Numerical and Experimental Simulations of Flapping Wings

Yuan, Weixing; Lee, Richard; Hoogkamp, Eric; Khalid, M.

doi:10.1260/1756-8293.2.3.181

Cited by 24 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The discrepancies of the results of the aerodynamic forces obtained on the three grids were minimal. The aerodynamic coefficients matched well starting from the second cycle (Yuan et al, 2010). Based on this observation, the results obtained from the medium grid will be discussed in this paper.…”

Section: Standard 2d Test Casesupporting

confidence: 58%

“…The computations were found to be time consuming and no time convergence study was performed. Since the Reynolds number was close to the one in the 2D test case, as many as 384 timesteps per flapping cycle were used to discretize the governing equations in time, which was confirmed to be sufficient for obtaining major features of the flow physics in the timestep refinement for the 2D test case reported in Yuan et al (2010). An upwind scheme was used for the discretization in space as the second-order scheme encountered numerical instabilities.…”

Section: Standard 3d Test Casementioning

confidence: 95%

“…The code has been used for a number of applications including largeeddy and unsteady Reynolds-averaged Navier-Stokes simulations (Yuan, Poirel, Wang, & Benaissa, 2014), low-Reynolds flows (Yuan, Khalid, Windte, Scholz, & Radespiel, 2007), laminar-separation flutter (Yuan, Poirel, & Wang, 2013), and flapping-wing aerodynamics (Yuan et al, , 2010.…”

Section: Description Of the In-house Cfd Solvermentioning

confidence: 99%

“…The work of the collaboration was introduced by Lesage et al (2008). The progress of NRC-Aerospace concerning its CFD contribution has been reported subsequently by and Yuan, Lee, Hoogkamp, and Khalid (2010). The detailed experimental setup and preliminary experimental results have been elaborated and presented by Lee, Yuan, Levasseur, and Hoogkamp (2011).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the further analyses of the finalized results of the single flapping airfoils and wings, the paper will present the contributions on multi-wing interaction known as the clap-fling effect (Ellington, 1984;Weis-Fogh, 1973). These results could help calibrations of panel codes as engineering tool to optimize wing shape and motion with rigid or flexible wings for NAVs (Yuan et al, 2010;Zdunich, 2010).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Experimental and computational investigations of flapping wings for Nano-air-vehicles

Yuan

Lee

Levasseur

2015

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

This paper presents the finalized results of a recent project which investigated the aeromechanical aspects of aerodynamic force generation by making use of flapping wings. Flapping-wing experiments using small wings have some unique challenges posed by the low force level ( ∼ 1 N) and the cyclic wing motion. A tailored experimental water tunnel facility was developed for flapping wings operating at high reduced frequency with a complex two-dimensional and a three-dimensional motion profile. The experimental capability is demonstrated by the test cases of two-dimensional and three-dimensional flapping wings, designed according to a proposed notional nano-air-vehicle at a hovering condition. The features of the water tunnel, the geometric and kinematic parameters of the airfoils/wings, and the setups of the motion rigs for each test case are described. Measured forces and particle image velocimetry data are analyzed and cross-checked with the numerical results obtained from a code developed in-house. The comparisons of the experimental and numerical results show that the established experimental approach obtained a quantitatively reliable solution for the development of flapping wings and can serve for numerical validation of engineering tool developments. The investigation reveals that the kinematics of a rigid airfoil or wing is the dominant influence in the generation of aerodynamic forces, while the cross-section profile plays a secondary role. An asymmetric-wake-in-time is found behind the single airfoils and wings, which contributes to an asymmetry behavior of the resulting aerodynamic forces. In addition to the findings of single airfoils and wings, further analyses of the numerical and experimental results confirm that wing-wing interaction through the clap-fling mechanism can intensify the generation of the thrust force while accompanied by a small reduction in the overall propulsion efficiency.

show abstract

Section: Standard 2d Test Casesupporting

confidence: 58%

Section: Standard 3d Test Casementioning

confidence: 95%

Section: Description Of the In-house Cfd Solvermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Experimental and computational investigations of flapping wings for Nano-air-vehicles

Yuan

Lee

Levasseur

2015

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

show abstract

Flexible Multi-Body Dynamics Modeling Methodology's for Flapping Wing Vehicles

Altenbuchner¹,

Hubbard²

2018

Modern Flexible Multi-Body Dynamics Modeling Methodology for Flapping Wing Vehicles

View full text Add to dashboard Cite

On the shape optimization of flapping wings and their performance analysis

Ghommem¹,

Collier²,

Niemi³

et al. 2014

Aerospace Science and Technology

View full text Add to dashboard Cite

The present work is concerned with the shape optimization of flapping wings in forward flight. The analysis is performed by combining a gradient-based optimizer with the unsteady vortex lattice method (UVLM). We describe the UVLM implementation and provide insights on how to select properly the mesh and time-step sizes to achieve invariant UVLM simulation results under further mesh refinement. Our objective is to identify a set of optimized shapes that maximize the propulsive efficiency, defined as the ratio of the propulsive power over the aerodynamic power, under lift, thrust, and area constraints. Several parameters affecting flight performance are investigated and their impact is described. These include the wing's aspect ratio, camber line, and curvature of the leading and trailing edges. This study provides guidance for shape design of engineered flying systems.

show abstract

Numerical and Experimental Simulations of Flapping Wings

Cited by 24 publications

References 20 publications

Experimental and computational investigations of flapping wings for Nano-air-vehicles

Experimental and computational investigations of flapping wings for Nano-air-vehicles

Flexible Multi-Body Dynamics Modeling Methodology's for Flapping Wing Vehicles

On the shape optimization of flapping wings and their performance analysis

Contact Info

Product

Resources

About