Vortex dynamics and performance of a flexible plunging airfoil

James M. Akkala, Azar Eslam Panah, Brandon Goodman, James H J Buchholz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The kinematic and aerodynamic behaviors of plunging, flexible airfoils were investigated over a parameter space that was representative of birds and flapping MAVs. PIV was used to characterize the velocity fields about the airfoils as it oscillated in a sinusoidal manner, and subsequent vorticity contours were used to map out vortex evolution patterns and wake structures. Qualitative comparisons to a rigid airfoil were performed in order to identify the effects of airfoil deformation on the evolution of the vorticity field. A force transducer was used to determine lift and drag behavior throughout the airfoil's motion. The evolution of the vorticity fields generated by the flexible airfoils were found to adhere to the same categories of wake structures observed for the rigid airfoils, and were primarily dependent on reduced frequency, while aerodynamic loads were strongly correlated with Strouhal number. Finally, a scaling parameter was developed that provided excellent collapse of circulation values for the leading edge vortex within the parameter range investigated for each individual airfoil.

Original languageEnglish (US)
Title of host publication51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
StatePublished - 2013
Event51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013 - Grapevine, TX, United States
Duration: Jan 7 2013Jan 10 2013

Other

Other51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
CountryUnited States
CityGrapevine, TX
Period1/7/131/10/13

Fingerprint

airfoils
Airfoils
vorticity
vortex
Vortex flow
vortices
aerodynamics
Vorticity
transducer
drag
kinematics
wakes
bird
aerodynamic loads
Micro air vehicle (MAV)
flapping
Aerodynamic loads
Strouhal number
birds
parameter

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Akkala, J. M., Eslam Panah, A., Goodman, B., & Buchholz, J. H. J. (2013). Vortex dynamics and performance of a flexible plunging airfoil. In 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Akkala, James M. ; Eslam Panah, Azar ; Goodman, Brandon ; Buchholz, James H J. / Vortex dynamics and performance of a flexible plunging airfoil. 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013.
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Akkala, JM, Eslam Panah, A, Goodman, B & Buchholz, JHJ 2013, Vortex dynamics and performance of a flexible plunging airfoil. in 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013, Grapevine, TX, United States, 1/7/13.

Vortex dynamics and performance of a flexible plunging airfoil. / Akkala, James M.; Eslam Panah, Azar; Goodman, Brandon; Buchholz, James H J.

51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Akkala JM, Eslam Panah A, Goodman B, Buchholz JHJ. Vortex dynamics and performance of a flexible plunging airfoil. In 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013. 2013