On the retrofitted design of a truck muffler with cascaded sub-chambers

X. Yu, Yuhui Tong, Jie Pan, Hongmei Sun, L. Cheng

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    © 2016 Institute of Noise Control Engineering. Mufflers are widely used in engine exhaust systems for providing sound attenuation in a specific frequency range. In this case study, an engineering problem on reducing the noise radiation from a truck is investigated. The original muffler used by the truck consists of four reactive sub-chambers with similar geometries. Both experiments and numerical simulations revealed the narrow band transmission loss (TL) characteristics of the muffler which limit its attenuation performance, resulting in noise leakage at some particular frequencies. With an aim to broadening the attenuation bandwidth, a recently proposed sub-chamber design method is implemented to retrofit the muffler. The inner structure of the muffler is modified under the guidance of numerical simulations, in order to create extra acoustic stop-bands for an overall broadband performance. The retrofitted muffler is experimentally verified with a better TL response in the design frequency of interest. Analyses demonstrate the effectiveness of using the proposed simulation-based design method, which also show potentials to a wide range of muffler design applications.
    Original languageEnglish
    Pages (from-to)602-607
    JournalNoise Control Engineering Journal
    Volume64
    Issue number5
    DOIs
    Publication statusPublished - 1 Sep 2016

    Fingerprint

    Motor Vehicles
    trucks
    Trucks
    Noise
    chambers
    Exhaust systems (engine)
    attenuation
    transmission loss
    Vehicle Emissions
    Mufflers
    mufflers
    engineering
    exhaust systems
    Acoustics
    electromagnetic noise
    Acoustic variables control
    acoustics
    simulation
    Computer simulation
    Radiation

    Cite this

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    title = "On the retrofitted design of a truck muffler with cascaded sub-chambers",
    abstract = "{\circledC} 2016 Institute of Noise Control Engineering. Mufflers are widely used in engine exhaust systems for providing sound attenuation in a specific frequency range. In this case study, an engineering problem on reducing the noise radiation from a truck is investigated. The original muffler used by the truck consists of four reactive sub-chambers with similar geometries. Both experiments and numerical simulations revealed the narrow band transmission loss (TL) characteristics of the muffler which limit its attenuation performance, resulting in noise leakage at some particular frequencies. With an aim to broadening the attenuation bandwidth, a recently proposed sub-chamber design method is implemented to retrofit the muffler. The inner structure of the muffler is modified under the guidance of numerical simulations, in order to create extra acoustic stop-bands for an overall broadband performance. The retrofitted muffler is experimentally verified with a better TL response in the design frequency of interest. Analyses demonstrate the effectiveness of using the proposed simulation-based design method, which also show potentials to a wide range of muffler design applications.",
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    On the retrofitted design of a truck muffler with cascaded sub-chambers. / Yu, X.; Tong, Yuhui; Pan, Jie; Sun, Hongmei; Cheng, L.

    In: Noise Control Engineering Journal, Vol. 64, No. 5, 01.09.2016, p. 602-607.

    Research output: Contribution to journalArticle

    TY - JOUR

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    AU - Yu, X.

    AU - Tong, Yuhui

    AU - Pan, Jie

    AU - Sun, Hongmei

    AU - Cheng, L.

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    AB - © 2016 Institute of Noise Control Engineering. Mufflers are widely used in engine exhaust systems for providing sound attenuation in a specific frequency range. In this case study, an engineering problem on reducing the noise radiation from a truck is investigated. The original muffler used by the truck consists of four reactive sub-chambers with similar geometries. Both experiments and numerical simulations revealed the narrow band transmission loss (TL) characteristics of the muffler which limit its attenuation performance, resulting in noise leakage at some particular frequencies. With an aim to broadening the attenuation bandwidth, a recently proposed sub-chamber design method is implemented to retrofit the muffler. The inner structure of the muffler is modified under the guidance of numerical simulations, in order to create extra acoustic stop-bands for an overall broadband performance. The retrofitted muffler is experimentally verified with a better TL response in the design frequency of interest. Analyses demonstrate the effectiveness of using the proposed simulation-based design method, which also show potentials to a wide range of muffler design applications.

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