Hydrodynamic performance of a penguin wing: Effect of feathering and flapping

doi:10.1063/5.0147776

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Hydrodynamic performance of a penguin wing: Effect of feathering and flapping
	Hao ZZ(郝占宙); Yin B(银波); Prapamonthon, Prasert ; Yang GW(杨国伟)
刊名	PHYSICS OF FLUIDS
	2023-06-01
卷号	35 期号:6 页码:61907
ISSN号	1070-6631
DOI	10.1063/5.0147776
英文摘要	The penguin is the fastest underwater swimmer among the wing-propelled diving birds. To figure out the mechanism for its excellent swimming, the hydrodynamic performance of a penguin wing is numerically investigated using an immersed boundary method with the incompressible flow solver. This study examines the effects of feathering, flapping, and Strouhal number (St) under preset motion. Results indicate that feathering is the primary contributor to thrust generation. The change in angle of attack (AoA) can qualitatively reflect the change in lift but not thrust. Therefore, a new variable, angle of thrust (AoT, a(T)), is introduced to effectively reflect the change of thrust across different kinematic parameters. Optimal feathering amplitude balances the decrease in AoA and the increase in feathering angle to achieve the highest AoT and thrust. Excessive feathering amplitude degrades the leading-edge vortex to shear layers, transforms the pressure side to the suction side, and ultimately causes negative thrust (drag). Spatial analysis of the thrust shows that the outer three-fifths of the wing are the primary source of thrust, contributing 85.4% of thrust generation at optimal feathering amplitude. Flapping amplitude has little impact on the optimal feathering amplitude. The optimal feathering amplitude increases linearly with the St number in the scope of examination, leading to larger thrust but lower swimming efficiency. Thus, a dimensionless number, St(m), is introduced to describe the optimal wing motion. This work provides new insights into the propulsion mechanism of aquatic swimmers with flapping-feathering wings and helps design novel bio-inspired aquatic vehicles.
分类号	一类/力学重要期刊
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001015328400014
资助机构	King Mongkut's Institute of Technology Ladkrabang under the Academic Melting Pot program [KREF206501]
其他责任者	Yin, B (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China. ; Yin, B (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China. ; Prapamonthon, P (corresponding author), King Mongkuts Inst Technol Ladkrabang, Int Acad Aviat Ind, Dept Aeronaut Engn, Key Lab Comp Mech & Heat Transfer Applicat, Bangkok 10520, Thailand.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92587]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.{Hao, Zhanzhou, Yin, Bo, Yang, Guowei} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.{Hao, Zhanzhou, Yin, Bo, Yang, Guowei} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 3.{Prapamonthon, Prasert} King Mongkuts Inst Technol Ladkrabang, Int Acad Aviat Ind, Dept Aeronaut Engn, Key Lab Comp Mech & Heat Transfer Applicat, Bangkok 10520, Thailand
推荐引用方式 GB/T 7714	Hao ZZ,Yin B,Prapamonthon, Prasert,et al. Hydrodynamic performance of a penguin wing: Effect of feathering and flapping[J]. PHYSICS OF FLUIDS,2023,35(6):61907.
APA	郝占宙,银波,Prapamonthon, Prasert,&杨国伟.(2023).Hydrodynamic performance of a penguin wing: Effect of feathering and flapping.PHYSICS OF FLUIDS,35(6),61907.
MLA	郝占宙,et al."Hydrodynamic performance of a penguin wing: Effect of feathering and flapping".PHYSICS OF FLUIDS 35.6(2023):61907.