Large Engine Exhaust Noise in Real Life and Measurement Techniques in Practice

Zengxin Gao, Kari Saine, Antti Hynninen, Jukka Tanttari

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

    Abstract

    With the increase of low frequency noise importance engine exhaust noise has been discussed moreand more in the industry, especially for large engine manufacturers. For both maritime and powerplant businesses, strict noise regulations are often applied to protect the neighbourhood’s living com-fort. Thus, it is important for the engine manufacturer to understand the engine exhaust noise features,its impact to the surroundings and the way of reliably measuring and informing to customer the engineexhaust noise level. Wärtsilä studied on large engine exhaust gas noise more than a decade ago and arelatively reliable in-duct exhaust noise measurement system has been realised and used for years.Lately in cooperation with VTT, even more knowhow and confidence has been built on this subject.An entire exhaust pipeline system in Wärtsilä Vaasa factory was modelled and the exhaust noisepropagation in the pipeline was calculated. From both simulation and measurement, the challengesand uncertainties of in-duct exhaust noise quantification were revealed. The exhaust pipeline geom-etry and the exhaust gas temperature influence on the noise level were investigated. This paper willstart from the correlation of exhaust noise and environmental noise in real life and mainly discuss onthe in-duct noise propagation features and measurement techniques in practice. The absence of aworldwide guideline for large engine in-duct exhaust noise measurement is addressed and the im-portant factors for achieving reliable exhaust noise information are explained in detail.
    Original languageEnglish
    Title of host publicationProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
    Subtitle of host publicationMontreal bridges, 2019
    PublisherCanadian Acoustical Association
    Number of pages8
    ISBN (Electronic)978-1-9991810-0-0
    Publication statusPublished - 7 Jul 2019
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event26th International Congress on Sound and Vibration, ICSV26 - Montreal, Canada
    Duration: 7 Jul 201911 Jul 2019
    https://iiav.org/archives_icsv/2019_icsv26/indexbd58.html?va=viewpage&vaid=410

    Publication series

    SeriesProceedings of the International Congress on Sound and Vibration
    ISSN2329-3675

    Conference

    Conference26th International Congress on Sound and Vibration, ICSV26
    Abbreviated titleICSV
    CountryCanada
    CityMontreal
    Period7/07/1911/07/19
    Internet address

    Keywords

    • duct
    • engine
    • exhaust simulation
    • measurement

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