Improvement of the aerodynamic performance by wing flexibility and elytra–hind wing interaction of a beetle during forward flight

Le, Tuyen Quang; Truong, Tien Van; Park, Soo Hyung; Truong, Tri Quang; Ko, Jin Hwan; Park, Hoon Cheol; Byun, Doyoung

doi:10.1098/rsif.2013.0312

Cited by 65 publications

(84 citation statements)

References 39 publications

(44 reference statements)

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“…Taken together, the wings with the better camber performance presented the higher lift/power, which means less energy consumption, with neglecting the effects of AOA. It should be noted here that previous studies have reported an impressive improvement of efficiency for the flexible insect wings [6,10,31,44]. These results are consistent with the role of wing flexibility.…”

Section: Force Generationsupporting

confidence: 81%

“…Wing flexibility is believed to be a key factor for the aerodynamic performance of insect flight [5]. Wing interaction characteristics and flexibility during the flapping motion are primary issues because they are believed to be the main reasons for the best aerodynamic performance of a flying insect [6]. A recent investigation of the effect of wing camber deformations on aerodynamic performance shows that wing deformations are important for enhancing efficiency [7].…”

Section: Introductionmentioning

confidence: 99%

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Bio-Inspired Flexible Flapping Wings with Elastic Deformation

2017

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Abstract:Over the last decades, there has been great interest in understanding the aerodynamics of flapping flight and development of flapping wing Micro Air Vehicles (FWMAVs). The camber deformation and twisting has been demonstrated quantitatively in a number of insects, but making artificial wings that mimic those features is a challenge. This paper reports the development and characterization of artificial wings that can reproduce camber and twisting deformations. By replacing the elastic material at the wing root vein, the root vein would bend upward and inward generating an angle of attack, camber, and twisting deformations while the wing was flapping due to the aerodynamic forces acting on the wing. The flapping wing apparatus was employed to study the flexible wing kinematics and aerodynamics of real scale insect wings. Multidisciplinary experiments were conducted to provide the natural frequency, the force production, three-dimensional wing kinematics, and the effects of wing flexibility experienced by the flexible wings. The results have shown that the present artificial wing was able to mimic the two important features of insect wings: twisting and camber generation. From the force measurement, it is found that the wing with the uniform deformation showed the higher lift/power generation in the flapping wing system. The present developed artificial wing suggests a new guideline for the bio-inspired wing of the FWMAV.

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Section: Force Generationsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Bio-Inspired Flexible Flapping Wings with Elastic Deformation

2017

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“…A numerical study (Young et al, 2009) with realistic wing shapes based on the high-speed photogrammetry suggested that the twist and camber can enhance the aerodynamic efficiency of the forward flight of locusts. Similar benefits of the wing deformation have been confirmed in the flight of butterflies or beetles in spite of the great differences in flight morphology (Le et al, 2013;Zheng et al, 2013).…”

Section: Introductionsupporting

confidence: 52%

Fluid-structure interaction enhances the aerodynamic performance of flapping wings: a computational study

Nakata

Noda

Líu

2018

JBSE

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Insect wings change its shape passively by the aerodynamic and inertial forces when flapping, which can greatly affect its aerodynamic performances. In order to confirm the importance of the fluid-structure interaction in flapping wing aerodynamics, we performed computational fluid-structure interaction analyses of a hovering hawkmoth with 'virtual' vacuum conditions that can adjust the effect of the aerodynamic force on the deformation of flapping wings. It is turned out that the large part of the wing deformation, such as the wing twist, is induced by the inertial force as reported previously, but the adjustment of the wing deformation by the aerodynamic force can greatly affect the kinematics and the aerodynamics of flapping wings. While the wing deformation, regardless of the contribution of the aerodynamic force, can increase the aerodynamic power, force and efficiency of flapping wings, the wing deformation adjusted in response to the unsteady aerodynamics of flapping wings can further enhance the aerodynamic performance. These results not only reveal the influence of the wing deformation on the aerodynamic performance of flapping wings, but also point out the great importance of the fluid-structure interaction in the aerodynamics of insect flight and the design of bio-inspired micro aerial vehicles.

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“…Although flow visualizations on free and tethered dragonflies have shown some similar properties [12], the tethered flights can nevertheless convincingly reproduce the scenarios of free flight [13], in both kinematics [14] and force generation [15]. Hence, studies on the aerodynamics of insects in free flight are consistently pursued [16][17][18][19][20][21][22][23][24]. It has been pointed out that insects generate forces through a quite complex combination of aerodynamic mechanisms, including wake capture, active and inactive upstrokes, clap and fling, and LEV.…”

Section: Introductionmentioning

confidence: 99%

Computational investigation of cicada aerodynamics in forward flight

Wan

Dong

Gai

2015

J. R. Soc. Interface.

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Free forward flight of cicadas is investigated through high-speed photogrammetry, three-dimensional surface reconstruction and computational fluid dynamics simulations. We report two new vortices generated by the cicada's wide body. One is the thorax-generated vortex, which helps the downwash flow, indicating a new phenomenon of lift enhancement. Another is the cicada posterior body vortex, which entangles with the vortex ring composed of wing tip, trailing edge and wing root vortices. Some other vortex features include: independently developed left-and right-hand side leading edge vortex (LEV), dual-core LEV structure at the mid-wing region and nearwake two-vortex-ring structure. In the cicada forward flight, approximately 79% of the total lift is generated during the downstroke. Cicada wings experience drag in the downstroke, and generate thrust during the upstroke. Energetics study shows that the cicada in free forward flight consumes much more power in the downstroke than in the upstroke, to provide enough lift to support the weight and to overcome drag to move forward.

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Improvement of the aerodynamic performance by wing flexibility and elytra–hind wing interaction of a beetle during forward flight

Cited by 65 publications

References 39 publications

Bio-Inspired Flexible Flapping Wings with Elastic Deformation

Bio-Inspired Flexible Flapping Wings with Elastic Deformation

Fluid-structure interaction enhances the aerodynamic performance of flapping wings: a computational study

Computational investigation of cicada aerodynamics in forward flight

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