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dc.contributor.authorYang, S.
dc.contributor.authorShi, B.
dc.contributor.authorGuo, Yakun
dc.contributor.authorYang, L.
dc.date.accessioned2019-06-27T13:17:45Z
dc.date.available2019-06-27T13:17:45Z
dc.date.issued2019-06-15
dc.identifier.citationYang S, Shi B, Guo Y et al (2019) Investigation on scour protection of submarine piggyback pipeline. Ocean Engineering. 182: 442-450.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17148
dc.descriptionYesen_US
dc.description.abstractThis paper presents the results of laboratory experiments and numerical simulations to investigate the effect of different piggyback pipeline configuration on the morphology of local seabed scour subject to steady currents. Piggyback pipeline configuration investigated includes the commonly used piggyback pipeline, namely a small pipe attached on the top of large pipe and new form of piggyback pipeline proposed in this study in which a small pipe is attached to the large pipe on the upstream and downstream side, respectively. Pressure gradient, drag coefficient, lift coefficient and scour extent around pipelines are measured and analyzed for a range of pipelines and current conditions. Results show that the vortex strength downstream of the commonly used piggyback pipeline is larger than that for a single as well as the new piggyback pipeline under the same condition. This new type piggyback pipeline can effectively reduce the depth and width of the scour hole. In particular, when the ratio of the small pipe diameter over the large pipe diameter is greater than 0.3, little scour under this new type piggyback pipeline occurs for the test conditions. The bed topography downstream of the pipe has also been altered to favor the backfill.en_US
dc.description.sponsorshipNational Natural Science Foundation of China (No. 51279189).en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.1016/j.oceaneng.2019.04.090en_US
dc.rights© 2019 Elsevier Ltd. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en_US
dc.subjectPiggyback pipelineen_US
dc.subjectStead currenten_US
dc.subjectDiameter ratioen_US
dc.subjectScour holeen_US
dc.subjectScour protectionen_US
dc.titleInvestigation on scour protection of submarine piggyback pipelineen_US
dc.status.refereedYesen_US
dc.date.Accepted2019-04-27
dc.date.application2019-05-08
dc.typeArticleen_US
dc.date.EndofEmbargo2020-05-09
dc.type.versionAccepted manuscripten_US
dc.description.publicnotesThe full-text of this article will be released for public view at the end of the publisher embargo on 09 May 2020.en_US
refterms.dateFOA2019-06-27T13:18:11Z


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