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Effects of after-body on the FIV of a right-angle triangular cylinder in comparison to circular, square, and diamond cross-sections

Tamimi, V ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1080/17445302.2018.1534314
  3. Publisher: Taylor and Francis Ltd , 2018
  4. Abstract:
  5. 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. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group
  6. Keywords:
  7. Flow induced vibration ; Hydroelastic efficiency ; Triangular cylinder ; Cylinders (shapes) ; Diamonds ; Hydroelasticity ; Energy converters ; Feasibility studies ; Flow induced vibrations ; Hydroelastic ; Isosceles triangular ; Separation points ; Tank experiments ; Transverse galloping ; Cylinder configurations
  8. Source: Ships and Offshore Structures ; 2018 ; 17445302 (ISSN)
  9. URL: https://www.tandfonline.com/doi/full/10.1080/17445302.2018.1534314