Delay of stall for a stationary wing placed in a wake

Z. Zhang, Z. Wang, I. Gursul

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


The unsteady aerodynamics of a wing with NACA 0012 profile placed in a turbulent wake was investigated experimentally in a wind tunnel at a chord Reynolds number of 105. The quasi-periodic large-scale coherent vortical structures lead to substantial lift enhancement and delay of stall, which is due to the flow separation, leading-edge vortex formation, and subsequent reattachment in a process similar to the dynamic stall of oscillating wings. There exists an optimal offset distance from the wake centreline at which the maximum lift enhancement was observed. The smaller amplitude flow oscillation at the optimal locations rather than the direct impingement at the wake centreline cause the formation of a larger separation bubble in the post-stall regime.

Original languageEnglish
Title of host publicationAIAA Scitech 2021 Forum
Place of PublicationU. S. A.
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages17
ISBN (Print)9781624106095
Publication statusPublished - 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

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