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Novel full‐region model of inherent orifice aerostatic bearings considering air flow in orifice and clearance.

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Title: Novel full‐region model of inherent orifice aerostatic bearings considering air flow in orifice and clearance.
Authors: Li, Wenjun1 (AUTHOR), Zhang, Yinjie1 (AUTHOR), Wang, Peng1 (AUTHOR), Feng, Kai1 (AUTHOR) jkai.feng@gmail.com, Cui, Hailong2 (AUTHOR), Zheng, Yueqing2 (AUTHOR)
Source: Lubrication Science. Jun2022, Vol. 34 Issue 4, p258-274. 17p.
Subjects: Laminar flow, Reynolds equations, Discharge coefficient, Air pressure, Static pressure, Air flow, Orifice plates (Fluid dynamics)
Abstract: The performance of inherent orifice‐restricted aerostatic bearings (IORABs) is directly determined by the coupling of air flow in the orifice and clearance. This paper presents a novel full‐region model to analyse the performance of IORABs. The air flowing in the orifice is treated to be adiabatic. The air flow in the pressure depression region of the clearance, which is the key factor influencing the bearing performance, including inertial and viscous terms, is modelled. The Reynolds equation is used to simulate the air flow in the laminar flow region of the clearance. By using this model, the pressure distribution, including the pressure depression characteristics, could be accurately predicted and achieved substantial agreement with the experimental results. The predicted load capacity is accorded well with the published experimental data without relying on the discharge coefficients. The airflow characteristics in the orifice are crucial in determining the bearing performance and directly influenced by the orifice inner surface shape (OISS). Therefore, the pressure distribution and the static characteristics of the bearings with coupling different OISS are also systematically analysed by using this model. Narrowing and widening OISS influence the pressure depression region and the pressure value of the turning point to directly influence the static characteristics of the bearings. The full‐region model and the results are significantly for guiding the precisely calculating and designing the IORABs. [ABSTRACT FROM AUTHOR]
Copyright of Lubrication Science is the property of Wiley-Blackwell 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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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Novel full‐region model of inherent orifice aerostatic bearings considering air flow in orifice and clearance.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Wenjun%22">Li, Wenjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yinjie%22">Zhang, Yinjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Peng%22">Wang, Peng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Feng%2C+Kai%22">Feng, Kai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jkai.feng@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Cui%2C+Hailong%22">Cui, Hailong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zheng%2C+Yueqing%22">Zheng, Yueqing</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Lubrication+Science%22">Lubrication Science</searchLink>. Jun2022, Vol. 34 Issue 4, p258-274. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Laminar+flow%22">Laminar flow</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+equations%22">Reynolds equations</searchLink><br /><searchLink fieldCode="DE" term="%22Discharge+coefficient%22">Discharge coefficient</searchLink><br /><searchLink fieldCode="DE" term="%22Air+pressure%22">Air pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Static+pressure%22">Static pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Air+flow%22">Air flow</searchLink><br /><searchLink fieldCode="DE" term="%22Orifice+plates+%28Fluid+dynamics%29%22">Orifice plates (Fluid dynamics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The performance of inherent orifice‐restricted aerostatic bearings (IORABs) is directly determined by the coupling of air flow in the orifice and clearance. This paper presents a novel full‐region model to analyse the performance of IORABs. The air flowing in the orifice is treated to be adiabatic. The air flow in the pressure depression region of the clearance, which is the key factor influencing the bearing performance, including inertial and viscous terms, is modelled. The Reynolds equation is used to simulate the air flow in the laminar flow region of the clearance. By using this model, the pressure distribution, including the pressure depression characteristics, could be accurately predicted and achieved substantial agreement with the experimental results. The predicted load capacity is accorded well with the published experimental data without relying on the discharge coefficients. The airflow characteristics in the orifice are crucial in determining the bearing performance and directly influenced by the orifice inner surface shape (OISS). Therefore, the pressure distribution and the static characteristics of the bearings with coupling different OISS are also systematically analysed by using this model. Narrowing and widening OISS influence the pressure depression region and the pressure value of the turning point to directly influence the static characteristics of the bearings. The full‐region model and the results are significantly for guiding the precisely calculating and designing the IORABs. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Lubrication Science is the property of Wiley-Blackwell 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: 10.1002/ls.1587
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 258
    Subjects:
      – SubjectFull: Laminar flow
        Type: general
      – SubjectFull: Reynolds equations
        Type: general
      – SubjectFull: Discharge coefficient
        Type: general
      – SubjectFull: Air pressure
        Type: general
      – SubjectFull: Static pressure
        Type: general
      – SubjectFull: Air flow
        Type: general
      – SubjectFull: Orifice plates (Fluid dynamics)
        Type: general
    Titles:
      – TitleFull: Novel full‐region model of inherent orifice aerostatic bearings considering air flow in orifice and clearance.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Li, Wenjun
      – PersonEntity:
          Name:
            NameFull: Zhang, Yinjie
      – PersonEntity:
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            NameFull: Wang, Peng
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            NameFull: Feng, Kai
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            NameFull: Cui, Hailong
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            NameFull: Zheng, Yueqing
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          Dates:
            – D: 01
              M: 06
              Text: Jun2022
              Type: published
              Y: 2022
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              Value: 09540075
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              Value: 34
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              Value: 4
          Titles:
            – TitleFull: Lubrication Science
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