Stepped spillway with pre-aeration by a deflector: flow characteristics
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
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 |
_version_ |
1754734701976748032 |