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Fluid forces acting on a circuler cylinder immersed in a sinusoidally oscillating flow at a low keulegan-carpenter number

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 45 Issue 1 Page 39-47
published_at 1994-10
KJ00000156992.pdf
[fulltext] 791 KB
Title
低KC数振動流中の円柱に作用する流体力
Fluid forces acting on a circuler cylinder immersed in a sinusoidally oscillating flow at a low keulegan-carpenter number
Creators Saitou Takasi
Creators Hirata Yukiyasu
Creators Urakawa Kazuhisa
Creators Kawamoto Nobuyuki
Source Identifiers
It is the purpose of this paper to make clear the cause for the considerable dispersion of inertia and drag coefficients of a circuler cylinder in a sinusoidally oscillating flow at low values of Keulegan-Carpenter's number. Drag and lift forces are measured by cantilever beam system with four PN semi-conductor gages simultaneously. The flow around a circuler cylinder are visualised by electrolysis. The following properties became evident after examining the experimental results. In the case of the process from production to shedding of eddy is symmetric with respect to a line of mainflow passes through a cylinder axis, the drag and resultant force coefficients shows a value about 2 times as mach of asymmetric formation of eddy at same K-C number. Asymmetric formation of eddy plays an important role to change the direction and magnitude of approaching velocity. As a result of these, it induce strong lift and decrease of drag and resultant forces.
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1994-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部