Cristin-resultat-ID: 1282889
Sist endret: 31. mai 2017, 08:54
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2015

Experimental studies of hydrodynamic properties and screening of riser fairing concepts for deep water application

Bidragsytere:
  • Rolf Jarle Baarholm
  • Kjetil Skaugset
  • Halvor Lie og
  • Henning Braaten

Bok

ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering Volume 2: CFD and VIV
ISBN:
  • 978-0-7918-5648-2

Utgiver

The American Society of Mechanical Engineers (ASME)
NVI-nivå 1

Serie

International Conference on Offshore Mechanics and Arctic Engineering (OMAE) [proceedings]
ISSN 1523-651X
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2015
Volum: 2015
Hefte: 2
Antall sider: 12
ISBN:
  • 978-0-7918-5648-2

Klassifisering

Fagfelt (NPI)

Fagfelt: Marin og maritim teknologi
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Experimental studies of hydrodynamic properties and screening of riser fairing concepts for deep water application

Sammendrag

The VIV oscillations of marine risers are known to increase drag, and lead to structural fatigue. One proven method of suppressing this vibration is the use of fairings and strakes. These coverings essentially modify the flow along the cylinder, tripping the production of Karman vortices so that they act less coherently or far enough downstream so they interact less with the body. The Norwegian Deepwater Programme (NDP) has conducted a project with the objective to develop and qualify effective low drag fairing concepts with respect to VIV mitigation and galloping. Furthermore, emphasis is put on easy handling and installation. This paper describes the work and findings in an early phase of the development. This includes small scale model test campaigns. In addition to the bare riser for reference, the behaviour and performance of a total of 10 different fairing concepts are evaluated. Free oscillation tests are performed in a towing tank, where 2D fairings were tested in a pendulum set-up. The set-up enables free vibrations in up to 3 DOF (in-line and cross-flow vibrations and yaw). Fix tests with the purpose of establishing hydrodynamic coefficients for the various fairings have been performed in a large cavitation tunnel. Clear differences in performance have been noticed; particular for drag and galloping responses. Based on the results from the 2D tests, a screening of the fairing designs has been performed and the findings have set the course for further development of the most promising candidates for real life applications.

Bidragsytere

Rolf Jarle Baarholm

  • Tilknyttet:
    Forfatter
    ved Equinor

Kjetil Skaugset

  • Tilknyttet:
    Forfatter
    ved Equinor

Halvor Lie

  • Tilknyttet:
    Forfatter
    ved Energi og transport ved SINTEF Ocean

Henning Braaten

  • Tilknyttet:
    Forfatter
    ved Skip og havkonstruksjoner ved SINTEF Ocean
1 - 4 av 4

Resultatet er en del av Resultatet er en del av

ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering Volume 2: CFD and VIV.

NN, .. 2015, The American Society of Mechanical Engineers (ASME). Vitenskapelig antologi/Konferanseserie
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