A simulation of the flight characteristics of the deployable hindwings of beetle

Sun, Jiyu; Du, Ruijuan; Liu, Xiaofeng; Bechkoum, Kamal; Chen, Donghui

doi:10.1016/s1672-6529(16)60392-x

Cited by 10 publications

(7 citation statements)

References 37 publications

(35 reference statements)

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“…This turbulence model combines the Wilcox k-ω model and k-ε model by blending functions, using the k-ω model in the near wall region and using the k-ε model in the far field. Therefore it is an effective blend of the high simulation accuracy for separation flow of the k-ω model and the low sensitivity to initial turbulence parameters of the k-ε model, and one of the most widely used turbulence models [21]- [24]. The studies of Ref.…”

Section: B Computational Setup For Cfdmentioning

confidence: 99%

Aerodynamic Characteristics and Pitching Adjusting Mechanism of the Flying Squirrel With Deployed Patagium

et al. 2019

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The flying squirrel has a balanced amphibious ability on land and air, especially the ability to glide using their patagium, which makes it an excellent biomimetic object in the design and development of multimodal locomotion robots. This paper presents the study of aerodynamic characteristics and pitching adjusting mechanism of the flying squirrel with deployed patagium. A 3D geometric model of the flying squirrel with unfolded wing membrane was obtained using 3D scanning technique. Then a simulation analysis based on computational fluid dynamics software and a wind tunnel experiment on the animal specimen were carried out to analyze and evaluate the aerodynamic characteristics. After that, the pitching adjusting mechanism of flying squirrels during gliding was numerical simulated by establishing the pitching dynamics model. The results from above research not only enrich our understanding of gliding mechanism of flying squirrels, but also provide important biological inspiration for the design and development of multimodal robots in the future.INDEX TERMS Gliding, aerodynamic characteristics, pitching adjusting, patagium, flying squirrel, bioinspiration.

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Section: B Computational Setup For Cfdmentioning

confidence: 99%

Aerodynamic Characteristics and Pitching Adjusting Mechanism of the Flying Squirrel With Deployed Patagium

et al. 2019

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“…28 Furthermore, the UVLM simply requires the description of the zero-thickness wing surface for aerodynamic calculations, in contrast to other CFD (computational fluid dynamics) solvers which additionally require a fluid domain. 21,29 The UVLM is acceptable for scenarios involving small angles of attack 30 and is based on the assumption that the airflow around the wing is incompressible, irrotational, and inviscid. These assumptions remain valid for the application of interest.…”

Section: Unsteady Vortex Lattice Methodsmentioning

confidence: 99%

Unsteady aerodynamic analysis and effectiveness of bio-inspired flapping wings in V-formation flight

Billingsley

Ghommem

Vasconcellos

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Several bird species have been observed to fly in V-formation, an arrangement which exploits aerodynamic features to allow the group to conserve energy when migrating over long distances without stopping and feeding. The use of such grouping arrangement and organized pattern has demonstrated longer endurance and less power consumption in comparison with single flights. In this work, a computationally efficient potential flow solver based on the unsteady vortex lattice method (UVLM) is employed to assess the aerodynamic performance of flapping wings in forward flight in terms of lift and thrust generation along with the propulsive efficiency. The UVLM has the capability to simulate incompressible and inviscid flows over moving thin wings where the separation lines are known a priori. A bio-inspired, albatross wing shape is considered and its aerodynamic performance in formation flights is compared against conventional elliptical and rectangular wing shapes. The aerodynamic analysis is carried out for different wing arrangements of 3-body and 5-body V-formations to determine the optimal spacing parameters leading to maximum propulsive efficiency. The simulation results reveal that, at the optimal formation angle and separation distance, the albatross-inspired wing shape produces the most lift over the flapping cycle, while the rectangular wing shape generates the most thrust over the flapping cycle. Furthermore, the optimal configuration in terms of propulsive efficiency is found to be a 5-body V-formation utilizing the albatross wing shape with a separation distance set to one-third of the span and a formation angle set to 139°. The present study provides guidance for the design of multi-flapping wing air vehicles based on the expected flight mission. The albatross wing shape is found to have superior capability in producing lift, while the elliptical wing shape is observed to consume less power. The rectangular wing shape is found to produce higher thrust and then can achieve faster forward motion.

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“…The shape and size of the bionic model determine that the flight of C. buqueti belongs to an incompressible fluid, and the cuboid is selected as the computational domain. The lengths of approximately 5-10 times wing or 10-20 times mean chord of insects are often taken as the reference to determine the calculation domain [33,34]. In this study, the dimension of the computational domain is 0.3 m in length (approximately 7 times elytron length), 0.36 m in width (approximately 8 times elytron length) and 0.22 m in height (approximately 5 times elytron length).…”

Section: Numerical Simulation Of the Elytra Flappingmentioning

confidence: 99%

Functional characteristics of the rigid elytra in a bamboo weevil beetle Cyrtotrachelus buqueti

Li¹,

Yu²

2022

IET Nanobiotechnology

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The bamboo weevil beetle, Cyrtotrachelus buqueti, has evolved a particular flight pattern. When crawling, the beetle folds the flexible hind wings and stuffs under the rigid elytra. During flight, the hind wings are deployed through a series of deployment joints that are passively driven by flapping forces. When the hind wings are fully expanded, the unfolding joint realises self-locking. At this time, the hind wings act as a folded wing membrane and flap simultaneously with the elytra to generate aerodynamics. The functional characteristics of the elytra of the bamboo weevil beetle were investigated, including microscopic morphology, kinematic properties and aerodynamic forces of the elytra. In particular, the flapping kinematics of the elytra were measured using high-speed cameras and reconstructed using a modified direct linear transformation algorithm. Although the elytra are passively flapped by the flapping of the hind wings, the analysis shows that its flapping wing trajectory is a double figure-eight pattern with flapping amplitude and angle of attack. The results show that the passive flapping of elytra produces aerodynamic forces that cannot be ignored. The kinematics of the elytra suggest that this beetle may use well-known flapping mechanisms such as a delayed stall and clap and fling. K E Y W O R D S3D reverse reconstruction, aerodynamic force, bio-inspired structures, microstructure, wing kinematicsThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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A simulation of the flight characteristics of the deployable hindwings of beetle

Abstract: The University of Gloucestershire accepts no liability for any infringement of intellectual property rights in any material deposited but will remove such material from public view pending investigation in the event of an allegation of any such infringement.

Cited by 10 publications

References 37 publications

Aerodynamic Characteristics and Pitching Adjusting Mechanism of the Flying Squirrel With Deployed Patagium

Aerodynamic Characteristics and Pitching Adjusting Mechanism of the Flying Squirrel With Deployed Patagium

Unsteady aerodynamic analysis and effectiveness of bio-inspired flapping wings in V-formation flight

Functional characteristics of the rigid elytra in a bamboo weevil beetle Cyrtotrachelus buqueti

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