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Research on the technical improvement of the turbine runner of a power station based on improving stability.

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Title: Research on the technical improvement of the turbine runner of a power station based on improving stability.
Authors: Li, Shenhui1 (AUTHOR), Yao, Bing1 (AUTHOR), Pang, Jiayang2 (AUTHOR) pangjy9603@163.com, Liu, Demin3 (AUTHOR), Chengmei, Dan4 (AUTHOR), Jiang, Dengyun5 (AUTHOR), Wang, Haiqi1 (AUTHOR), Gang, Yuanyuan1 (AUTHOR), Cheng, Huan3 (AUTHOR), Liu, Xiaobing1 (AUTHOR) liuxb@mail.xhu.edu.cn
Source: Energy Science & Engineering. Oct2024, Vol. 12 Issue 10, p4582-4597. 16p.
Subject Terms: *Francis turbines, *Draft tubes, *Shearing force, *Numerical calculations, *Turbines
Abstract: In view of problems such as the narrow efficiency area, large hydraulic vibration area, pressure pulsation, and serious sediment wear of turbines at the Futang hydropower station, the technical transformation of turbine runners was carried out by modifying the blade shape and increasing the blade thickness, and a combination of numerical simulations based on shear stress transport k–ω turbulence model and tests was adopted to improve the operational stability of power station units. Calculation and testing demonstrate an enlargement of the high‐efficiency zone. Specifically, the optimal efficiency of the runner increases by 0.37%, while the rated efficiency rises by 0.19%. Significant reductions are observed in pressure pulsation within the draft tube and vaneless area decrease of approximately 50%. There is a high‐frequency pressure pulsation in the vaneless zone and the runner under low‐load conditions, and the influence of dynamic and static interference gradually weakens with the increase of opening. The draft tube is prone to eccentric vortex bands under partial working conditions, which causes the unit to be affected by low‐frequency pulsation. This optimization also leads to a notable decrease in runner blade wear, with the maximum sand and water velocity reduced from 45 to 40 m/s, resulting in a 30% reduction in sand wear. Moreover, there is a substantial enhancement in the runner's stiffness, with the thickness of the blade near the high stress area of the upper crown and lower ring increasing by over 50%, and the weight of each individual blade increasing by more than 50%. These research findings validate that modifying the runner blade effectively improves flow patterns, reduces eddy current generation, minimizes pressure pulsation, widens the high‐efficiency zone, decreases wear, and enhances the operational stability of the unit. The technical transformation method and research results of this study have important guiding significance for similar technical transformation of other power stations [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 180608623
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PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Research on the technical improvement of the turbine runner of a power station based on improving stability.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Li%2C+Shenhui%22">Li, Shenhui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yao%2C+Bing%22">Yao, Bing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pang%2C+Jiayang%22">Pang, Jiayang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> pangjy9603@163.com</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Demin%22">Liu, Demin</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chengmei%2C+Dan%22">Chengmei, Dan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Dengyun%22">Jiang, Dengyun</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Haiqi%22">Wang, Haiqi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gang%2C+Yuanyuan%22">Gang, Yuanyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Huan%22">Cheng, Huan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiaobing%22">Liu, Xiaobing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liuxb@mail.xhu.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energy+Science+%26+Engineering%22">Energy Science & Engineering</searchLink>. Oct2024, Vol. 12 Issue 10, p4582-4597. 16p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Francis+turbines%22">Francis turbines</searchLink><br />*<searchLink fieldCode="DE" term="%22Draft+tubes%22">Draft tubes</searchLink><br />*<searchLink fieldCode="DE" term="%22Shearing+force%22">Shearing force</searchLink><br />*<searchLink fieldCode="DE" term="%22Numerical+calculations%22">Numerical calculations</searchLink><br />*<searchLink fieldCode="DE" term="%22Turbines%22">Turbines</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In view of problems such as the narrow efficiency area, large hydraulic vibration area, pressure pulsation, and serious sediment wear of turbines at the Futang hydropower station, the technical transformation of turbine runners was carried out by modifying the blade shape and increasing the blade thickness, and a combination of numerical simulations based on shear stress transport k–ω turbulence model and tests was adopted to improve the operational stability of power station units. Calculation and testing demonstrate an enlargement of the high‐efficiency zone. Specifically, the optimal efficiency of the runner increases by 0.37%, while the rated efficiency rises by 0.19%. Significant reductions are observed in pressure pulsation within the draft tube and vaneless area decrease of approximately 50%. There is a high‐frequency pressure pulsation in the vaneless zone and the runner under low‐load conditions, and the influence of dynamic and static interference gradually weakens with the increase of opening. The draft tube is prone to eccentric vortex bands under partial working conditions, which causes the unit to be affected by low‐frequency pulsation. This optimization also leads to a notable decrease in runner blade wear, with the maximum sand and water velocity reduced from 45 to 40 m/s, resulting in a 30% reduction in sand wear. Moreover, there is a substantial enhancement in the runner's stiffness, with the thickness of the blade near the high stress area of the upper crown and lower ring increasing by over 50%, and the weight of each individual blade increasing by more than 50%. These research findings validate that modifying the runner blade effectively improves flow patterns, reduces eddy current generation, minimizes pressure pulsation, widens the high‐efficiency zone, decreases wear, and enhances the operational stability of the unit. The technical transformation method and research results of this study have important guiding significance for similar technical transformation of other power stations [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=180608623
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1002/ese3.1898
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 4582
    Subjects:
      – SubjectFull: Francis turbines
        Type: general
      – SubjectFull: Draft tubes
        Type: general
      – SubjectFull: Shearing force
        Type: general
      – SubjectFull: Numerical calculations
        Type: general
      – SubjectFull: Turbines
        Type: general
    Titles:
      – TitleFull: Research on the technical improvement of the turbine runner of a power station based on improving stability.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Li, Shenhui
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            NameFull: Yao, Bing
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            NameFull: Pang, Jiayang
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            NameFull: Liu, Demin
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            NameFull: Chengmei, Dan
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            NameFull: Jiang, Dengyun
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            NameFull: Wang, Haiqi
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            NameFull: Gang, Yuanyuan
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            NameFull: Cheng, Huan
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            NameFull: Liu, Xiaobing
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          Dates:
            – D: 01
              M: 10
              Text: Oct2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 20500505
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            – Type: volume
              Value: 12
            – Type: issue
              Value: 10
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            – TitleFull: Energy Science & Engineering
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