Investigation of accelerating non-slender delta-wing planforms at high angle of attack using lagrangian coherent structures

Han Tu, Matthew Marzanek, Melissa A. Green, David E. Rival

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


A proper understanding of vorticity production, reorientation, and annihilation around and in the wake of complex three-dimensional bodies such as unmanned combat air vehicles (UCAVs) would provide critical insight for effective flow-control development in unsteady environments. Force measurement, surface pressure measurement, and time-resolved planar flow visualization at high Reynolds number for steady and unsteady translations have been carried out on a NACA 0012 airfoil wing with triangular planform geometry. At high angles of attack, the flow field exhibits sensitivity to axial acceleration when initially separated across the midspan. Flow field data analysis included a finite-time Lyapunov exponent analysis shows a topological change in the coherent structure during different axial accelerations.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
StatePublished - 2019
Externally publishedYes
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego

Bibliographical note

Funding Information:
This work was supported by the Office of Naval Research under ONR Award No. N00014-16-1-2732.

Publisher Copyright:
© 2019 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.


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