Modification of vortex identification method based on normalized angular momentum

Vladimir Kurnosov, Sergey Shkarayev

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

Abstract

The vortex identification method based on normalized angular momentum functions is revisited. In the original method, the function locating the vortex center is not a Galilean invariant. In order to overcome this drawback, the function was modified by adding the convective velocity term determined as the average velocity over the vortex core. This method was then verified through numerical simulations of the Lamb-Oseen vortex in the freestream. Applications of this method to velocity fields obtained by Particle Image Velocimetry (PIV) through wind tunnel experiments on a wing and a propeller blade are discussed. This modified method with enhanced Galilean invariance showed an overall better accuracy and robustness of vortex detection.

Original languageEnglish (US)
Title of host publication33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105029
StatePublished - 2017
Event33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Publication series

Name33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017

Other

Other33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017
CountryUnited States
CityDenver
Period6/5/176/9/17

ASJC Scopus subject areas

  • Aerospace Engineering

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  • Cite this

    Kurnosov, V., & Shkarayev, S. (2017). Modification of vortex identification method based on normalized angular momentum. In 33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017 (33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017). American Institute of Aeronautics and Astronautics Inc, AIAA.