Shuaixing Wang , Yong Xiao , Dazuo Wang , Yanghua Hu , Jihong Wen
{"title":"掠流作用下超低超宽带介孔衬板","authors":"Shuaixing Wang , Yong Xiao , Dazuo Wang , Yanghua Hu , Jihong Wen","doi":"10.1016/j.ijmecsci.2025.110849","DOIUrl":null,"url":null,"abstract":"<div><div>Acoustic meta-liners have received increasing attention in the field of noise control. However, it is still a challenge to design a simple meta-liner (with a few subunits) to achieve broadband low-frequency sound attenuation under wide-speed range grazing flow. This work proposes a type of meta-porous liner (MPL) consisting of perforated panels and coiled-up spaces filled with porous material containing wedge-like impedance modulation channels. An analytical method for predicting acoustic impedance considering fluid-acoustic coupling effects of the MPL is developed. Besides, by employing the analytically predicted acoustic impedance, a finite element model for predicting sound attenuation performance of the MPL under grazing flow is established. Then, sound attenuation performance and mechanism of the MPL are investigated. The strong impedance modulation capability and the acoustic stability under grazing flow together contribute to the efficient sound attenuation of the MPL under wide-speed range grazing flow. A flow tube experiment is conducted to verify the effectiveness of the modeling method and the sound attenuation performance. An MPL specimen (400 mm thickness) is fabricated and measured. It can achieve efficient sound attenuation in the ultra-low and ultra-broadband frequency range of 50‒3000 Hz under grazing flow within Mach number of 0‒0.3. Subsequently, the effects of geometrical and material parameters on acoustic characteristics are analyzed. To meet diverse sound attenuation requirements, a series of MPLs with various thicknesses ranging from 50 mm to 400 mm are designed. They can achieve efficient sound attenuation under wide-speed range grazing flow over ultra-broadband frequency range covering frequencies below 500 Hz or even below 100 Hz. Since the proposed MPLs have simple constructions yet ultra-low and ultra-broadband sound attenuation performance, they have wide application prospects in noise control engineering under grazing flow.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"306 ","pages":"Article 110849"},"PeriodicalIF":9.4000,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultra-low and ultra-broadband meta-porous liner under grazing flow\",\"authors\":\"Shuaixing Wang , Yong Xiao , Dazuo Wang , Yanghua Hu , Jihong Wen\",\"doi\":\"10.1016/j.ijmecsci.2025.110849\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Acoustic meta-liners have received increasing attention in the field of noise control. However, it is still a challenge to design a simple meta-liner (with a few subunits) to achieve broadband low-frequency sound attenuation under wide-speed range grazing flow. This work proposes a type of meta-porous liner (MPL) consisting of perforated panels and coiled-up spaces filled with porous material containing wedge-like impedance modulation channels. An analytical method for predicting acoustic impedance considering fluid-acoustic coupling effects of the MPL is developed. Besides, by employing the analytically predicted acoustic impedance, a finite element model for predicting sound attenuation performance of the MPL under grazing flow is established. Then, sound attenuation performance and mechanism of the MPL are investigated. The strong impedance modulation capability and the acoustic stability under grazing flow together contribute to the efficient sound attenuation of the MPL under wide-speed range grazing flow. A flow tube experiment is conducted to verify the effectiveness of the modeling method and the sound attenuation performance. An MPL specimen (400 mm thickness) is fabricated and measured. It can achieve efficient sound attenuation in the ultra-low and ultra-broadband frequency range of 50‒3000 Hz under grazing flow within Mach number of 0‒0.3. Subsequently, the effects of geometrical and material parameters on acoustic characteristics are analyzed. To meet diverse sound attenuation requirements, a series of MPLs with various thicknesses ranging from 50 mm to 400 mm are designed. They can achieve efficient sound attenuation under wide-speed range grazing flow over ultra-broadband frequency range covering frequencies below 500 Hz or even below 100 Hz. Since the proposed MPLs have simple constructions yet ultra-low and ultra-broadband sound attenuation performance, they have wide application prospects in noise control engineering under grazing flow.</div></div>\",\"PeriodicalId\":56287,\"journal\":{\"name\":\"International Journal of Mechanical Sciences\",\"volume\":\"306 \",\"pages\":\"Article 110849\"},\"PeriodicalIF\":9.4000,\"publicationDate\":\"2025-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Mechanical Sciences\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0020740325009312\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mechanical Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020740325009312","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Ultra-low and ultra-broadband meta-porous liner under grazing flow
Acoustic meta-liners have received increasing attention in the field of noise control. However, it is still a challenge to design a simple meta-liner (with a few subunits) to achieve broadband low-frequency sound attenuation under wide-speed range grazing flow. This work proposes a type of meta-porous liner (MPL) consisting of perforated panels and coiled-up spaces filled with porous material containing wedge-like impedance modulation channels. An analytical method for predicting acoustic impedance considering fluid-acoustic coupling effects of the MPL is developed. Besides, by employing the analytically predicted acoustic impedance, a finite element model for predicting sound attenuation performance of the MPL under grazing flow is established. Then, sound attenuation performance and mechanism of the MPL are investigated. The strong impedance modulation capability and the acoustic stability under grazing flow together contribute to the efficient sound attenuation of the MPL under wide-speed range grazing flow. A flow tube experiment is conducted to verify the effectiveness of the modeling method and the sound attenuation performance. An MPL specimen (400 mm thickness) is fabricated and measured. It can achieve efficient sound attenuation in the ultra-low and ultra-broadband frequency range of 50‒3000 Hz under grazing flow within Mach number of 0‒0.3. Subsequently, the effects of geometrical and material parameters on acoustic characteristics are analyzed. To meet diverse sound attenuation requirements, a series of MPLs with various thicknesses ranging from 50 mm to 400 mm are designed. They can achieve efficient sound attenuation under wide-speed range grazing flow over ultra-broadband frequency range covering frequencies below 500 Hz or even below 100 Hz. Since the proposed MPLs have simple constructions yet ultra-low and ultra-broadband sound attenuation performance, they have wide application prospects in noise control engineering under grazing flow.
期刊介绍:
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content.
In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.