Experimental investigation of fluid–structure interaction in a bird-like flapping wing

Deshpande, Parag; Modani, Amrut

doi:10.1016/j.jfluidstructs.2019.102712

Cited by 9 publications

(8 citation statements)

References 29 publications

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“…Thus the mean is found to increase with a decrease in the panel chord length. Interestingly, Deshpande & Modani (2019) noted the trend of increased with an increase in flapping frequency for moderately flexible wing configurations. Thus the effect of an increase in frequency or a decrease in chord is seen to be the same, because the tangential velocity is a function of both the chord and frequency .…”

Section: Resultsmentioning

confidence: 99%

Kinematics and dynamics of pitching flexible panels in a quiescent fluid

Deshpande

Vishwasrao

2021

J. Fluid Mech.

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Section: Resultsmentioning

confidence: 99%

Kinematics and dynamics of pitching flexible panels in a quiescent fluid

Deshpande

Vishwasrao

2021

J. Fluid Mech.

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“…Moreover, Deshpande et al evaluated the dynamics of four flapping wings made of different materials with different deformation capabilities through phase-lock 2D PIV measurements [133]. Their results suggested that the wing stiffness and deformation, especially the trailing edge deformation, played essential roles in thrust generation.…”

Section: Devices For Visualizing Wing Deformation Effectsmentioning

confidence: 99%

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Zhang¹,

Zhao

2022

Bioinspir. Biomim.

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Traditional flapping-wing robots (FWRs) obtain lift and thrust by relying on the passive deformation of their wings which cannot actively fold or deform. In contrast, flying creatures such as birds, bats, and insects can maneuver agilely through active folding or deforming their wings. Researchers have developed many bio-inspired foldable or deformable wings (FDWs) imitating the wings of flying creatures. The foldable wings refer to the wings like the creatures’ wings that can fold in an orderly manner close to their bodies. Such wings have scattered feathers or distinct creases that can be stacked and folded to reduce the body envelope, which in nature is beneficial for these animals to prevent wing damage and ensure agility in crossing bushes. The deformable wings refer to the active deformation of the wings using active driving mechanisms and the passive deformation under the aerodynamic force, which functionally imitates the excellent hydrodynamic performance of the deformable body and wings of the creatures. However, the shape and external profile changes of deformable wings tend to be much smaller than that of folding wings. FDWs enable the FWRs to improve flight degree of flexibility, maneuverability, and efficiency and reduce flight energy consumption. However, FDWs still need to be studied, and a comprehensive review of the state-of-the-art progress of FDWs in FWR design is lacking. This paper analyzes the wing folding and deformation mechanisms of the creatures and reviews the latest progress of FWRs with FDWs. Furthermore, we summarize the current limitations and propose future directions in FDW design, which could help researchers to develop better FWRs for safe maneuvering in obstacle-dense environments.

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“…The above equation is used to obtain the aerodynamic force for a single wing and a given flapping frequency range. Number of wings N used as a multiplication factor to get the AF for the actual flapping-wing configuration during comparison (N = 2 for NAL flapper [23] and Golden snitch [37] and ; 4 for DelflyII [38]). In general, this component of AF was as a thrust force and the thrust generation in a flapping wing is considered analogous to that of a rotary wing where in the latter case, the thrust force varies with a square of propeller RPM.…”

Section: Validationmentioning

confidence: 99%

Correlations between flexural stiffness, wingbeat frequency and aerodynamic force generation in hovering insect flight

Deshpande

2022

Eng. Res. Express

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We report a direct relationship between wing flexural stiffness, wingbeat frequency, and mean aerodynamic force generation based on the wing morphological database for various insect species in hovering flight condition. Proposed correlations have shown the potential to predict the minimum aerodynamic force generation in flapping wings for a given flapping frequency with reasonable accuracy. The robustness of these correlations is demonstrated by validating them against the available experimental data for the various artificial flapping-wing configurations. These regression models can be used as first-order design tools which will save computational and experimental time while developing flapping-wing drones (FWD).

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Experimental investigation of fluid–structure interaction in a bird-like flapping wing

Cited by 9 publications

References 29 publications

Kinematics and dynamics of pitching flexible panels in a quiescent fluid

Kinematics and dynamics of pitching flexible panels in a quiescent fluid

Bio-inspired flapping wing robots with foldable or deformable wings: a review

Correlations between flexural stiffness, wingbeat frequency and aerodynamic force generation in hovering insect flight

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