TY - GEN
T1 - Comparing leading and trailing edge vortex circulation history with vortex identification and tracking methods
AU - Huang, Yangzi
AU - Green, Melissa A.
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All Rights Reserved.
PY - 2016
Y1 - 2016
N2 - The instantaneous circulation of vortices shed from an unsteady pitching panel is studied to reveal the formation and shedding processes of leading edge vortices (LEV). The analysis processes a large amount of data from the 2D simulation of a flat plate undergoing a 45° pitch-up maneuver. Large scale lift loss on the panel is shown to correlate with the vortex shedding. The Eulerian Γ1 and Q criteria, and Lagrangian coherent structures (LCS) analysis including both finite-time Lyapunov exponent (FTLE) and Lagrangian-Averagcd Vorticity Deviation (LAVD) are all applied at the center and boundary of the LEV to identify the vortex dynamics. This is compared with a calculation of the circulation. The identified LEV dynamics revealed by multiple vortex criteria matches with the circulation development and lift history in time, indicating a consistent timing of LEV formation, growth, shedding, etc.
AB - The instantaneous circulation of vortices shed from an unsteady pitching panel is studied to reveal the formation and shedding processes of leading edge vortices (LEV). The analysis processes a large amount of data from the 2D simulation of a flat plate undergoing a 45° pitch-up maneuver. Large scale lift loss on the panel is shown to correlate with the vortex shedding. The Eulerian Γ1 and Q criteria, and Lagrangian coherent structures (LCS) analysis including both finite-time Lyapunov exponent (FTLE) and Lagrangian-Averagcd Vorticity Deviation (LAVD) are all applied at the center and boundary of the LEV to identify the vortex dynamics. This is compared with a calculation of the circulation. The identified LEV dynamics revealed by multiple vortex criteria matches with the circulation development and lift history in time, indicating a consistent timing of LEV formation, growth, shedding, etc.
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U2 - 10.2514/6.2016-2082
DO - 10.2514/6.2016-2082
M3 - Conference contribution
AN - SCOPUS:85007473745
SN - 9781624103933
T3 - 54th AIAA Aerospace Sciences Meeting
BT - 54th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 54th AIAA Aerospace Sciences Meeting, 2016
Y2 - 4 January 2016 through 8 January 2016
ER -