Simulation of the particle oxidation catalyst POC acoustics

Antti Hynninen, M. Åbom

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)

    Abstract

    The reduction of the exhaust noise from internal combustion engine (IC-engine) is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). It is known from the earlier studies, that the transmission loss of a typical ATD unit can be quite significant. An ATD unit for diesel engines is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POC®). The POC® substrate studied in this paper is of type POC-X, which consists of fine, corrugated metallic wire mesh screens piled askew and rolled into a cylindrical shape. In this paper acoustic two-port simulation models for POC-X are proposed. First model is built up starting from the classical Kirchhoff solution for prediction of the acoustic wave attenuation in narrow channels. According to experimental studies, correction factors to the narrow channel two-port model are proposed. Second model is derived by treating the filter as a lumped acoustic resistance, dependent on the flow resistivity coefficients obtained from the pressure drop measurements.
    Original languageEnglish
    Pages (from-to)368-374
    Number of pages6
    JournalNoise Control Engineering Journal
    Volume62
    Issue number5
    DOIs
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Acoustics
    catalysts
    Equipment and Supplies
    Oxidation
    oxidation
    Catalysts
    acoustics
    fluid filters
    simulation
    Noise
    silencers
    wire cloth
    acoustic attenuation
    internal combustion engines
    wave attenuation
    diesel engines
    transmission loss
    Pressure
    pressure drop
    Internal combustion engines

    Keywords

    • after treatment device
    • acoustics
    • two-port
    • particle oxidation catalyst
    • POC

    Cite this

    @article{dfec45a6fcea4127a7a603bb11082eb7,
    title = "Simulation of the particle oxidation catalyst POC acoustics",
    abstract = "The reduction of the exhaust noise from internal combustion engine (IC-engine) is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). It is known from the earlier studies, that the transmission loss of a typical ATD unit can be quite significant. An ATD unit for diesel engines is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POC{\circledR}). The POC{\circledR} substrate studied in this paper is of type POC-X, which consists of fine, corrugated metallic wire mesh screens piled askew and rolled into a cylindrical shape. In this paper acoustic two-port simulation models for POC-X are proposed. First model is built up starting from the classical Kirchhoff solution for prediction of the acoustic wave attenuation in narrow channels. According to experimental studies, correction factors to the narrow channel two-port model are proposed. Second model is derived by treating the filter as a lumped acoustic resistance, dependent on the flow resistivity coefficients obtained from the pressure drop measurements.",
    keywords = "after treatment device, acoustics, two-port, particle oxidation catalyst, POC",
    author = "Antti Hynninen and M. {\AA}bom",
    note = "Project code: 85942",
    year = "2014",
    doi = "10.3397/1/376236",
    language = "English",
    volume = "62",
    pages = "368--374",
    journal = "Noise Control Engineering Journal",
    issn = "0736-2501",
    publisher = "Institute of Noise Control Engineering",
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    }

    Simulation of the particle oxidation catalyst POC acoustics. / Hynninen, Antti; Åbom, M.

    In: Noise Control Engineering Journal, Vol. 62, No. 5, 2014, p. 368-374.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Simulation of the particle oxidation catalyst POC acoustics

    AU - Hynninen, Antti

    AU - Åbom, M.

    N1 - Project code: 85942

    PY - 2014

    Y1 - 2014

    N2 - The reduction of the exhaust noise from internal combustion engine (IC-engine) is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). It is known from the earlier studies, that the transmission loss of a typical ATD unit can be quite significant. An ATD unit for diesel engines is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POC®). The POC® substrate studied in this paper is of type POC-X, which consists of fine, corrugated metallic wire mesh screens piled askew and rolled into a cylindrical shape. In this paper acoustic two-port simulation models for POC-X are proposed. First model is built up starting from the classical Kirchhoff solution for prediction of the acoustic wave attenuation in narrow channels. According to experimental studies, correction factors to the narrow channel two-port model are proposed. Second model is derived by treating the filter as a lumped acoustic resistance, dependent on the flow resistivity coefficients obtained from the pressure drop measurements.

    AB - The reduction of the exhaust noise from internal combustion engine (IC-engine) is mainly managed by proper silencer design, while less attention is paid to the acoustic performance of the after treatment devices (ATD). It is known from the earlier studies, that the transmission loss of a typical ATD unit can be quite significant. An ATD unit for diesel engines is classically assembled from several specific parts such as selective catalytic reducers (SCR), diesel oxidation catalysts (DOC) and diesel particulate filters (DPF). One new alternative to the conventional DPF is the particle oxidation catalyst (POC®). The POC® substrate studied in this paper is of type POC-X, which consists of fine, corrugated metallic wire mesh screens piled askew and rolled into a cylindrical shape. In this paper acoustic two-port simulation models for POC-X are proposed. First model is built up starting from the classical Kirchhoff solution for prediction of the acoustic wave attenuation in narrow channels. According to experimental studies, correction factors to the narrow channel two-port model are proposed. Second model is derived by treating the filter as a lumped acoustic resistance, dependent on the flow resistivity coefficients obtained from the pressure drop measurements.

    KW - after treatment device

    KW - acoustics

    KW - two-port

    KW - particle oxidation catalyst

    KW - POC

    U2 - 10.3397/1/376236

    DO - 10.3397/1/376236

    M3 - Article

    VL - 62

    SP - 368

    EP - 374

    JO - Noise Control Engineering Journal

    JF - Noise Control Engineering Journal

    SN - 0736-2501

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    ER -