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Numerical study of erosion in critical components of subsea pipeline: tees vs bends

Pouraria, H; Seo, JK; Paik, JK; (2017) Numerical study of erosion in critical components of subsea pipeline: tees vs bends. Ships and Offshore Structures , 12 (2) pp. 233-243. 10.1080/17445302.2015.1131889. Green open access

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Abstract

Elbows are a vulnerable part of piping systems in erosive environments. Traditionally, plugged tees are used instead of elbows when the erosion rate is high. However, the advantage of plugged tees over elbows in large-scale pipelines is unclear. A comprehensive computational fluid dynamics study was carried out to predict the erosion rate in plugged tees and elbows. A numerical method was first used for aluminium elbows and tees with available experimental data through which the accuracy of the numerical solution was verified. After validating the model, numerical modelling was used to compare the erosion rates of plugged tees and elbows in varying geometrical conditions, ranging from 0.0254 to 0.6 m diameter carbon steel pipes transmitting multiphase gas/sand flow. The effects of internal flow velocity and sand particle size on erosion rates were also investigated. The numerical results revealed that the erosion ratio between plugged tees and elbows strongly depends on the internal diameter of the pipe, the flow velocity and particle size. Hence, the influence of these parameters should be considered for proper selection of the fittings to be used. Finally, numerical modelling of erosion in two subsea jumpers outfitted with standard elbows and plugged tees was presented.

Type: Article
Title: Numerical study of erosion in critical components of subsea pipeline: tees vs bends
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/17445302.2015.1131889
Publisher version: http://dx.doi.org/10.1080/17445302.2015.1131889
Language: English
Additional information: Copyright © 2016 Informa UK Limited, trading as Taylor & Francis Group. This is an Accepted Manuscript of an article published by Taylor & Francis in Ships and Offshore Structures on 29 January 2016, available online: http://www.tandfonline.com/10.1080/17445302.2015.1131889
Keywords: Numerical modelling, CFD, erosion, subsea pipeline, elbow
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1535306
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