The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders
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?...
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| Format: | Article |
| Language: | en_US |
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American Society of Mechanical Engineers
2017
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| Online Access: | http://hdl.handle.net/1721.1/109277 https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X |
| _version_ | 1826195813161762816 |
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| author | Rao, Zhibiao Resvanis, Themistocles L Vandiver, John Kim |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Rao, Zhibiao Resvanis, Themistocles L Vandiver, John Kim |
| author_sort | Rao, Zhibiao |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T10:15:53Z |
| format | Article |
| id | mit-1721.1/109277 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:15:53Z |
| publishDate | 2017 |
| publisher | American Society of Mechanical Engineers |
| record_format | dspace |
| spelling | mit-1721.1/1092772022-09-30T20:02:03Z The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders Rao, Zhibiao Resvanis, Themistocles L Vandiver, John Kim Massachusetts Institute of Technology. Department of Mechanical Engineering Rao, Zhibiao Resvanis, Themistocles L Vandiver, John Kim 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. DeepStar (Consortium) SHEAR7 JIP 2017-05-23T12:07:30Z 2017-05-23T12:07:30Z 2014-06 Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-4540-0 http://hdl.handle.net/1721.1/109277 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). https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X en_US http://dx.doi.org/10.1115/OMAE2014-24472 Volume 2: CFD and VIV 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. application/pdf American Society of Mechanical Engineers American Society of Mechanical Engineers (ASME) |
| spellingShingle | Rao, Zhibiao Resvanis, Themistocles L Vandiver, John Kim The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title | The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title_full | The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title_fullStr | The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title_full_unstemmed | The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title_short | The Identification of Power-In Region in Vortex-Induced Vibration of Flexible Cylinders |
| title_sort | identification of power in region in vortex induced vibration of flexible cylinders |
| url | http://hdl.handle.net/1721.1/109277 https://orcid.org/0000-0002-5664-103X https://orcid.org/0000-0002-6144-660X |
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