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
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
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