Effects of after-body on the FIV of a right-angle triangular cylinder in comparison to circular, square, and diamond cross-sections. (18th August 2019)

• Record Type: Journal Article
• Authors: Tamimi, V.; Naeeni, S. T. O.; Zeinoddini, M.; Seif, M. S.; Dolatshahi Pirooz, M.
• Is Part Of: Ships and offshore structures. Volume 14:Number 6(2019)
• Page Start: 589
• Page End: 599
• Publication Date: 2019-08-18
• Subjects: Flow induced vibration -- Transverse galloping -- Triangular cylinder -- Hydroelastic efficiency; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2018.1534314
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: This in-water experimental study deals with the effects of the after-body on the FIV response of round and sharp edge cylinders. Different circular, square, diamond, and right-angle isosceles triangular cross-sections are investigated. The triangular cylinder is examined in four different symmetrical and unsymmetrical configurations with respect to the incident flow. The current towing tank experiments form a basis for the feasibility study of the isosceles triangular cylinders for FIV energy converters. The results indicate that the cylinders with a flat side perpendicular to the flow have a galloping type of response. In contrast, the cylinders with a sharp vertex pointing the flow show a VIV type of response. The galloping amplitude in the triangular cylinder with similar after-body and separation points to a diamond cylinder is significantly higher than that in the square cylinder. This right isosceles triangular cylinder also displays considerably greater hydroelastic efficiency than other sharp edge oscillators.