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ITS » Journal » Fakultas Teknologi Kelautan
Posted by rudiwp@oe.its.ac.id at 23/09/2015 16:02:06  •  1071 Views


HYDRODYNAMIC FORCES ACTING ON TWO FLEXIBLEF REE-HANGINGC ANTILEVERSIN TANDEM CONFIGURATIONSD UET O CROSS-FLOWS

Author :
PRASTIANTO, RUDI WALUJO ( 1971 0508 1997 03 1001 )




ABSTRAK

The experimental study has been performed on two flexible free-hanging circular cantilevers in tandem configurations subjected to uniform cross-flows. The experiment was intended to investigate the time-dependent forces characteristics acting on the cylinders due to Vortex- Induced Vibration VIV phenomenon. The tests cylinders have free bottom-end conditions and can freely oscillate. The motions of the cylinders are evaluated as a bidirectional motion in-line and transverse to the flow. Each cylinder has a length-to-diameter ratio of 34.4 with a low mass ratio of aboat 1.24. Based on cylinders diameter and free-stream flow velocities the Reynolds number varied from 10800 to 37800. For examining Wake Induced Vibration WIV on the induced forces characteristics five different gaps between the cylinders were employed. New various findings indicated that the dynamics of the present two free-hanging cantilever cylinders in tandem configurations are unique and definitely different to those other tandem configurations of either two stationary cylinders or a transverse-only motion downstream cylinder lies behind a stationary upstream one.



Keywordsfree-hanging cantilevers, tandem configurations, cross-flow, Vortex Induced Vibration (VIV), free bottom-end condition, bidirectional motion, Wake Induced Vibration (WIV).
 
Subject:  Hidrodinamika
Date Create: 19/10/2015
Type: Text
Format: PDF
Language: English
Identifier: ITS-Journal-40111150000034
Collection ID: 40111150000034
Call Number: 532.5 Pra h


Source
Article of Journal

Coverage
ITS Community

Rights
IPTEK, The Journal for Technology and Science, Vol. 20, No. 4, November 2009




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ITS-Journal-40111150000034-38960.pdf




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