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dc.contributor.authorCarty, Alan
dc.contributor.authorO’Neill, Colin
dc.contributor.authorNash, Stephen
dc.contributor.authorClifford, Eoghan
dc.contributor.authorMulligan, Sean
dc.date.accessioned2019-09-03T10:49:12Z
dc.date.issued2019-07-29
dc.identifier.citationCarty, Alan, O’ Neill, Colin, Nash, Stephen, Clifford, Eoghan, & Mulligan, Sean. (2019). Hydrodynamic modelling approaches to assess mechanisms affecting the structural performance and maintenance of vortex drops shaft structures. Journal of Structural Integrity and Maintenance, 4(3), 162-178. doi: 10.1080/24705314.2019.1622188en_IE
dc.identifier.issn2470-5322
dc.identifier.urihttp://hdl.handle.net/10379/15371
dc.description.abstractVortex drop shafts, a key hydraulic structure within modern day deep sewer conveyance systems, must be designed structurally to sustain performance and longevity of operating life under very energetic loading conditions. This has significant cost implications but to date little research has been undertaken to investigate the loading conditions with a view to optimising the shaft designs and thus lowering costs. In this study, several modelling methods were adopted to simulate hydrodynamic conditions within a vortex drop shaft to assess hydrodynamic mechanisms that impact a drop shaft liners structural performance and maintenance. A 1/10 scaled physical hydraulic model of a tangential inlet vortex drop shaft structure is tested and used to validate a three-dimensional multiphase numerical model. Collectively, the study presents methods on identifying hydrodynamic phenomena such as pressures, velocities, erosion and abrasion mechanisms, debris impact locations and blocking mechanisms. The study highlighted that the hydrodynamic forces that threaten structural integrity reside in the vortex generator and a short length of the drop shaft downstream. This is shown through a new model developed by the authors to predict centrifugal forces along the length of the drop. Through these methods, the study proposes that drop shaft liners can be designed more efficiently.en_IE
dc.description.sponsorshipThe authors of this work would like to thank Ward and Burke Construction Ltd for their support when compiling this article. The authors would further like to express gratitude to Edward Kilcullen and Dermot Mc Dermott for their assistance during physical modelling investigations.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherTaylor & Francisen_IE
dc.relation.ispartofJournal of Structural Integrity and Maintenanceen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectVortexen_IE
dc.subjectdrop shaften_IE
dc.subjectdrop shaft linersen_IE
dc.subjectdeep tunnel conveyanceen_IE
dc.subjectsewersen_IE
dc.subjecthydraulic structuresen_IE
dc.subjectRIVER INCISIONen_IE
dc.titleHydrodynamic modelling approaches to assess mechanisms affecting the structural performance and maintenance of vortex drops shaft structuresen_IE
dc.typeArticleen_IE
dc.date.updated2019-08-13T16:02:50Z
dc.identifier.doi10.1080/24705314.2019.1622188
dc.local.publishedsourcehttps://doi.org/10.1080/24705314.2019.1622188en_IE
dc.description.peer-reviewedpeer-reviewed
dc.description.embargo2020-07-29
dc.internal.rssid17215418
dc.local.contactEoghan Clifford, Room 1035, Alice Perry Engineering Building, Nui Galway, Galway. 2219 Email: eoghan.clifford@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland