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dc.contributor.authorEstrella Toral, Soledad
dc.contributor.authorSánchez Juny, Martí
dc.contributor.authorDolz Ripollès, Josep
dc.contributor.authorIbáñez, R.
dc.contributor.authorDomínguez, M.
dc.contributor.authorBalairón, Luis
dc.contributor.authorLópez, D.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Hidràulica, Marítima i Ambiental
dc.date.accessioned2013-02-06T14:04:59Z
dc.date.created2012
dc.date.issued2012
dc.identifier.citationEstrella, S. [et al.]. Velocity and air concentration in air-water flow: application on a stepped spillway without sidewalls. A: International Symposium on Hydraulic Structures. "Proceedings of the 4th IAHR International Symposium on Hydraulic Structures, 9-11 February 2012, Porto, Portugal". Porto: Associação Portuguesa dos Recursos Hídricos, 2012, p. 1-8.
dc.identifier.isbn978-989-8509-01-7
dc.identifier.urihttp://hdl.handle.net/2117/17590
dc.descriptionUntil now, hydraulic research of stepped spillways has focused on characterizing aspects as: the different types of flow that occur on the chute, the air inception processes, the potential negative effects associated to the risk of cavitation, the energy dissipation produced by the steps, or the discharge capacity of the spillway. These investigations, however, have focused on stepped spillways with sidewalls, which impose a constant width along the dam. This paper shows the first results of the Collaborative Applied Research project ALIVESCA, conducted between Dragados S.A., the FLUMEN Institute and the Centre for Hydrographic Studies of CEDEX. The project aims to analyze the hydraulic behavior of stepped spillways without sidewalls and establish new criteria for the design of these structures. On the construction viewpoint, avoiding the sidewalls will reduce costs and risks in the project execution. Specifically, the paper aims to analyze the velocity and the air concentration measurements over a spillway model. In particular, aeration is one of the most effective mechanisms to reduce the risk of cavitation damage because the air-water compressibility absorbs the impact of collapsing vaporized bubbles.
dc.description.abstractUntil now, hydraulic research of stepped spillways has focused on characterizing aspects as: the different types of flow that occur on the chute, the air inception processes, the potential negative effects associated to the risk of cavitation, the energy dissipation produced by the steps, or the discharge capacity of the spillway. These investigations, however, have focused on stepped spillways with sidewalls, which impose a constant width along the dam. This paper shows the first results of the Collaborative Applied Research project ALIVESCA, conducted between Dragados S.A., the FLUMEN Institute and the Centre for Hydrographic Studies of CEDEX. The project aims to analyze the hydraulic behavior of stepped spillways without sidewalls and establish new criteria for the design of these structures. On the construction viewpoint, avoiding the sidewalls will reduce costs and risks in the project execution. Specifically, the paper aims to analyze the velocity and the air concentration measurements over a spillway model. In particular, aeration is one of the most effective mechanisms to reduce the risk of cavitation damage because the air-water compressibility absorbs the impact of collapsing vaporized bubbles.
dc.format.extent8 p.
dc.language.isoeng
dc.publisherAssociação Portuguesa dos Recursos Hídricos
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Enginyeria hidràulica, marítima i sanitària::Embassaments i preses
dc.subject.lcshSpillways--Design and construction
dc.subject.otherstepped spillway
dc.subject.otherhydraulic model
dc.subject.otheraeration
dc.subject.othervelocity
dc.subject.otherair concentration
dc.titleVelocity and air concentration in air-water flow: application on a stepped spillway without sidewalls
dc.typeConference lecture
dc.subject.lemacPreses (Enginyeria) -- Mesures de seguretat
dc.contributor.groupUniversitat Politècnica de Catalunya. FLUMEN - Dinàmica Fluvial i Enginyeria Hidrològica
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac11250225
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorEstrella, S.; Sanchez-Juny, M.; Dolz, J.; Ibáñez, R.; Domínguez, M.; Balairón, L.; López, D.
local.citation.contributorInternational Symposium on Hydraulic Structures
local.citation.pubplacePorto
local.citation.publicationNameProceedings of the 4th IAHR International Symposium on Hydraulic Structures, 9-11 February 2012, Porto, Portugal
local.citation.startingPage1
local.citation.endingPage8


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