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Torsion Galloping of Elongated Bluff Cross Sections

[+] Author Affiliations
Allan Larsen

COWI Consulting Engineers, Lyngby, Denmark

Paper No. IMECE2002-32286, pp. 403-409; 7 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • 5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-3659-2 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


Torsion galloping of slender structures in a fluid stream is often attributed to a sign reversal of the moment slope, i.e. the moment coefficient attains increasingly negative values with increasing positive angles of attack or visa versa. A numerical and experimental study has revealed that torsion galloping of certain bluff elongated cross sections can not be attributed solely to moment slope reversal but rather the formation and drift of large coherent vortex structures along the body surface.

Copyright © 2002 by ASME



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