Performance and noise emission analysis of coaxial co-rotating propellersa).
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| Title: | Performance and noise emission analysis of coaxial co-rotating propellersa). |
|---|---|
| Authors: | Beni, Andrea1 (AUTHOR) andrea.beni@vki.ac.be, Bresciani, Andrea P. C.1 (AUTHOR), Christophe, Julien1 (AUTHOR), Schram, Christophe1 (AUTHOR) |
| Source: | Journal of the Acoustical Society of America. May2026, Vol. 159 Issue 5, p3910-3924. 15p. |
| Subjects: | Propellers, Interference (Sound), Aerodynamics, Acoustic radiation, Drone aircraft, Acoustic radiators, Propulsion systems |
| Abstract: | The trade-off between performance and noise emissions has progressively established itself as a key factor in the emergence of Urban Air Mobility. This work addresses the relationship between the propulsive efficiency and noise emissions of drone-sized coaxial, co-rotating propellers operating in hover, for varying phase offset ϕ and axial separation Δ z between the rotors. Experimentally, an antagonistic behavior emerged between power loading and broadband noise, while a modulation of the tonal noise with varying phase offset was observed. The physical mechanism modulating tonal noise is explained using an analytical approach accounting for the acoustic interferences that occur for unevenly spaced rotors, based on Goldstein's formulation for the tonal noise generated by rotating dipole sources. Furthermore, a combination of a commercial panel method and a rotating dipole source model is proposed as a fast-turnaround approach to predict aerodynamic loads and tonal noise. The acoustic predictions obtained for the second shaft harmonic are consistent with the experimental trends, given the inherent limitations of the solver employed, and assess the potential of the proposed method for a multidisciplinary early-stage design phase. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194178251 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Performance and noise emission analysis of coaxial co-rotating propellersa). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Beni%2C+Andrea%22">Beni, Andrea</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> andrea.beni@vki.ac.be</i><br /><searchLink fieldCode="AR" term="%22Bresciani%2C+Andrea+P%2E+C%2E%22">Bresciani, Andrea P. C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Christophe%2C+Julien%22">Christophe, Julien</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schram%2C+Christophe%22">Schram, Christophe</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. May2026, Vol. 159 Issue 5, p3910-3924. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Propellers%22">Propellers</searchLink><br /><searchLink fieldCode="DE" term="%22Interference+%28Sound%29%22">Interference (Sound)</searchLink><br /><searchLink fieldCode="DE" term="%22Aerodynamics%22">Aerodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+radiation%22">Acoustic radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Drone+aircraft%22">Drone aircraft</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+radiators%22">Acoustic radiators</searchLink><br /><searchLink fieldCode="DE" term="%22Propulsion+systems%22">Propulsion systems</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The trade-off between performance and noise emissions has progressively established itself as a key factor in the emergence of Urban Air Mobility. This work addresses the relationship between the propulsive efficiency and noise emissions of drone-sized coaxial, co-rotating propellers operating in hover, for varying phase offset ϕ and axial separation Δ z between the rotors. Experimentally, an antagonistic behavior emerged between power loading and broadband noise, while a modulation of the tonal noise with varying phase offset was observed. The physical mechanism modulating tonal noise is explained using an analytical approach accounting for the acoustic interferences that occur for unevenly spaced rotors, based on Goldstein's formulation for the tonal noise generated by rotating dipole sources. Furthermore, a combination of a commercial panel method and a rotating dipole source model is proposed as a fast-turnaround approach to predict aerodynamic loads and tonal noise. The acoustic predictions obtained for the second shaft harmonic are consistent with the experimental trends, given the inherent limitations of the solver employed, and assess the potential of the proposed method for a multidisciplinary early-stage design phase. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics 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: 10.1121/10.0043731 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 3910 Subjects: – SubjectFull: Propellers Type: general – SubjectFull: Interference (Sound) Type: general – SubjectFull: Aerodynamics Type: general – SubjectFull: Acoustic radiation Type: general – SubjectFull: Drone aircraft Type: general – SubjectFull: Acoustic radiators Type: general – SubjectFull: Propulsion systems Type: general Titles: – TitleFull: Performance and noise emission analysis of coaxial co-rotating propellersa). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Beni, Andrea – PersonEntity: Name: NameFull: Bresciani, Andrea P. C. – PersonEntity: Name: NameFull: Christophe, Julien – PersonEntity: Name: NameFull: Schram, Christophe IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00014966 Numbering: – Type: volume Value: 159 – Type: issue Value: 5 Titles: – TitleFull: Journal of the Acoustical Society of America Type: main |
| ResultId | 1 |
