Influence of wing camber on aerodynamic performance of flapping wing rotor

Shao, Haoyuan; Li, Daochun; Kan, Zi; Li, Huadong; Yuan, Dian; Xiang, Jiawei

doi:10.1016/j.ast.2021.106732

Cited by 17 publications

(12 citation statements)

References 17 publications

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“…The pressure-based metho which is faster and has better convergence in solving a low-speed incompressible flo was used for the calculation. The turbulence model used the 𝑘 𝜔 SST model, which w validated in previous works as suitable for calculating low Reynolds number of 3D fla ping wing aerodynamics [23,24]. The total number of grids was approximately 1,500,00 The thickness of viscous boundary layer is ∼0.6 mm.…”

Section: Cfd Methodsmentioning

confidence: 99%

Numerical Analysis on the Aerodynamic Characteristics of an X-wing Flapping Vehicle with Various Tails

Tong

et al. 2022

Aerospace

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X-shaped flapping wings have excellent maneuverability and flight capabilities under low-Reynolds-number conditions. An appropriate tail can extend the range of a vehicle and improve its stability. This study takes two typical configurations, the inverted T-tail and the inverted V-tail, as the research object. Considering the wings’ flexible deformation in the flapping process, the computational fluid dynamics method was used to calculate the vehicles’ aerodynamic characteristics, taking into account the aerodynamic interaction effect of the wings and tail. The results show that the wake of flapping wings can significantly reduce the forward flight performance of the tails. The maximum L/D ratio of the two tails decreased by about 38%, and the static stability was also dramatically reduced in the forward flight. The inverted V-tail has better performance in fast forward flight, while the inverted T-tail had better control characteristics at low speeds. The relationship between the tail layouts and aerodynamic performance is also discussed. When the inverted V-tail is in the optimal position, the longitudinal control moment can be doubled in the hovering state. This research provides a reference for the design and arrangement of flapping wings with tails, which is beneficial to the performance improvement of vehicles.

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Section: Cfd Methodsmentioning

confidence: 99%

Numerical Analysis on the Aerodynamic Characteristics of an X-wing Flapping Vehicle with Various Tails

Tong

et al. 2022

Aerospace

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“…Flapping can be applied in various flow regimes to gain advantage in the overall efficiency of the wings and rotors of flying machines and turbine blades. The motion of birds and fish has been investigated in detail by previous researchers to make locomotion more efficient [ [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ]. Various researchers have studied the effects of airfoil shape on the aerodynamic performance of airfoils [ [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ].…”

Section: Introductionmentioning

confidence: 99%

“…The motion of birds and fish has been investigated in detail by previous researchers to make locomotion more efficient [ [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ]. Various researchers have studied the effects of airfoil shape on the aerodynamic performance of airfoils [ [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ]. A brief review of the previously published research work is presented in the following paragraphs.…”

Section: Introductionmentioning

confidence: 99%

Effect of the shape of flapping airfoils on aerodynamic forces

Butt,

Talha,

Khan

et al. 2024

Heliyon

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“…Recently, a new biomimetic layout of MAVs called a flapping wing rotorcraft (FWR) was proposed, and it has been proved to achieve higher lift and aerodynamic efficiency at low Reynolds number [5][6][7][8]. Compared with existing flapping wing robots [9][10][11], the wing is not installed symmetrically with respect to the horizontal plane but has an initial installation angle (similar to the collective angle) as shown in figure 1(A).…”

Section: Introductionmentioning

confidence: 99%

Design, modelling, and experimental validation of a self-rotating flapping wing rotorcraft with motor–spring resonance actuation system

Liu¹,

Song²,

Dong³

et al. 2023

Bioinspir. Biomim.

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Compared with traditional flapping motion, Flapping Wing Rotor (FWR) frees the rotating freedom by installing the two wings asymmetrically, which introduces rotor’s motion characteristics and enables FWR to have higher lift and aerodynamic efficiency at low Reynolds number. However, most of the proposed FWRs contain linkage mechanical transmission structures, the fixed degrees of freedom (DoFs) of which prohibit the wings from achieving variable flapping trajectories, limiting the further optimization and controller design of FWRs. In order to fundamentally address the above challenges of FWRs, this paper presents a new type of FWR with two mechanically decoupled wings, which are directly driven by two independent motor- spring resonance actuation systems. The proposed FWR has 12.4 grams of system weight and 165-205mm wingspan. In addition, a theoretical electromechanical model based on the DC motor model and quasi-steady aerodynamic forces is established, and a series of experiments are conducted in order to figure out the ideal working point of the proposed FWR. It is notable that both our theoretical model and experiments exhibit uneven rotation of the FWR during flight, i.e., rotation speed dropping in the downstroke while boosting in the upstroke, which further tests the proposed theoretical model and uncover the relationship between flapping and passive rotation in the FWR. To further validate the performance of the design, free flight tests are conducted, and the proposed FWR demonstrates stable liftoff at the designed working point.

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Influence of wing camber on aerodynamic performance of flapping wing rotor

Cited by 17 publications

References 17 publications

Numerical Analysis on the Aerodynamic Characteristics of an X-wing Flapping Vehicle with Various Tails

Numerical Analysis on the Aerodynamic Characteristics of an X-wing Flapping Vehicle with Various Tails

Effect of the shape of flapping airfoils on aerodynamic forces

Design, modelling, and experimental validation of a self-rotating flapping wing rotorcraft with motor–spring resonance actuation system

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