Interaction of quasi-two-dimensional vortical gusts with swept and unswept wings

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


Water tunnel experiments were conducted to study the interaction of gusts with swept and unswept finite wings set at zero angle of attack. Single vortex filaments were generated by plunging an upstream airfoil at zero angle of attack in transient motion. The vortex filament, which was initially quasi-two-dimensional, deformed, diffused, and lost coherency as it interacted with the wing. The details of the interaction were documented by means of phase-locked force measurements and particle image velocimetry (PIV) measurements in multiple spanwise planes. Phase-locked PIV measurements show trajectory deflection, vortex diffusion, and flow separation over the wing. For the swept wing, the local structure of the vortex only depends on the relative location of the wing cross-section at that particular spanwise plane. The results show that when the counterclockwise vortex passes the wing in proximity, the lift coefficient CL exhibits a sharp rise followed by a sharp decrease to negative values before recovering to zero.

Original languageEnglish
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages22
ISBN (Print)9781624106095
Publication statusPublished - Jan 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: 11 Jan 202115 Jan 2021

Publication series

NameAIAA Scitech 2021 Forum


ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this