Stepped spillway with pre-aeration by a deflector: flow characteristics

Detalhes bibliográficos
Autor(a) principal: Novakoski,Carolina Kuhn
Data de Publicação: 2020
Outros Autores: Ferla,Rute, Prá,Maurício Dai, Canellas,Alba Valéria Brandão, Marques,Marcelo Giulian, Teixeira,Eder Daniel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: RBRH (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100226
Resumo: ABSTRACT Stepped spillways aim to dissipate part of the upstream energy during the flow passage by the chute. However, the use of these structures is limited to a restrict range of specific discharges due to the risk of cavitation damage. As the air entrainment into the flow assists the concrete protection against the aforementioned damages, a possible solution by aerators installed along the chute, already disseminated to smooth chutes, is being studied to be used also in stepped spillways. The purpose of the present paper is to characterize a flow over a stepped chute with induced aeration by deflector and air supply by an airtight chamber trough tests conducted on a reduced scale physical model. The main regions observed during the tests are presented and were developed four equations that allow to approximately predict the location of the main regions for a given spillway.
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spelling Stepped spillway with pre-aeration by a deflector: flow characteristicsStepped spillwayAerated flowsReduced hydraulic modelsDeflector influenceABSTRACT Stepped spillways aim to dissipate part of the upstream energy during the flow passage by the chute. However, the use of these structures is limited to a restrict range of specific discharges due to the risk of cavitation damage. As the air entrainment into the flow assists the concrete protection against the aforementioned damages, a possible solution by aerators installed along the chute, already disseminated to smooth chutes, is being studied to be used also in stepped spillways. The purpose of the present paper is to characterize a flow over a stepped chute with induced aeration by deflector and air supply by an airtight chamber trough tests conducted on a reduced scale physical model. The main regions observed during the tests are presented and were developed four equations that allow to approximately predict the location of the main regions for a given spillway.Associação Brasileira de Recursos Hídricos2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100226RBRH v.25 2020reponame:RBRH (Online)instname:Associação Brasileira de Recursos Hídricos (ABRH)instacron:ABRH10.1590/2318-0331.252020190051info:eu-repo/semantics/openAccessNovakoski,Carolina KuhnFerla,RutePrá,Maurício DaiCanellas,Alba Valéria BrandãoMarques,Marcelo GiulianTeixeira,Eder Danieleng2020-06-23T00:00:00Zoai:scielo:S2318-03312020000100226Revistahttps://www.scielo.br/j/rbrh/https://old.scielo.br/oai/scielo-oai.php||rbrh@abrh.org.br2318-03311414-381Xopendoar:2020-06-23T00:00RBRH (Online) - Associação Brasileira de Recursos Hídricos (ABRH)false
dc.title.none.fl_str_mv Stepped spillway with pre-aeration by a deflector: flow characteristics
title Stepped spillway with pre-aeration by a deflector: flow characteristics
spellingShingle Stepped spillway with pre-aeration by a deflector: flow characteristics
Novakoski,Carolina Kuhn
Stepped spillway
Aerated flows
Reduced hydraulic models
Deflector influence
title_short Stepped spillway with pre-aeration by a deflector: flow characteristics
title_full Stepped spillway with pre-aeration by a deflector: flow characteristics
title_fullStr Stepped spillway with pre-aeration by a deflector: flow characteristics
title_full_unstemmed Stepped spillway with pre-aeration by a deflector: flow characteristics
title_sort Stepped spillway with pre-aeration by a deflector: flow characteristics
author Novakoski,Carolina Kuhn
author_facet Novakoski,Carolina Kuhn
Ferla,Rute
Prá,Maurício Dai
Canellas,Alba Valéria Brandão
Marques,Marcelo Giulian
Teixeira,Eder Daniel
author_role author
author2 Ferla,Rute
Prá,Maurício Dai
Canellas,Alba Valéria Brandão
Marques,Marcelo Giulian
Teixeira,Eder Daniel
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Novakoski,Carolina Kuhn
Ferla,Rute
Prá,Maurício Dai
Canellas,Alba Valéria Brandão
Marques,Marcelo Giulian
Teixeira,Eder Daniel
dc.subject.por.fl_str_mv Stepped spillway
Aerated flows
Reduced hydraulic models
Deflector influence
topic Stepped spillway
Aerated flows
Reduced hydraulic models
Deflector influence
description ABSTRACT Stepped spillways aim to dissipate part of the upstream energy during the flow passage by the chute. However, the use of these structures is limited to a restrict range of specific discharges due to the risk of cavitation damage. As the air entrainment into the flow assists the concrete protection against the aforementioned damages, a possible solution by aerators installed along the chute, already disseminated to smooth chutes, is being studied to be used also in stepped spillways. The purpose of the present paper is to characterize a flow over a stepped chute with induced aeration by deflector and air supply by an airtight chamber trough tests conducted on a reduced scale physical model. The main regions observed during the tests are presented and were developed four equations that allow to approximately predict the location of the main regions for a given spillway.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100226
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100226
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/2318-0331.252020190051
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Recursos Hídricos
publisher.none.fl_str_mv Associação Brasileira de Recursos Hídricos
dc.source.none.fl_str_mv RBRH v.25 2020
reponame:RBRH (Online)
instname:Associação Brasileira de Recursos Hídricos (ABRH)
instacron:ABRH
instname_str Associação Brasileira de Recursos Hídricos (ABRH)
instacron_str ABRH
institution ABRH
reponame_str RBRH (Online)
collection RBRH (Online)
repository.name.fl_str_mv RBRH (Online) - Associação Brasileira de Recursos Hídricos (ABRH)
repository.mail.fl_str_mv ||rbrh@abrh.org.br
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