Forces Acting on a Vortex-Excited Vibrating Cylinder in Planar Oscillatory Flow

by Kenjirou Hayashi, Natl Defense Acad, Yokosuka, Japan,
Yousou Ogihara, Natl Defense Acad, Yokosuka, Japan,
Koji Fujima, Natl Defense Acad, Yokosuka, Japan,
Toshiyuki Sigemura, Natl Defense Acad, Yokosuka, Japan,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: An experimental investigation into the vortex-excited vibration of a circular cylinder in planar oscillatory flow has been made with emphasis being placed on the amplification of the forces acting on a cylinder caused by the fluid-structure interaction. The range of Keulegan Carpenter number covered is from 4 to 19. It is found that the amplifications of the in-line force and transverse force acting on a vortex-excited vibrating cylinder being resonant with the second harmonic component of the transverse force are large in the range of Keulegan-Carpenter number about 6 to 8.

Subject Headings: Fluid flow | Oscillatory flow | Flow measurement | Water flow | Cylinders | Vortex shedding | Vibration

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