Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment
Nowadays, fibrous polyester materials are becoming one of the most important alternatives for controlling reverberation time by absorbing unwanted sound energy in the automobile and construction fields. Thus, it is worthy and meaningful to characterize their acoustic behavior. To do so, non-acoustic...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/9/2098 |
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| author | Tao Yang Ferina Saati Jean-Philippe Groby Xiaoman Xiong Michal Petrů Rajesh Mishra Jiří Militký Steffen Marburg |
| author_facet | Tao Yang Ferina Saati Jean-Philippe Groby Xiaoman Xiong Michal Petrů Rajesh Mishra Jiří Militký Steffen Marburg |
| author_sort | Tao Yang |
| collection | DOAJ |
| description | Nowadays, fibrous polyester materials are becoming one of the most important alternatives for controlling reverberation time by absorbing unwanted sound energy in the automobile and construction fields. Thus, it is worthy and meaningful to characterize their acoustic behavior. To do so, non-acoustic parameters, such as tortuosity, viscous and thermal characteristic lengths and thermal permeability, must be determined. Representative panels of polyester fibrous material manufactured by perpendicular laying technology are thus tested via the Bayesian reconstruction procedure. The estimated porosity and airflow resistivity are found in good agreement with those tested via direct measurements. In addition, the homogeneity of polyester fibrous panels was characterized by investigating the mean relative differences of inferred non-acoustic parameters from the direct and reverse orientation measurements. Some parameters, such as tortuosity, porosity and airflow resistivity, exhibit very low relative differences. It is found that most of the panels can be assumed homogeneous along with the panel thickness, the slight inhomogeneity mostly affecting the thermal characteristic length. |
| first_indexed | 2024-03-10T16:19:58Z |
| format | Article |
| id | doaj.art-cf52b50c51154124ad96820a8b02e0bf |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T16:19:58Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-cf52b50c51154124ad96820a8b02e0bf2023-11-20T13:49:12ZengMDPI AGPolymers2073-43602020-09-01129209810.3390/polym12092098Characterization on Polyester Fibrous Panels and Their Homogeneity AssessmentTao Yang0Ferina Saati1Jean-Philippe Groby2Xiaoman Xiong3Michal Petrů4Rajesh Mishra5Jiří Militký6Steffen Marburg7Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 461 17 Liberec, Czech RepublicChair of Vibroacoustics of Vehicles and Machines, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, GermanyLaboratoire d’Acoustique de l’Université du Mans, LAUM-UMR CNRS 6613, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9, FranceDepartment of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicInstitute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 461 17 Liberec, Czech RepublicDepartment of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicDepartment of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 46117 Liberec, Czech RepublicChair of Vibroacoustics of Vehicles and Machines, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstrasse 15, 85748 Garching, GermanyNowadays, fibrous polyester materials are becoming one of the most important alternatives for controlling reverberation time by absorbing unwanted sound energy in the automobile and construction fields. Thus, it is worthy and meaningful to characterize their acoustic behavior. To do so, non-acoustic parameters, such as tortuosity, viscous and thermal characteristic lengths and thermal permeability, must be determined. Representative panels of polyester fibrous material manufactured by perpendicular laying technology are thus tested via the Bayesian reconstruction procedure. The estimated porosity and airflow resistivity are found in good agreement with those tested via direct measurements. In addition, the homogeneity of polyester fibrous panels was characterized by investigating the mean relative differences of inferred non-acoustic parameters from the direct and reverse orientation measurements. Some parameters, such as tortuosity, porosity and airflow resistivity, exhibit very low relative differences. It is found that most of the panels can be assumed homogeneous along with the panel thickness, the slight inhomogeneity mostly affecting the thermal characteristic length.https://www.mdpi.com/2073-4360/12/9/2098Bayesian reconstructionhomogeneityporous materialspolyester fibrous materials |
| spellingShingle | Tao Yang Ferina Saati Jean-Philippe Groby Xiaoman Xiong Michal Petrů Rajesh Mishra Jiří Militký Steffen Marburg Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment Polymers Bayesian reconstruction homogeneity porous materials polyester fibrous materials |
| title | Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment |
| title_full | Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment |
| title_fullStr | Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment |
| title_full_unstemmed | Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment |
| title_short | Characterization on Polyester Fibrous Panels and Their Homogeneity Assessment |
| title_sort | characterization on polyester fibrous panels and their homogeneity assessment |
| topic | Bayesian reconstruction homogeneity porous materials polyester fibrous materials |
| url | https://www.mdpi.com/2073-4360/12/9/2098 |
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