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Pressure and velocity of a wedge aerator at the bottom outlet.

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Title: Pressure and velocity of a wedge aerator at the bottom outlet.
Authors: Song, Tantao1 (AUTHOR), Deng, Jun1 (AUTHOR), Xu, Weilin1 (AUTHOR), Liu, Chao1 (AUTHOR), Wei, Wangru1 (AUTHOR) weiwangru@scu.edu.cn
Source: Journal of Hydraulic Research / Journal de Recherches Hydraulique. Jun2026, Vol. 64 Issue 3, p384-397. 14p.
Subjects: Fluid pressure, Velocity, Cavitation, Backwater, Hydraulics, Flow stability (Fluid dynamics)
Abstract: Bottom aerators are used to form cavities and prevent cavitation. However, on small slopes and low Froude numbers, backwater formation can compromise their effectiveness. This study introduces a wedge aerator installed at the end of a pressurized bottom outlet, splitting the flow into upper and lower layers to stabilize the air cavity. Systematic experiments were performed to optimize the hydraulic characteristics of the wedge aerators. The results indicated that increasing the wedge height extended the cavity length and reduced the backwater. At optimal heights, the lower flow layer functions as a hydrodynamic cushion, mitigating backwater under low Froude numbers. The turbulent flow stability downstream is influenced by the wedge height, which is inversely correlated with the backwater intensity. A higher wedge aerator can stabilize the bottom pressure with negligible side-wall effects. These findings advance the understanding of wedge aerators hydraulics and support more effective design strategies for high-speed bottom outlets. [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
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 194489723
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Pressure and velocity of a wedge aerator at the bottom outlet.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Tantao%22">Song, Tantao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deng%2C+Jun%22">Deng, Jun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Weilin%22">Xu, Weilin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Chao%22">Liu, Chao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Wangru%22">Wei, Wangru</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> weiwangru@scu.edu.cn</i>
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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>. Jun2026, Vol. 64 Issue 3, p384-397. 14p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Fluid+pressure%22">Fluid pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Velocity%22">Velocity</searchLink><br /><searchLink fieldCode="DE" term="%22Cavitation%22">Cavitation</searchLink><br /><searchLink fieldCode="DE" term="%22Backwater%22">Backwater</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulics%22">Hydraulics</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+stability+%28Fluid+dynamics%29%22">Flow stability (Fluid dynamics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Bottom aerators are used to form cavities and prevent cavitation. However, on small slopes and low Froude numbers, backwater formation can compromise their effectiveness. This study introduces a wedge aerator installed at the end of a pressurized bottom outlet, splitting the flow into upper and lower layers to stabilize the air cavity. Systematic experiments were performed to optimize the hydraulic characteristics of the wedge aerators. The results indicated that increasing the wedge height extended the cavity length and reduced the backwater. At optimal heights, the lower flow layer functions as a hydrodynamic cushion, mitigating backwater under low Froude numbers. The turbulent flow stability downstream is influenced by the wedge height, which is inversely correlated with the backwater intensity. A higher wedge aerator can stabilize the bottom pressure with negligible side-wall effects. These findings advance the understanding of wedge aerators hydraulics and support more effective design strategies for high-speed bottom outlets. [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=194489723
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/00221686.2026.2635126
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 384
    Subjects:
      – SubjectFull: Fluid pressure
        Type: general
      – SubjectFull: Velocity
        Type: general
      – SubjectFull: Cavitation
        Type: general
      – SubjectFull: Backwater
        Type: general
      – SubjectFull: Hydraulics
        Type: general
      – SubjectFull: Flow stability (Fluid dynamics)
        Type: general
    Titles:
      – TitleFull: Pressure and velocity of a wedge aerator at the bottom outlet.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Song, Tantao
      – PersonEntity:
          Name:
            NameFull: Deng, Jun
      – PersonEntity:
          Name:
            NameFull: Xu, Weilin
      – PersonEntity:
          Name:
            NameFull: Liu, Chao
      – PersonEntity:
          Name:
            NameFull: Wei, Wangru
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00221686
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            – Type: volume
              Value: 64
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Journal of Hydraulic Research / Journal de Recherches Hydraulique
              Type: main
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