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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Печать: 0276-1459
ISSN Онлайн: 1943-6181

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Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.2019029489
pages 27-43

TWO-WAY COUPLED FLUID-STRUCTURE INTERACTION OF GAS-LIQUID SLUG FLOW IN A FLEXIBLE RISER: SMALL-SCALE EXPERIMENTS AND SIMULATIONS

Joaquin J. Vieiro
Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway
Anvar Akhiiartdinov
School of Petroleum Engineering, The University of Tulsa, Tulsa, Oklahoma 74110, USA
Svein Sævik
Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, 7491, Norway
Carl M. Larsen
Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, 7491, Norway
Ole J. Nydal
Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway

Краткое описание

Flexible risers might be subjected to large pressure and density fluctuations when transporting multiphase mixtures as different flow patterns may take place. Those fluctuations might induce large forces on the structure, which in turn may modify the global geometry of the riser. In this paper, results from one-way and two-way coupled fluid-structure simulations are compared against small-scale experiments of a flexible lazy wave riser transporting gas-liquid flow. Different gas flow rates are tested in order to obtain a range of slug frequencies. Predicted values of pipeline pressure, top tension, and riser displacement are compared with experimental data. The numerical prediction of the coupled behavior shows fairly good agreement with the experiments, having bias from 5% to 25% in slug frequency.

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