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Acoustics of micro-perforated orifice plates
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0001-7898-8643
2018 (English)In: INTER-NOISE 2018 - 47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, Institute of Noise Control Engineering , 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a study on the performance of micro-perforated plates (MMP) aimed for application in heating, ventilation and air-conditioning (HVAC) ducts. MPPs are perforated plates with holes or slits in the sub mm range and perforation ratios between 1-10%. When sound waves penetrate the perforation, friction at the hole surfaces leads to acoustic absorption. As MPPs exhibit high flow resistance together with a thin, stiff, and lightweight structure, they can be used to replace internal support structures in flow duct applications to make them acoustically dissipative with small or negligible leakage of flow across the MPP. Here a micro-perforated circular orifice plate is compared to a similar plate without perforation. The comparison is based on measured multi-port data for the plates including both the scattering as well as the flow generated sound.

Place, publisher, year, edition, pages
Institute of Noise Control Engineering , 2018.
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-241862Scopus ID: 2-s2.0-85059395649OAI: oai:DiVA.org:kth-241862DiVA, id: diva2:1282663
Conference
47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018, Marriott Magnificent Mile DowntownChicago, United States, 26 August 2018 through 29 August 2018
Note

QC 20190125

Available from: 2019-01-25 Created: 2019-01-25 Last updated: 2019-01-25Bibliographically approved

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Lemne, JenniferSack, StefanÅbom, Mats

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