and hindwing. The slot is controlled by a dihedral angle between the forewing and hindwing. The lift coefficients of wings with different slot sizes and locations are investigated in detail. The results show that the forewing-hindwing interactions can significantly enhance the lift if the slot is properly configured. When the slot is configured by elevating the forewing at a 10-degree dihedral angle relative to the hindwing during flapping flight, the wing generates over 20 % more lift than the model without a slot. The streamwise ram effect and tip-vortex capture are shown to be responsible for the lift enhancement by using a lift decomposition formula. The streamwise ram effect reduces the streamwise velocity beneath the forewing, decreasing the negative vortex lift associated with spanwise vorticity. The tip-vortex capture enhances the positive vortex lift associated with streamwise vorticity when the hindwing captures the tip vortex shedding from the forewing. |
| WOS关键词 | GLIDING BIRDS ; FLIGHT ; PERFORMANCE ; REDUCTION ; MECHANISM ; THRUST ; INSECT ; SLOTS ; HAWK ; DRAG |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001435741700001 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/100205]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Wang, Shizhao |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yixin,Liu, Yi,Wang, Shizhao. Streamwise ram effect and tip vortex enhance the lift of a butterfly-inspired flapping wing[J]. JOURNAL OF FLUID MECHANICS,2025,1005:39. |
| APA | Chen, Yixin,Liu, Yi,&Wang, Shizhao.(2025).Streamwise ram effect and tip vortex enhance the lift of a butterfly-inspired flapping wing.JOURNAL OF FLUID MECHANICS,1005,39. |
| MLA | Chen, Yixin,et al."Streamwise ram effect and tip vortex enhance the lift of a butterfly-inspired flapping wing".JOURNAL OF FLUID MECHANICS 1005(2025):39. |
入库方式： OAI收割
来源：力学研究所
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