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Unsteady Flow and Noise Interference between the Propfan and the Swirl Recovery Vane.

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Title: Unsteady Flow and Noise Interference between the Propfan and the Swirl Recovery Vane.
Authors: Zhu, Lei1 (AUTHOR) 13324018981@163.com, Liu, Hanru2 (AUTHOR) hrHanru@nwpu.edu.cn, Chen, Nanshu1 (AUTHOR) chennanshu@mail.nwpu.edu.cn
Source: Journal of Aerospace Engineering. Jul2026, Vol. 39 Issue 4, p1-13. 13p.
Subjects: Unsteady flow, Interference (Sound), Dynamic loads, Noise control, Rotors, Vortex motion
Abstract: The propfan–swirl recovery vane (SRV) configuration is gaining renewed attention for its potential for higher propulsive efficiency, simpler transmission structure, and lower noise as compared to counterrotating propfans. In this paper, three primary unsteady interference mechanisms were analyzed, focusing on the far-field noise and identifying the contribution of different mechanisms to SRV noise. The results indicate that the propfan tip vortex amplified the pressure differential across the SRV, inducing the tip vortex in the SRV and causing significant load fluctuations, while the secondary flows in the root and viscous wake interference have limited effect. Propfan noise dominates at polar angles from 40° to 145°, while SRV noise is more pronounced at forward and aft polar angles. The maximum noise level of the propfan-SRV was recorded at the polar direction of 95°, reaching 132.03 dB. Spanwise decomposition of the SRV noise sources indicates that the midsection contributes most to the total SRV noise, while the tip region noise remains significant despite limited span extent. Notably, the swept SRV blade design induces phase differences across spanwise sections, leading to effective noise cancellation at specific polar angles. These findings provide valuable guidance for noise reduction design in the propfan-SRV configuration. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Aerospace Engineering is the property of American Society of Civil Engineers 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: 193805206
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Unsteady Flow and Noise Interference between the Propfan and the Swirl Recovery Vane.
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  Data: <searchLink fieldCode="AR" term="%22Zhu%2C+Lei%22">Zhu, Lei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 13324018981@163.com</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Hanru%22">Liu, Hanru</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> hrHanru@nwpu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Nanshu%22">Chen, Nanshu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chennanshu@mail.nwpu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Aerospace+Engineering%22">Journal of Aerospace Engineering</searchLink>. Jul2026, Vol. 39 Issue 4, p1-13. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Unsteady+flow%22">Unsteady flow</searchLink><br /><searchLink fieldCode="DE" term="%22Interference+%28Sound%29%22">Interference (Sound)</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+loads%22">Dynamic loads</searchLink><br /><searchLink fieldCode="DE" term="%22Noise+control%22">Noise control</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors%22">Rotors</searchLink><br /><searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The propfan–swirl recovery vane (SRV) configuration is gaining renewed attention for its potential for higher propulsive efficiency, simpler transmission structure, and lower noise as compared to counterrotating propfans. In this paper, three primary unsteady interference mechanisms were analyzed, focusing on the far-field noise and identifying the contribution of different mechanisms to SRV noise. The results indicate that the propfan tip vortex amplified the pressure differential across the SRV, inducing the tip vortex in the SRV and causing significant load fluctuations, while the secondary flows in the root and viscous wake interference have limited effect. Propfan noise dominates at polar angles from 40° to 145°, while SRV noise is more pronounced at forward and aft polar angles. The maximum noise level of the propfan-SRV was recorded at the polar direction of 95°, reaching 132.03 dB. Spanwise decomposition of the SRV noise sources indicates that the midsection contributes most to the total SRV noise, while the tip region noise remains significant despite limited span extent. Notably, the swept SRV blade design induces phase differences across spanwise sections, leading to effective noise cancellation at specific polar angles. These findings provide valuable guidance for noise reduction design in the propfan-SRV configuration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Aerospace Engineering is the property of American Society of Civil Engineers 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=193805206
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1061/JAEEEZ.ASENG-6886
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Unsteady flow
        Type: general
      – SubjectFull: Interference (Sound)
        Type: general
      – SubjectFull: Dynamic loads
        Type: general
      – SubjectFull: Noise control
        Type: general
      – SubjectFull: Rotors
        Type: general
      – SubjectFull: Vortex motion
        Type: general
    Titles:
      – TitleFull: Unsteady Flow and Noise Interference between the Propfan and the Swirl Recovery Vane.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Zhu, Lei
      – PersonEntity:
          Name:
            NameFull: Liu, Hanru
      – PersonEntity:
          Name:
            NameFull: Chen, Nanshu
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 07
              Text: Jul2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 08931321
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            – Type: volume
              Value: 39
            – Type: issue
              Value: 4
          Titles:
            – TitleFull: Journal of Aerospace Engineering
              Type: main
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