Acoustic two-port simulation model for the particle oxidation catalyst POC

Antti Hynninen, Mats Åbom

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


    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 (POCr). The substrate used in the POC-X type filter consists of fine, corrugated metallic wire mesh screens piled askew and rolled into a cylindrical shape. In this paper an acoustic two-port simulation model for POC-X is sought 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.
    Original languageEnglish
    Title of host publicationProceedings of 43rd International Congress on Noise Control Engineering
    PublisherAustralian Acoustical Society
    Number of pages7
    ISBN (Print)978-0-909882-04-4
    Publication statusPublished - 2014
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event43rd International Congress on Noise Control Engineering, INTER-NOISE 2014: Improving the World through Noise Control - Melbourne, Australia
    Duration: 16 Nov 201419 Nov 2014


    Conference43rd International Congress on Noise Control Engineering, INTER-NOISE 2014
    Abbreviated titleINTER-NOISE


    • two-port
    • particle oxidation catalyst
    • POC


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