Simulation of Aerodynamic Performances of Flexible Flapping Wing Airfoils

WANG Qi; ZHU Yinxin; NIU Peixing; LIU Shaobao

doi:10.21656/1000-0887.430155

Volume 43 Issue 5

May 2022

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Article Navigation > Applied Mathematics and Mechanics > 2022 > 43(5): 586-596

WANG Qi, ZHU Yinxin, NIU Peixing, LIU Shaobao. Simulation of Aerodynamic Performances of Flexible Flapping Wing Airfoils[J]. Applied Mathematics and Mechanics, 2022, 43(5): 586-596. doi: 10.21656/1000-0887.430155

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Simulation of Aerodynamic Performances of Flexible Flapping Wing Airfoils

doi: 10.21656/1000-0887.430155

WANG Qi^{1, 2
,},
ZHU Yinxin^{1, 2},
NIU Peixing^{1, 2},
LIU Shaobao^{1, 2
,
,}

1.
State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China
2.
MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 21006, P.R.China

Received Date: 2022-05-05
Rev Recd Date: 2022-05-16

Available Online: 2022-05-26

Publish Date: 2022-05-01

Abstract

Abstract

Compared with fixed wings, the flapping wing has a significant aerodynamic performance advantage at low speeds and low Reynolds numbers, which draws more and more attentions. But most previous studies focus on rigid flapping airfoils, the aerodynamic performances of flexible flapping airfoils are still unclear. A fluid-solid coupling model for the flexible elliptical airfoils was developed to analyze the flow field around the airfoil, the airfoil deformation and the aerodynamic characteristics of airfoils, at different wind speeds and attack angles. Compared with the rigid airfoil, the flexible airfoil can delay the shedding time of the wake vortex and reduce the oscillation frequency of the disturbance on the lift force. The flexible airfoil significantly suppresses the disturbance of the wake flow and reduces the oscillation amplitude of disturbance. Even, the airfoil disturbance oscillation can be completely eliminated at an appropriate Young’s modulus of the airfoil. These results provide a theoretical guidance for the design of soft aircraft.
- flexible airfoil,
- fluid-solid coupling,
- aerodynamic performance,
- lift force,
- finite element

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References(12)

References

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