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Air–water flow in a plain stilling basin below smooth and stepped chutes.

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Title: Air–water flow in a plain stilling basin below smooth and stepped chutes.
Authors: Stojnic, Ivan1 (AUTHOR) ivan.stojnic@gruner.ch, Pfister, Michael2 (AUTHOR), Matos, Jorge3 (AUTHOR), Schleiss, Anton J.4 (AUTHOR)
Source: Journal of Hydraulic Research / Journal de Recherches Hydraulique. Feb2023, Vol. 61 Issue 1, p51-66. 16p.
Subjects: Hydraulic jump, Cavitation erosion, Dams, Broad jump, Cavitation, Plains, Spillways
Abstract: In recent decades, stepped chutes followed by a stilling basin became a standard for spillways of dams. The comprehensive knowledge of stepped chute approach flows on internal air–water flow properties of the hydraulic jump is still too limited for an appropriate design of stilling basins. Therefore, an experimental campaign was performed on a large-scale physical model of a plain stilling basin preceded by a 30° sloping smooth or stepped chute. Stepped chute approach flows induce lower deaeration rates along the jump roller as compared to smooth chute approach flows, indicating longer dimensionless jump lengths, normalized by the tailwater depth. Pronounced bottom air concentrations were observed within the first 40% of the jump length in the stilling basin downstream of the stepped chute. Thus, despite the significantly higher pressure fluctuations, this zone seems better protected against cavitation damage than in stilling basins following a smooth chute. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 161831289
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
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  Data: Air–water flow in a plain stilling basin below smooth and stepped chutes.
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  Data: <searchLink fieldCode="AR" term="%22Stojnic%2C+Ivan%22">Stojnic, Ivan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ivan.stojnic@gruner.ch</i><br /><searchLink fieldCode="AR" term="%22Pfister%2C+Michael%22">Pfister, Michael</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Matos%2C+Jorge%22">Matos, Jorge</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schleiss%2C+Anton+J%2E%22">Schleiss, Anton J.</searchLink><relatesTo>4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Hydraulic+Research+%2F+Journal+de+Recherches+Hydraulique%22">Journal of Hydraulic Research / Journal de Recherches Hydraulique</searchLink>. Feb2023, Vol. 61 Issue 1, p51-66. 16p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Hydraulic+jump%22">Hydraulic jump</searchLink><br /><searchLink fieldCode="DE" term="%22Cavitation+erosion%22">Cavitation erosion</searchLink><br /><searchLink fieldCode="DE" term="%22Dams%22">Dams</searchLink><br /><searchLink fieldCode="DE" term="%22Broad+jump%22">Broad jump</searchLink><br /><searchLink fieldCode="DE" term="%22Cavitation%22">Cavitation</searchLink><br /><searchLink fieldCode="DE" term="%22Plains%22">Plains</searchLink><br /><searchLink fieldCode="DE" term="%22Spillways%22">Spillways</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In recent decades, stepped chutes followed by a stilling basin became a standard for spillways of dams. The comprehensive knowledge of stepped chute approach flows on internal air–water flow properties of the hydraulic jump is still too limited for an appropriate design of stilling basins. Therefore, an experimental campaign was performed on a large-scale physical model of a plain stilling basin preceded by a 30° sloping smooth or stepped chute. Stepped chute approach flows induce lower deaeration rates along the jump roller as compared to smooth chute approach flows, indicating longer dimensionless jump lengths, normalized by the tailwater depth. Pronounced bottom air concentrations were observed within the first 40% of the jump length in the stilling basin downstream of the stepped chute. Thus, despite the significantly higher pressure fluctuations, this zone seems better protected against cavitation damage than in stilling basins following a smooth chute. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=161831289
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/00221686.2022.2106593
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 51
    Subjects:
      – SubjectFull: Hydraulic jump
        Type: general
      – SubjectFull: Cavitation erosion
        Type: general
      – SubjectFull: Dams
        Type: general
      – SubjectFull: Broad jump
        Type: general
      – SubjectFull: Cavitation
        Type: general
      – SubjectFull: Plains
        Type: general
      – SubjectFull: Spillways
        Type: general
    Titles:
      – TitleFull: Air–water flow in a plain stilling basin below smooth and stepped chutes.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Stojnic, Ivan
      – PersonEntity:
          Name:
            NameFull: Pfister, Michael
      – PersonEntity:
          Name:
            NameFull: Matos, Jorge
      – PersonEntity:
          Name:
            NameFull: Schleiss, Anton J.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 02
              Text: Feb2023
              Type: published
              Y: 2023
          Identifiers:
            – Type: issn-print
              Value: 00221686
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            – Type: volume
              Value: 61
            – Type: issue
              Value: 1
          Titles:
            – TitleFull: Journal of Hydraulic Research / Journal de Recherches Hydraulique
              Type: main
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