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Research on Taylor Vortex in the air-gap of flywheel energy storage systems.

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Title: Research on Taylor Vortex in the air-gap of flywheel energy storage systems.
Authors: Pan, Wenli1,2 (AUTHOR), Ma, Jianlong1,2,3 (AUTHOR) ma_jianlong@yeah.net, Zhang, Qian4 (AUTHOR), Zhang, Weiwei1,2,3 (AUTHOR), Ma, Rui1,2,3 (AUTHOR)
Source: International Communications in Heat & Mass Transfer. May2025:Part A, Vol. 164, pN.PAG-N.PAG. 1p.
Subjects: Taylor vortices, Energy storage, Electric power distribution grids, Contours (Cartography), Buoyancy
Abstract: Flywheel energy storage systems (FESSs) are integral to renewable energy integration in power grids, effectively mitigating wind and solar curtailment while stabilizing grid fluctuations. The thermal performance of FESSs particularly in low-pressure environments is often overlooked. Based on the operational similarity between FESSs and Taylor vortex reactors, this study investigates the flow characteristics of air-gap. The findings reveal the formation of Taylor vortex structures in the air-gap, occurring in the absence of axial buoyancy within the system's enclosed space. A distinct "C"-shaped vortex appeared in the upper flow field. Notably, the number of Taylor vortices correlated consistently with the number of high-velocity contour maps. With increasing rotation speed, the axial length of Taylor vortices decreased, leading to more compact structures, and both positive and negative vortices converged towards the central zone. Additionally, in the absence of Taylor vortices, two inflection points of the strong disturbance region emerged at the radial positions RB* = 0.27 and RB* = 0.81 in the air-gap between the stator and rotor, where groove-induced vortices dominated the flow field. As the rotation speed increased, the inflection points shifted towards the center, the width of the strong disturbance region near the wall expanded, and the vortex structures elongated axially. • The difference between the number of Taylor vortex and the number of "peak-shaped"high-value zone is one. • The axial length of Taylor vortex reduces and becoming more compact as the rotation speed increases. • Two inflection points (R B * = 0.27 and R B * = 0.81) of strong disturbance region move towards the middle zone as the rotation speed increases. • The vortex structure elongates at the axial direction in the groove structure of air-gap B. [ABSTRACT FROM AUTHOR]
Copyright of International Communications in Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science 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: 184997333
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Research on Taylor Vortex in the air-gap of flywheel energy storage systems.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Pan%2C+Wenli%22">Pan, Wenli</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Jianlong%22">Ma, Jianlong</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> ma_jianlong@yeah.net</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Qian%22">Zhang, Qian</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Weiwei%22">Zhang, Weiwei</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Rui%22">Ma, Rui</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Communications+in+Heat+%26+Mass+Transfer%22">International Communications in Heat & Mass Transfer</searchLink>. May2025:Part A, Vol. 164, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Taylor+vortices%22">Taylor vortices</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+power+distribution+grids%22">Electric power distribution grids</searchLink><br /><searchLink fieldCode="DE" term="%22Contours+%28Cartography%29%22">Contours (Cartography)</searchLink><br /><searchLink fieldCode="DE" term="%22Buoyancy%22">Buoyancy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Flywheel energy storage systems (FESSs) are integral to renewable energy integration in power grids, effectively mitigating wind and solar curtailment while stabilizing grid fluctuations. The thermal performance of FESSs particularly in low-pressure environments is often overlooked. Based on the operational similarity between FESSs and Taylor vortex reactors, this study investigates the flow characteristics of air-gap. The findings reveal the formation of Taylor vortex structures in the air-gap, occurring in the absence of axial buoyancy within the system's enclosed space. A distinct "C"-shaped vortex appeared in the upper flow field. Notably, the number of Taylor vortices correlated consistently with the number of high-velocity contour maps. With increasing rotation speed, the axial length of Taylor vortices decreased, leading to more compact structures, and both positive and negative vortices converged towards the central zone. Additionally, in the absence of Taylor vortices, two inflection points of the strong disturbance region emerged at the radial positions RB* = 0.27 and RB* = 0.81 in the air-gap between the stator and rotor, where groove-induced vortices dominated the flow field. As the rotation speed increased, the inflection points shifted towards the center, the width of the strong disturbance region near the wall expanded, and the vortex structures elongated axially. • The difference between the number of Taylor vortex and the number of "peak-shaped"high-value zone is one. • The axial length of Taylor vortex reduces and becoming more compact as the rotation speed increases. • Two inflection points (R B * = 0.27 and R B * = 0.81) of strong disturbance region move towards the middle zone as the rotation speed increases. • The vortex structure elongates at the axial direction in the groove structure of air-gap B. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Communications in Heat & Mass Transfer is the property of Pergamon Press - An Imprint of Elsevier Science 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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.icheatmasstransfer.2025.108804
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Taylor vortices
        Type: general
      – SubjectFull: Energy storage
        Type: general
      – SubjectFull: Electric power distribution grids
        Type: general
      – SubjectFull: Contours (Cartography)
        Type: general
      – SubjectFull: Buoyancy
        Type: general
    Titles:
      – TitleFull: Research on Taylor Vortex in the air-gap of flywheel energy storage systems.
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            NameFull: Pan, Wenli
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            NameFull: Ma, Jianlong
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            NameFull: Zhang, Qian
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            NameFull: Zhang, Weiwei
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            NameFull: Ma, Rui
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            – D: 01
              M: 05
              Text: May2025:Part A
              Type: published
              Y: 2025
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              Value: 164
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            – TitleFull: International Communications in Heat & Mass Transfer
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