IMECH-IR  > 流固耦合系统力学重点实验室
Influences of the helical strake cross-section shape on vortex-induced vibrations suppression for a long flexible cylinder
Xu WH(徐万海); Luan YS; Liu LQ; Wu YX(吴应湘)
Source PublicationCHINA OCEAN ENGINEERING
2017-08-01
Volume31Issue:4Pages:438-446
ISSN0890-5487
Abstract

An experimental study on a bare flexible cylinder as well as cylinders fitted with two types of cross-sectioned helical strakes was carried out in a towing tank. The main purpose of this paper is to investigate the effects of strakes' crosssection on the vortex-induced vibrations (VIV) suppression of a flexible cylinder. The square-sectioned and roundsectioned helical strakes were selected in the experimental tests. The uniform current was generated by towing the cylinder models along the tank using a towing carriage. The Reynolds number was in the range of 800-16000. The strain responses were measured by the strain gages in cross-flow (CF) and in-line (IL) directions. A modal analysis method was adopted to obtain the displacement responses using the strain signals in different measurement positions. The comparison of the experimental results among the bare cylinder, square-sectioned straked cylinder and roundsectioned straked cylinder was performed. The helical strakes can effectively reduce the strain amplitude, displacement amplitude, response frequencies and dominant modes of a flexible cylinder excited by VIV. And the mean drag coefficients of straked cylinders were approximately consistent with each other. In addition, the squaresectioned and round-sectioned strakes nearly share the similar VIV reduction behaviors. Sometimes, the strakes with round-section represent more excellent effects on the VIV suppression of response frequency than those with square-section.

KeywordHelical Strakes Viv Suppression Cross-section Shape Flexible Cylinder
DOI10.1007/s13344-017-0050-1
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000407720200006
WOS KeywordCircular-cylinders ; Riser ; Viv ; Drag ; Flow ; Coverage ; Uniform
WOS Research AreaEngineering ; Water Resources
WOS SubjectEngineering, Civil ; Engineering, Ocean ; Engineering, Mechanical ; Water Resources
Funding OrganizationNational Natural Science Foundation of China(51479135 ; Science Fund for Creative Research Groups of the National Natural Science Foundation of China(51621092) ; Major State Basic Research Development Program of China (973 Program)(2014CB046801) ; Natural Science Foundation of Tianjin(15JCQNJC07700) ; 51525803 ; 51679167)
CSCD IDCSCD:6053426
DepartmentLMFS多相流及流固耦合(LHO)
ClassificationQ4
Ranking3
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/70029
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu LQ
Recommended Citation
GB/T 7714
Xu WH,Luan YS,Liu LQ,et al. Influences of the helical strake cross-section shape on vortex-induced vibrations suppression for a long flexible cylinder[J]. CHINA OCEAN ENGINEERING,2017,31(4):438-446.
APA Xu WH,Luan YS,Liu LQ,&Wu YX.(2017).Influences of the helical strake cross-section shape on vortex-induced vibrations suppression for a long flexible cylinder.CHINA OCEAN ENGINEERING,31(4),438-446.
MLA Xu WH,et al."Influences of the helical strake cross-section shape on vortex-induced vibrations suppression for a long flexible cylinder".CHINA OCEAN ENGINEERING 31.4(2017):438-446.
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