Cristin-resultat-ID: 1717837
Sist endret: 19. desember 2019, 14:16
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

A two-dimensional numerical and experimental study of piston and sloshing resonance in moonpools with recess

Bidragsytere:
  • Senthuran Ravinthrakumar
  • Trygve Kristiansen
  • Bernard Jean Marie Molin og
  • Babak Ommani

Tidsskrift

Journal of Fluid Mechanics
ISSN 0022-1120
e-ISSN 1469-7645
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2019
Trykket: 2019
Volum: 877
Sider: 142 - 166

Importkilder

Scopus-ID: 2-s2.0-85071088097

Beskrivelse Beskrivelse

Tittel

A two-dimensional numerical and experimental study of piston and sloshing resonance in moonpools with recess

Sammendrag

The piston and first sloshing modes of two-dimensional moonpools with recess are investigated. Dedicated forced heave experiments are carried out. Different recess lengths are tested from 1/4 to 1/2 of the length of the moonpool at the mean waterline. A theoretical model to calculate the natural frequencies is developed based on linearized potential flow theory and eigenfunction expansion. Two numerical methods are implemented: a boundary element method (BEM) and a Navier–Stokes solver (CFD). Both the BEM and CFD have linearized free-surface and body-boundary conditions. As expected, the BEM over-predicts the moonpool response significantly, in particular at the first sloshing mode. The CFD is in general able to predict the maximum moonpool response adequately, both at the piston and first sloshing modes. Both numerical methods fail to predict the Duffing-type behaviour at the first sloshing mode, due to the linearized free-surface conditions. The Duffing behaviour is more pronounced for the largest recess. The main source of damping in the proximity of the first sloshing mode is discussed.

Bidragsytere

Senthuran Ravinthrakumar

  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet

Trygve Kristiansen

  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet

Bernard Jean Marie Molin

  • Tilknyttet:
    Forfatter
    ved Aix-Marseille Université
  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet

Babak Ommani

  • Tilknyttet:
    Forfatter
    ved Energi og transport ved SINTEF Ocean
  • Tilknyttet:
    Forfatter
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet
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