Energy transformation on flow-induced motions of multiple cylindrical structures with various corner shapes
Liang, Yibo and Tao, Longbin and Xiao, Longfei (2020) Energy transformation on flow-induced motions of multiple cylindrical structures with various corner shapes. Physics of Fluids, 32 (2). 027105. ISSN 1070-6631 (https://doi.org/10.1063/1.5131325)
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Abstract
A comprehensive numerical study on flow-induced motions (FIMs) of a deep-draft semi-submersible, a typical multiple cylindrical structure in offshore engineering, was carried out to investigate the energy transformation of the vortex shedding process. In addition, the corner shape effect on the flow characteristics, the hydrodynamic forces, and the FIM responses are presented for a multiple cylindrical structure with various corner shapes (sharp, rounded, and chamfered) under 45○ current incidence. Different energy transformations, hydrodynamic characteristics, and FIM responses were observed due to the slight variation of the corner shape. The galloping at 45○ incidence for a square section shape column was observed when the corner shape modified as a chamfered corner. A “re-attached vortex shedding” phenomenon is discovered when the “lock-in” happened for a chamfered corner design. Further insights of the fluid physics into the flow characteristics due to the difference of the corner shape are revealed. In addition, the energy transformation and the mechanism for reducing the hydrodynamic forces and the FIM responses are analyzed.
ORCID iDs
Liang, Yibo, Tao, Longbin ORCID: https://orcid.org/0000-0002-8389-7209 and Xiao, Longfei;-
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Item type: Article ID code: 71729 Dates: DateEvent25 February 2020Published3 February 2020AcceptedSubjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering Department: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering Depositing user: Pure Administrator Date deposited: 09 Mar 2020 14:35 Last modified: 27 Nov 2024 04:21 URI: https://strathprints.strath.ac.uk/id/eprint/71729