Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities
Duct silencers provide effective noise reduction for heating, ventilation and air conditioning systems. These silencers can achieve an excellent sound attenuation through the attributes of their design. The reactive silencer works on the principle of high reflection of sound waves at low frequencies...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research
2022-06-01
|
| Series: | Archives of Acoustics |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/123505/PDF/aoa.2022.141652.pdf |
| _version_ | 1827988864321454080 |
|---|---|
| author | Dhouha Tounsi Wafa Taktak Raja Dhief Mohamed Taktak Mabrouk Chaabane Mohamed Haddar |
| author_facet | Dhouha Tounsi Wafa Taktak Raja Dhief Mohamed Taktak Mabrouk Chaabane Mohamed Haddar |
| author_sort | Dhouha Tounsi |
| collection | DOAJ |
| description | Duct silencers provide effective noise reduction for heating, ventilation and air conditioning systems. These silencers can achieve an excellent sound attenuation through the attributes of their design. The reactive silencer works on the principle of high reflection of sound waves at low frequencies. On the other hand, the dissipative silencer works on the principle of sound absorption, which is very effective at high-frequencies. Combining these two kinds of silencers allowed covering the whole frequency range. In this paper, the effect of liner characteristics composed of a perforated plate backed by a porous material and geometry discontinuities on the acoustic power attenuation of lined ducts is evaluated. This objective is achieved by using a numerical model to compute the multimodal scattering matrix, thus allowing deducing the acoustic power attenuation. The numerical results are obtained for six configurations, including cases of narrowing and widening of a radius duct with sudden or progressive discontinuities. Numerical acoustic power attenuation shows the relative influence of the variation in the values of each parameter of the liner, and of each type of radius discontinuities of ducts. |
| first_indexed | 2024-04-10T00:09:05Z |
| format | Article |
| id | doaj.art-9d3157d0af4a49ff896de10819decae7 |
| institution | Directory Open Access Journal |
| issn | 0137-5075 2300-262X |
| language | English |
| last_indexed | 2024-04-10T00:09:05Z |
| publishDate | 2022-06-01 |
| publisher | Institute of Fundamental Technological Research |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj.art-9d3157d0af4a49ff896de10819decae72023-03-16T12:11:36ZengInstitute of Fundamental Technological ResearchArchives of Acoustics0137-50752300-262X2022-06-01vol. 47No 2223240https://doi.org/10.24425/aoa.2022.141652Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric DiscontinuitiesDhouha Tounsi0Wafa Taktak1Raja Dhief2Mohamed Taktak3Mabrouk Chaabane4Mohamed Haddar5Mechanics, Modelling and Production Laboratory (LA2MP), Mechanical Department, National School of Engineers of Sfax, University of Sfax, Sfax, TunisiaNational School of Engineers of Sfax, University of Sfax, Sfax, TunisiaMechanics, Modelling and Production Laboratory (LA2MP), Mechanical Department, National School of Engineers of Sfax, University of Sfax, Sfax, TunisiaMechanics, Modelling and Production Laboratory (LA2MP), Mechanical Department, National School of Engineers of Sfax, University of Sfax, Sfax, TunisiaFaculty of Sciences of Sfax, Sfax, TunisiaMechanics, Modelling and Production Laboratory (LA2MP), Mechanical Department, National School of Engineers of Sfax, University of Sfax, Sfax, TunisiaDuct silencers provide effective noise reduction for heating, ventilation and air conditioning systems. These silencers can achieve an excellent sound attenuation through the attributes of their design. The reactive silencer works on the principle of high reflection of sound waves at low frequencies. On the other hand, the dissipative silencer works on the principle of sound absorption, which is very effective at high-frequencies. Combining these two kinds of silencers allowed covering the whole frequency range. In this paper, the effect of liner characteristics composed of a perforated plate backed by a porous material and geometry discontinuities on the acoustic power attenuation of lined ducts is evaluated. This objective is achieved by using a numerical model to compute the multimodal scattering matrix, thus allowing deducing the acoustic power attenuation. The numerical results are obtained for six configurations, including cases of narrowing and widening of a radius duct with sudden or progressive discontinuities. Numerical acoustic power attenuation shows the relative influence of the variation in the values of each parameter of the liner, and of each type of radius discontinuities of ducts.https://journals.pan.pl/Content/123505/PDF/aoa.2022.141652.pdfgeometric discontinuities in duct systemsacoustic impedanceporous materialsperforated plateacoustic power attenuation |
| spellingShingle | Dhouha Tounsi Wafa Taktak Raja Dhief Mohamed Taktak Mabrouk Chaabane Mohamed Haddar Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities Archives of Acoustics geometric discontinuities in duct systems acoustic impedance porous materials perforated plate acoustic power attenuation |
| title | Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities |
| title_full | Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities |
| title_fullStr | Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities |
| title_full_unstemmed | Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities |
| title_short | Evaluation of the Acoustic Performance of Porous Materials Lined Ducts with Geometric Discontinuities |
| title_sort | evaluation of the acoustic performance of porous materials lined ducts with geometric discontinuities |
| topic | geometric discontinuities in duct systems acoustic impedance porous materials perforated plate acoustic power attenuation |
| url | https://journals.pan.pl/Content/123505/PDF/aoa.2022.141652.pdf |
| work_keys_str_mv | AT dhouhatounsi evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities AT wafataktak evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities AT rajadhief evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities AT mohamedtaktak evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities AT mabroukchaabane evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities AT mohamedhaddar evaluationoftheacousticperformanceofporousmaterialslinedductswithgeometricdiscontinuities |