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Interference of Downstream Body on the Oscillation Behavior of a Circular and a Square Cylinder in Uniform Flow

[+] Author Affiliations
Naoto Kato, Tsutomu Takahashi, Masataka Shirakashi

Nagaoka University of Technology, Nagaoka, Niigata, Japan

Mizuyasu Koide

Niigata Sangyo University, Kashiwazaki, Niigata, Japan

Paper No. PVP2005-71517, pp. 593-599; 7 pages
doi:10.1115/PVP2005-71517
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 4: Fluid Structure Interaction
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4189-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

Wind tunnel experiment showed that the Kármán vortex excitation of a circular and a square cylinder is effectively suppressed by setting another cylindrical body downstream in a cruciform arrangement with a certain gap between them, and that the galloping of a square cylinder is also completely suppressed by the downstream cylinder. However, a new oscillation is induced over a velocity range higher than that of the Kármán vortex excitation, caused by longitudinal vortices which shed periodically around the crossing. These interference effects of the downstream cylinder on the upstream cylinder oscillation are different depending on the cross-sectional configuration of the cylinders.

Copyright © 2005 by ASME

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