Structure of tip vortex and wake of unsteady wings

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

Abstract

Experiments were carried out for plunging wings in order to investigate the unsteady features of the tip vortex and wake. Wave-like motion of the wake in the mid-span plane as well as the periodic variations of the tip vortex and wake in a crossflow plane were captured in flow visualization and velocity measurements. The amplitude and phase of these oscillations vary with wing oscillation frequency and amplitude. Both the tip vortex amplitude and the wake oscillation amplitude have poor correlation with Strouhal number, but the latter is always smaller at low Strouhal numbers. With increasing Strouhal number, wake oscillations become smaller as a reverse Karman street develops in the mid-span plane, while multiple vortical structures appear in the crossflow plane due to the interconnected vortex loops. These results have implications for vortex interactions with downstream wings.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages1-20
Number of pages20
ISBN (Print)9781624105951
DOIs
Publication statusE-pub ahead of print - 5 Jan 2020
EventAIAA Scitech Forum, 2020 - Orlando, USA United States
Duration: 6 Jan 202010 Jan 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUSA United States
CityOrlando
Period6/01/2010/01/20

ASJC Scopus subject areas

  • Aerospace Engineering

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