Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct
The proximity of obstacles in a ventilation network can result in a significant increase of the noise production. In this paper, a tandem diaphragm inserted in a rigid duct with rectangular cross section is investigated and compared to a single diaphragm obstruction. The disturbed flow which reaches...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2024-01-01
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| Series: | Acta Acustica |
| Subjects: | |
| Online Access: | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2024/01/aacus230054/aacus230054.html |
| _version_ | 1797315713351811072 |
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| author | de Reboul Silouane Perrey-Debain Emmanuel Ville Jean-Michel Zerbib Nicolas Hugues Florian Moreau Stéphane |
| author_facet | de Reboul Silouane Perrey-Debain Emmanuel Ville Jean-Michel Zerbib Nicolas Hugues Florian Moreau Stéphane |
| author_sort | de Reboul Silouane |
| collection | DOAJ |
| description | The proximity of obstacles in a ventilation network can result in a significant increase of the noise production. In this paper, a tandem diaphragm inserted in a rigid duct with rectangular cross section is investigated and compared to a single diaphragm obstruction. The disturbed flow which reaches the second obstacle causes an amplification of the radiated noise which goes beyond a simple doubling of the power. Experimental results, carried with various spacing between the two diaphragms and bulk velocity, allows identifying other aeroacoustic source mechanisms which does not appear with a single diaphragm. Depending on the configuration, the broadband level can increase by more than 10 dB and feedback phenomena can appear at low frequency. Explanations and illustrations of those phenomena are given thanks to compressible-fluid simulations. |
| first_indexed | 2024-03-08T03:08:49Z |
| format | Article |
| id | doaj.art-5086907b04ee48b0a2cbc7fb89a2fd50 |
| institution | Directory Open Access Journal |
| issn | 2681-4617 |
| language | English |
| last_indexed | 2024-03-08T03:08:49Z |
| publishDate | 2024-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Acta Acustica |
| spelling | doaj.art-5086907b04ee48b0a2cbc7fb89a2fd502024-02-13T08:18:33ZengEDP SciencesActa Acustica2681-46172024-01-018710.1051/aacus/2023062aacus230054Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular ductde Reboul Silouane0https://orcid.org/0000-0002-8087-2655Perrey-Debain Emmanuel1Ville Jean-Michel2Zerbib Nicolas3Hugues Florian4Moreau Stéphane5Université de Technologie de Compiègne, Laboratoire RobervalUniversité de Technologie de Compiègne, Laboratoire RobervalESI-GroupESI-GroupNaval Group, Technopôle de la merUniversité de SherbrookeThe proximity of obstacles in a ventilation network can result in a significant increase of the noise production. In this paper, a tandem diaphragm inserted in a rigid duct with rectangular cross section is investigated and compared to a single diaphragm obstruction. The disturbed flow which reaches the second obstacle causes an amplification of the radiated noise which goes beyond a simple doubling of the power. Experimental results, carried with various spacing between the two diaphragms and bulk velocity, allows identifying other aeroacoustic source mechanisms which does not appear with a single diaphragm. Depending on the configuration, the broadband level can increase by more than 10 dB and feedback phenomena can appear at low frequency. Explanations and illustrations of those phenomena are given thanks to compressible-fluid simulations.https://acta-acustica.edpsciences.org/articles/aacus/full_html/2024/01/aacus230054/aacus230054.htmlduct acousticsflow-induced noisedirect noise computationfeedback loop |
| spellingShingle | de Reboul Silouane Perrey-Debain Emmanuel Ville Jean-Michel Zerbib Nicolas Hugues Florian Moreau Stéphane Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct Acta Acustica duct acoustics flow-induced noise direct noise computation feedback loop |
| title | Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| title_full | Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| title_fullStr | Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| title_full_unstemmed | Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| title_short | Experimental and numerical observation of flow-acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| title_sort | experimental and numerical observation of flow acoustics feedback phenomena due to two diaphragms in tandem inserted in a rectangular duct |
| topic | duct acoustics flow-induced noise direct noise computation feedback loop |
| url | https://acta-acustica.edpsciences.org/articles/aacus/full_html/2024/01/aacus230054/aacus230054.html |
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