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Analysis of dynamic characteristics of variable intake turbine rotor based on fluid-solid coupling.

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Title: Analysis of dynamic characteristics of variable intake turbine rotor based on fluid-solid coupling.
Authors: Su, Huashan1,2 (AUTHOR), Shi, Fei1,2 (AUTHOR), Hu, Tao1,2 (AUTHOR) hutao@ctgu.edu.cn, Wang, Gang1,2 (AUTHOR), Dai, Zhongyan3 (AUTHOR)
Source: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power & Energy (Sage Publications, Ltd.). Dec2025, Vol. 239 Issue 8, p1244-1261. 18p.
Subjects: Modal analysis, Critical speeds (Engineering), Frequency response, Hydraulic couplings, Active noise & vibration control, Rotors, Turbines
Abstract: To address the issue of vibration exceedance in a variable intake turbine rotor system, the optimized system undergoes dry and wet modal analysis as well as harmonic response analysis, examining the impact of key parameters and opening variations on its dynamic characteristics. The results show that: The critical speed of the rotor system is elevated to 60,434 r/min, representing a 20% increase over the design speed. No resonance is observed, and the amplitude of the unbalance response diminishes from 1.05 mm to 0.13 mm. The most sensitive locations for unbalance in the first three orders of steady state are identified at the impeller disk and the magnets. The critical speed of the rotor system rises with increased bearing stiffness, stabilizing once the stiffness surpasses 109 N /m. Additionally, the imbalance measure alone influences the response amplitude, maintaining a proportional relationship. As the variable inlet turbine's inlet angle expands, the first-order critical speed of the rotor system under fluid-solid coupling conditions diminishes, while the overall magnitude of the imbalance reaction escalates. This study's conclusions can enhance the stability of power cycle operations associated with the variable inlet turbine and serve as a reference for the optimum design of the rotor system. [ABSTRACT FROM AUTHOR]
Copyright of Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power & Energy (Sage Publications, Ltd.) is the property of Sage Publications, 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: 189325276
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Analysis of dynamic characteristics of variable intake turbine rotor based on fluid-solid coupling.
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  Data: <searchLink fieldCode="AR" term="%22Su%2C+Huashan%22">Su, Huashan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Fei%22">Shi, Fei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Tao%22">Hu, Tao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> hutao@ctgu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Gang%22">Wang, Gang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dai%2C+Zhongyan%22">Dai, Zhongyan</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Modal+analysis%22">Modal analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Critical+speeds+%28Engineering%29%22">Critical speeds (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Frequency+response%22">Frequency response</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulic+couplings%22">Hydraulic couplings</searchLink><br /><searchLink fieldCode="DE" term="%22Active+noise+%26+vibration+control%22">Active noise & vibration control</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors%22">Rotors</searchLink><br /><searchLink fieldCode="DE" term="%22Turbines%22">Turbines</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To address the issue of vibration exceedance in a variable intake turbine rotor system, the optimized system undergoes dry and wet modal analysis as well as harmonic response analysis, examining the impact of key parameters and opening variations on its dynamic characteristics. The results show that: The critical speed of the rotor system is elevated to 60,434 r/min, representing a 20% increase over the design speed. No resonance is observed, and the amplitude of the unbalance response diminishes from 1.05 mm to 0.13 mm. The most sensitive locations for unbalance in the first three orders of steady state are identified at the impeller disk and the magnets. The critical speed of the rotor system rises with increased bearing stiffness, stabilizing once the stiffness surpasses 109 N /m. Additionally, the imbalance measure alone influences the response amplitude, maintaining a proportional relationship. As the variable inlet turbine's inlet angle expands, the first-order critical speed of the rotor system under fluid-solid coupling conditions diminishes, while the overall magnitude of the imbalance reaction escalates. This study's conclusions can enhance the stability of power cycle operations associated with the variable inlet turbine and serve as a reference for the optimum design of the rotor system. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power & Energy (Sage Publications, Ltd.) is the property of Sage Publications, 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.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1177/09576509251384156
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 1244
    Subjects:
      – SubjectFull: Modal analysis
        Type: general
      – SubjectFull: Critical speeds (Engineering)
        Type: general
      – SubjectFull: Frequency response
        Type: general
      – SubjectFull: Hydraulic couplings
        Type: general
      – SubjectFull: Active noise & vibration control
        Type: general
      – SubjectFull: Rotors
        Type: general
      – SubjectFull: Turbines
        Type: general
    Titles:
      – TitleFull: Analysis of dynamic characteristics of variable intake turbine rotor based on fluid-solid coupling.
        Type: main
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          Name:
            NameFull: Su, Huashan
      – PersonEntity:
          Name:
            NameFull: Shi, Fei
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          Name:
            NameFull: Hu, Tao
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            NameFull: Wang, Gang
      – PersonEntity:
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            NameFull: Dai, Zhongyan
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            – D: 01
              M: 12
              Text: Dec2025
              Type: published
              Y: 2025
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              Value: 239
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              Value: 8
          Titles:
            – TitleFull: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power & Energy (Sage Publications, Ltd.)
              Type: main
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