Leading edge vortex separation study by different vortex and flow separation identification methods

Yangzi Huang, Melissa A Green

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

Abstract

The separation process of leading edge vortices (LEV) from an unsteady pitching plate is studied. The analysis processes a large amount of data from the two dimensional (2D) simulation of a at plate undergoing a 45° pitch-up maneuver. Large scale lift loss on the plate is shown to correlate with the vortex shedding. A Lagrangian coherent structures (LCS) analysis, including hyperbolic LCSs, Lagrangian-Averaged Vorticity Deviation (LAVD), and both FTLE saddle and λ-saddle are all applied around the LEV to identify the vortex dynamics. This is compared with a calculation of the circulation and the vortex shedding mechanism (VSM). The identified LEV dynamics revealed by multiple vortex criteria match with the circulation development and lift history in time, suggesting that LEV separation is a good model for various vortex shedding mechanisms.

Original languageEnglish (US)
Title of host publication8th AIAA Theoretical Fluid Mechanics Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104978
StatePublished - Jan 1 2017
Event8th AIAA Theoretical Fluid Mechanics Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Other

Other8th AIAA Theoretical Fluid Mechanics Conference, 2017
CountryUnited States
CityDenver
Period6/5/176/9/17

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

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  • Cite this

    Huang, Y., & Green, M. A. (2017). Leading edge vortex separation study by different vortex and flow separation identification methods. In 8th AIAA Theoretical Fluid Mechanics Conference, 2017 American Institute of Aeronautics and Astronautics Inc, AIAA.