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Effect of Spindle Deviation on the Performance of Adjustable Ejectors.

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Title: Effect of Spindle Deviation on the Performance of Adjustable Ejectors.
Authors: Gao, Jianxiang1 (AUTHOR), Hou, Yuyan1 (AUTHOR), Su, Xiao1 (AUTHOR), Chen, Weixiong1 (AUTHOR) chenweixiong@mail.xjtu.edu.cn, Zheng, Jiantao2 (AUTHOR), Wang, Jinshi1 (AUTHOR), Chong, Daotong1 (AUTHOR)
Source: Heat Transfer Engineering. 2026, Vol. 47 Issue 2, p170-181. 12p.
Subjects: Fluid dynamics, Injectors, Fluid flow, Pressure control, Mechanical efficiency, Computer simulation, Dynamic loads
Abstract: Due to the change of working load caused by peak shaving and frequency modulation in power plants, the traditional fixed ejector cannot meet the requirements of high-performance operation under variable load conditions. However, the adjustable ejector with spindle has problems such as the length of the spindle is too long, and the anti-vibration measures are not in place. The spindle vibrates and deflects during the operation of the ejector. In this research, the influence of the structure deviation of the spindle on the ejector performance is evaluated by numerical simulation. The results show that the spindle of the adjustable ejector can obtain the maximum secondary fluid mass flow by controlling the primary fluid. Under different operating conditions, the entrainment ratio of the adjustable ejector is improved by 114.7% compared with that of the fixed ejector. The structural deviation will reduce the entrainment ratio and anti-back pressure capability, and the ejector will change from the critical mode to the sub-critical mode. The deviation between the spindle and the primary nozzle will change the flow field inside the primary nozzle, thus affecting the primary fluid ejection direction and the entrainment ratio. [ABSTRACT FROM AUTHOR]
Copyright of Heat Transfer Engineering 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.)
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An: 189876418
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  Data: Effect of Spindle Deviation on the Performance of Adjustable Ejectors.
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  Data: <searchLink fieldCode="AR" term="%22Gao%2C+Jianxiang%22">Gao, Jianxiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Yuyan%22">Hou, Yuyan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Su%2C+Xiao%22">Su, Xiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Weixiong%22">Chen, Weixiong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chenweixiong@mail.xjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Jiantao%22">Zheng, Jiantao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Jinshi%22">Wang, Jinshi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chong%2C+Daotong%22">Chong, Daotong</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Heat+Transfer+Engineering%22">Heat Transfer Engineering</searchLink>. 2026, Vol. 47 Issue 2, p170-181. 12p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Injectors%22">Injectors</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+flow%22">Fluid flow</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure+control%22">Pressure control</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+efficiency%22">Mechanical efficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+loads%22">Dynamic loads</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Due to the change of working load caused by peak shaving and frequency modulation in power plants, the traditional fixed ejector cannot meet the requirements of high-performance operation under variable load conditions. However, the adjustable ejector with spindle has problems such as the length of the spindle is too long, and the anti-vibration measures are not in place. The spindle vibrates and deflects during the operation of the ejector. In this research, the influence of the structure deviation of the spindle on the ejector performance is evaluated by numerical simulation. The results show that the spindle of the adjustable ejector can obtain the maximum secondary fluid mass flow by controlling the primary fluid. Under different operating conditions, the entrainment ratio of the adjustable ejector is improved by 114.7% compared with that of the fixed ejector. The structural deviation will reduce the entrainment ratio and anti-back pressure capability, and the ejector will change from the critical mode to the sub-critical mode. The deviation between the spindle and the primary nozzle will change the flow field inside the primary nozzle, thus affecting the primary fluid ejection direction and the entrainment ratio. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Heat Transfer Engineering 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.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/01457632.2024.2437891
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 170
    Subjects:
      – SubjectFull: Fluid dynamics
        Type: general
      – SubjectFull: Injectors
        Type: general
      – SubjectFull: Fluid flow
        Type: general
      – SubjectFull: Pressure control
        Type: general
      – SubjectFull: Mechanical efficiency
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Dynamic loads
        Type: general
    Titles:
      – TitleFull: Effect of Spindle Deviation on the Performance of Adjustable Ejectors.
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          Name:
            NameFull: Gao, Jianxiang
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            NameFull: Hou, Yuyan
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            NameFull: Su, Xiao
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            NameFull: Chen, Weixiong
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            NameFull: Zheng, Jiantao
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            NameFull: Wang, Jinshi
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            NameFull: Chong, Daotong
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            – D: 15
              M: 01
              Text: 2026
              Type: published
              Y: 2026
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              Value: 47
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            – TitleFull: Heat Transfer Engineering
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