Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates
ABSTRACT Aerator systems promote additional insertion of air into the flow and can reduce the risk of cavitation and consequent damage to hydraulic structures. This work analyzes the hydrodynamic pressures on the steps of a physical model (with a chute inclination of 53.13º) subjected to different a...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Recursos Hídricos
2023-07-01
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| Series: | Revista Brasileira de Recursos Hídricos |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312023000100217&tlng=en |
| _version_ | 1797767929664634880 |
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| author | Rute Ferla Carolina Kuhn Novakoski Guilherme Santanna Castiglio Mauricio Dai Prá Marcelo Giulian Marques Eder Daniel Teixeira |
| author_facet | Rute Ferla Carolina Kuhn Novakoski Guilherme Santanna Castiglio Mauricio Dai Prá Marcelo Giulian Marques Eder Daniel Teixeira |
| author_sort | Rute Ferla |
| collection | DOAJ |
| description | ABSTRACT Aerator systems promote additional insertion of air into the flow and can reduce the risk of cavitation and consequent damage to hydraulic structures. This work analyzes the hydrodynamic pressures on the steps of a physical model (with a chute inclination of 53.13º) subjected to different aeration conditions. When comparing the results with different air intake coefficients in the flow, it was concluded that the incorporation of air does not change in a generalized way all the statistical parameters associated with hydrodynamic pressures on the steps. However, with the insertion of air in the flow, there was an increase in the minimum pressure values measured in the region of the jet impact and downstream. Empirical equations for predicting the distribution of pressures on the steps under induced aeration conditions were proposed, valid for structures whose ratio between the height of the deflector and the height of the steps is equal to 0.167, with an aerator system installed at the beginning of the stepped chute. |
| first_indexed | 2024-03-12T20:46:05Z |
| format | Article |
| id | doaj.art-6a803d2509714c34a5fc1fedd91cf04f |
| institution | Directory Open Access Journal |
| issn | 2318-0331 |
| language | English |
| last_indexed | 2024-03-12T20:46:05Z |
| publishDate | 2023-07-01 |
| publisher | Associação Brasileira de Recursos Hídricos |
| record_format | Article |
| series | Revista Brasileira de Recursos Hídricos |
| spelling | doaj.art-6a803d2509714c34a5fc1fedd91cf04f2023-08-01T07:42:35ZengAssociação Brasileira de Recursos HídricosRevista Brasileira de Recursos Hídricos2318-03312023-07-012810.1590/2318-0331.282320230013Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow ratesRute Ferlahttps://orcid.org/0000-0002-7056-3306Carolina Kuhn Novakoskihttps://orcid.org/0000-0002-3740-7555Guilherme Santanna Castigliohttps://orcid.org/0000-0002-2554-7884Mauricio Dai Práhttps://orcid.org/0000-0002-1858-1531Marcelo Giulian Marqueshttps://orcid.org/0000-0002-9948-3094Eder Daniel Teixeirahttps://orcid.org/0000-0001-7595-486XABSTRACT Aerator systems promote additional insertion of air into the flow and can reduce the risk of cavitation and consequent damage to hydraulic structures. This work analyzes the hydrodynamic pressures on the steps of a physical model (with a chute inclination of 53.13º) subjected to different aeration conditions. When comparing the results with different air intake coefficients in the flow, it was concluded that the incorporation of air does not change in a generalized way all the statistical parameters associated with hydrodynamic pressures on the steps. However, with the insertion of air in the flow, there was an increase in the minimum pressure values measured in the region of the jet impact and downstream. Empirical equations for predicting the distribution of pressures on the steps under induced aeration conditions were proposed, valid for structures whose ratio between the height of the deflector and the height of the steps is equal to 0.167, with an aerator system installed at the beginning of the stepped chute.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312023000100217&tlng=enHydraulic structuresCavitationPhysical modelingDeflector |
| spellingShingle | Rute Ferla Carolina Kuhn Novakoski Guilherme Santanna Castiglio Mauricio Dai Prá Marcelo Giulian Marques Eder Daniel Teixeira Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates Revista Brasileira de Recursos Hídricos Hydraulic structures Cavitation Physical modeling Deflector |
| title | Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| title_full | Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| title_fullStr | Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| title_full_unstemmed | Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| title_short | Hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| title_sort | hydrodynamic pressures on a stepped spillway with an aerator system subjected to different air flow rates |
| topic | Hydraulic structures Cavitation Physical modeling Deflector |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312023000100217&tlng=en |
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