Avian Wing Geometry and Kinematics

Liu, Tianshu; Kuykendoll, Kathryn; Rhew, Ray D.; Jones, Shirley M.

doi:10.2514/1.16224

Cited by 148 publications

(102 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Measurements of wing sections from recently deceased birds [2] suffer similar problems, according to how the wing is set. The measured profiles typically have very poor aerodynamic characteristics [1] and are unlikely to represent accurately the shape of the wing under aerodynamic loading, which can only be measured reliably from free-flying birds.…”

Section: Introductionmentioning

confidence: 99%

“…XFOIL is an open-source code [10] and is well recognized as a design and analysis tool for the optimization of 2D aerofoil sections [11,12]. It solves the potential equation using a second-order panel method with linear vortex variation distribution and a coupling between the external flowfield and viscous sub-layer.…”

Section: Xfoil Test Casesmentioning

confidence: 99%

“…It can, however, encounter problems when considering lower Reynolds number flows: although it is able to take into account laminar separation bubbles, it tends to under-predict the drag coefficient and overpredict the lift coefficients. Furthermore, if complete laminar separation occurs, then XFOIL is unable to converge [11][12][13].…”

Section: Xfoil Test Casesmentioning

confidence: 99%

See 2 more Smart Citations

Aerodynamics of aerofoil sections measured on a free-flying bird

Carruthers

Walker

Thomas

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

Abstract:Birds are adapted to a wide range of flight conditions, from steady fixed-wing glides to high angle of attack manoeuvres involving unsteady separated flows. They naturally control and exploit the transitional Reynolds number regime of Re ≈ 10 5 that is currently of interest in unmanned air vehicle technologies. This article presents a reconstruction of the inner portion of a wing of an eagle in free flight, during a rapid pitch-up manoeuvre at the end of a shallow glide to an elevated perch. Photogrammetric techniques were used to map the identified points on the wing and these were used to fit a mathematical model of the upper and lower surface topography using polynomial regression techniques. The surface model accounts for spanwise twist, spanwise bending, and varying chord distribution, as well as for the shape of the aerofoil. The aerodynamics of the two-dimensional aerofoil sections were analysed using XFOIL and were compared against two technical aerofoils, namely the Selig S1223 and Clark Y aerofoils, at 1 × 10 5 Re 2 × 10 5 . The bird aerofoil maintains a robust, near-constant drag coefficient over a wide lift coefficient range.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Xfoil Test Casesmentioning

confidence: 99%

See 1 more Smart Citation

Aerodynamics of aerofoil sections measured on a free-flying bird

Carruthers

Walker

Thomas

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

show abstract

“…In Figure 8a,t h e boundary between these parts is pointed out. A seagull-wing profile obtained by Liu et al [60] is used. The center line, contained in the plane of symmetry xz, does not move during the morphing process.…”

Section: Aerodynamics Of Morphing Wingsmentioning

confidence: 99%

Computational Aeroelasticity of Flying Robots with Flexible Wings

Preidikman¹,

Roccia²,

LeonardoVerstraete³

et al. 2017

Aerial Robots - Aerodynamics, Control and Applications

View full text Add to dashboard Cite

A computational co-simulation framework for flying robots with flexible wings is presented. The authors combine a nonlinear aerodynamic model based on an extended version of the unsteady vortex-lattice method with a nonlinear structural model based on a segregated formulation of Lagrange's equations obtained with the Floating Frame of Reference formalism. The structural model construction allows for hybrid combinations of different models typically used with multibody systems such as models based on rigid-body dynamics, assumed-modes techniques, and finite-element methods. The aerodynamic model includes a simulation of leading-edge separation for large angles of attack. The governing differentialalgebraic equations are solved simultaneously and interactively to obtain the structural response and the flow in the time domain. The integration is based on the fourth-order predictor-corrector method of Hamming with a procedure to stabilize the iteration. The findings are found to capture known nonlinear behavior of flapping-wing systems. The developed framework should be relevant for conducting aeroelastic studies on a wide variety of air vehicle systems.

show abstract

“…7 Airfoils -biological lifting surface (biological wings) [12], [13], [17], [21] Fig. 8 Stork wing [18], [19] According to the references and research in the field [14,15,20] we can identify aerodynamic airfoils similar to the biological ones, see Figure 9.…”

Section: Incas Bulletin Volume 9 Issue 3/ 2017mentioning

confidence: 99%

Flight Performance of the Biological Lifting Surface

Prisacariu¹

2017

INCAS BULLETIN

View full text Add to dashboard Cite

In the international research, biomimetic lifting surface are analyzed in various aspects: construction, aerodynamics and energy. The specificity of the flying wings determined similarity between the aeromechanical and the biomimetic concepts leading to numerous challenges in terms of construction, aerodynamics and actuation. The Aeromechanics of the biological flight focuses both on the various forms of lifting surfaces and the biomechanical aspects. This article contains a number of references to the biological inspiration of the morphing concept, a brief introduction to the theoretical area of the flying wings and a numerical analysis of biologically similar morphing geometry completed by conclusions and future approaches.

show abstract

Avian Wing Geometry and Kinematics

Cited by 148 publications

References 2 publications

Aerodynamics of aerofoil sections measured on a free-flying bird

Aerodynamics of aerofoil sections measured on a free-flying bird

Computational Aeroelasticity of Flying Robots with Flexible Wings

Flight Performance of the Biological Lifting Surface

Contact Info

Product

Resources

About