The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders
Name
The identification.pdf
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2.42 MB
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Checksum (MD5)
0760a9389bd5a66f7111f106af27a341
Author(s)
Rao, Zhibiao
Resvanis, Themistocles L
Vandiver, John Kim
Date Issued
June 2014
Journal
Volume 2: CFD and VIV
Publisher
American Society of Mechanical Engineers
Citation
Rao, Zhibiao, Themistocles L. Resvanis, and J. Kim Vandiver. “The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders.” Volume 2: CFD and VIV (June 8, 2014).
Version
Final published version
Abstract
This paper proposes a novel method to identify the power-in regions of long flexible cylinders subjected to vortex-induced vibration (VIV). It also attempts to address a practical problem: “Will a secondary power-in region appear after the primary power-in region is covered with suppression devices?” The source of data is a recent model test on a 38 meter long flexible cylinder, densely instrumented with fiber optic strain gauges and accelerometers. For pipes with partial coverage of suppression devices in uniform flow, the bare region would be expected to be a power-in region and the section with suppression devices is expected to be a power-out region. Experimental data from these types of tests are used to benchmark the proposed power-in zone identification method. The method is then used to identify the power-in zones on a bare cylinder in a sheared flow. This paper also explores the occurrence of secondary power-in regions that may exist, when suppression devices are placed in the primary power-in zone. Secondary power-in regions were observed. Lessons learned from the power-in region identification in sheared flows will be a useful tool for designer/engineers choosing where to place suppression devices.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/OMAE2014-24472
