Propagation of acoustic waves in a fluid-filled pipe with periodic elastic Helmholtz resonators

Yu, Dianlong; Shen, Huiyong; Liu, Jiangwei; Yin, Jianfei; Zhang, Zhenfang; Wen, Jihong

doi:10.1088/1674-1056/27/6/064301

Cited by 26 publications

(6 citation statements)

References 27 publications

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“…Helmholtz resonators take advantage of the resonance characteristics of air, and they have good advantages in light weight and low frequency design only by structural design without additional In 2018, Yu et al [40] changed the rigidity of Helmholtz resonators (HRs) and designed a tube with a periodically arranged elastic HR (see Figure 10). Their research found that for a single Helmholtz cavity unit of the same size, the resonant frequency of the elastic HR is much lower than that of the rigid HR.…”

Section: Crystals 2020 10 X For Peer Review 7 Of 26mentioning

confidence: 99%

A Review of Acoustic Metamaterials and Phononic Crystals

2020

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As a new kind of artificial material developed in recent decades, metamaterials exhibit novel performance and the promising application potentials in the field of practical engineering compared with the natural materials. Acoustic metamaterials and phononic crystals have some extraordinary physical properties, effective negative parameters, band gaps, negative refraction, etc., extending the acoustic properties of existing materials. The special physical properties have attracted the attention of researchers, and great progress has been made in engineering applications. This article summarizes the research on acoustic metamaterials and phononic crystals in recent decades, briefly introduces some representative studies, including equivalent acoustic parameters and extraordinary characteristics of metamaterials, explains acoustic metamaterial design methods, and summarizes the technical bottlenecks and application prospects.

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Section: Crystals 2020 10 X For Peer Review 7 Of 26mentioning

confidence: 99%

A Review of Acoustic Metamaterials and Phononic Crystals

2020

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“…[1−4] Researchers have paid a great deal of attention to effect of a flow on acoustic properties of duct systems loaded with HRs, due to the significance of flow effect in many engineering applications. [5,6] Experimental and empirical investigations of a mean flow on transmission loss of a single HR have been studied for a long time. Meyer et al investigated the effect of a flow on the acoustic impedance of an HR.…”

Section: (Received 18 September 2019)mentioning

confidence: 99%

Effect of Mean Flow on Acoustic Wave Propagation in a Duct with a Periodic Array of Helmholtz Resonators*

Liu

Hai-bin

et al. 2020

Chinese Phys. Lett.

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Sound propagation properties of a duct system with Helmholtz resonators (HRs) are affected by mean flow. Previous studies have tended to focus on the effects of mean flows on acoustic response of a duct system with a finite number of HRs. Employing an empirical impedance model, we present a modified transfer matrix method for studying the effect of mean flow on the complex band structure of an air duct system with an infinite periodic array of HRs. The efficiency of the modified transfer matrix is demonstrated by comparison between an example of transmission response calculation for a finite single HR loaded duct and the finite element simulation result calculated using the COMSOL software. Numerical results are presented to analyze the effect of mean flow on the band structure and transmission loss of the sound wave in the duct system. It is hoped that this study will provide theoretical guidance for acoustic wave propagation of HR silencer in the presence of mean flow.

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“…resonator, and side-branch resonator (SBR) are notable in terms of narrow low-frequency sound attenuation due to their inherent acoustic properties [6,7]. But a bulky size is necessary which limits their practical applications.…”

Section: Introductionmentioning

confidence: 99%

Compact broadband acoustic meta-silencer based on synergy between reactive and resistive units

Zhang¹,

Yu²,

Xiao³

et al. 2022

J. Phys. D: Appl. Phys.

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Acoustic silencers are the most effective solution to control noise in ducts. In this paper, we propose a compact acoustic meta-silencer (AMS) based on the synergy between reactive and resistive units that enables the reduction of low-frequency and broadband noise. We first propose a conceptual AMS comprising simple reactive and resistive units to verify its unique sound attenuation performance. To explore its potential for application, we then propose an advanced AMS unit consisting of two independent annular chambers that represent reactive and resistive units, respectively. The synergistic mechanism between reactive and resistive units to achieve superior sound attenuation is revealed. Next, the band structures of the infinite periodic advanced AMS are discussed, and three different types of advanced AMS containing six units are examined. It is demonstrated numerically and experimentally that the optimized AMS with a compact size can achieve a transmission loss (TL) higher than 15 dB over a super-wide low-frequency range (290 Hz–1344 Hz). The work here provides a new avenue for the design of low-frequency and broadband meta-silencers to control the noise in ducts.

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Propagation of acoustic waves in a fluid-filled pipe with periodic elastic Helmholtz resonators

Cited by 26 publications

References 27 publications

A Review of Acoustic Metamaterials and Phononic Crystals

A Review of Acoustic Metamaterials and Phononic Crystals

Effect of Mean Flow on Acoustic Wave Propagation in a Duct with a Periodic Array of Helmholtz Resonators*

Compact broadband acoustic meta-silencer based on synergy between reactive and resistive units

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