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URANS predictions on the hydrodynamic interaction of a conceptual FLNG-LNG offloading system in regular waves

Citation

Jin, Y and Chai, S and Duffy, J and Chin, C and Bose, N, URANS predictions on the hydrodynamic interaction of a conceptual FLNG-LNG offloading system in regular waves, Ocean Engineering, 153 pp. 363-386. ISSN 0029-8018 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Elsevier

DOI: doi:10.1016/j.oceaneng.2018.01.102

Abstract

Using an unsteady Reynolds-Averaged Navier-Stokes solver, numerical investigations of hydrodynamic interactions of a conceptual FLNG-LNG offloading system in regular head sea waves are presented. Initially, a verification study is performed on estimating the numerical uncertainties within the URANS model. Based on the validated computational setup, the gap wave responses and wave loads on the FLNG and LNG vessels are studied for different wave frequencies and varying lateral separations. URANS predictions on the gap wave responses are compared with that from the experiments and demonstrate better accuracy over potential flow calculations especially at relatively high wave frequency conditions where gap wave resonance occurs. From the data gathered, it is seen that the gap wave resonance appears when the incident wave frequency approaches the natural frequency of the gap fluid, resulting in significant variation of wave loads in the directions of sway, heave, pitch and yaw. Meanwhile, reduction in the lateral separation shifts the occurrence of gap wave resonance to a higher wave frequency and brings more significant exaggerations on the gap waves and wave loads. Furthermore, when comparing model and full scale wave loads and gap wave responses, the two series of data correlate well implying insignificant influence of scale effects.

Item Details

Item Type:Refereed Article
Keywords:FLNG-LNG interaction, wave loads, gap wave resonance, unsteady reynolds averaged navier-stokes, equations
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ship and Platform Hydrodynamics
Objective Division:Energy
Objective Group:Mining and Extraction of Energy Resources
Objective Field:Oil and Gas Extraction
UTAS Author:Jin, Y (Mr Yuting Jin)
UTAS Author:Chai, S (Professor Shuhong Chai)
UTAS Author:Duffy, J (Dr Jonathan Duffy)
UTAS Author:Chin, C (Dr Chris Chin)
UTAS Author:Bose, N (Professor Neil Bose)
ID Code:124613
Year Published:2018
Web of Science® Times Cited:1
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2018-03-01
Last Modified:2018-11-23
Downloads:0

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