Radiation of higher order modes from circular ducts with flow
Acta Acustica, ISSN: 2681-4617, Vol: 7
2023
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Researchers from University of Lyon Provide Details of New Studies and Findings in the Area of Acoustics (Radiation of higher order modes from circular ducts with flow)
2023 JUN 23 (NewsRx) -- By a News Reporter-Staff News Editor at Physics Daily News -- Current study results on acoustics have been published. According
Article Description
This work aims to predict the transfer function of a given modal content inside a circular duct with a bellmouth inlet in the presence of a mean flow. The transfer function is the relation in amplitude and phase between a given mode inside the duct and an observer located in the far-field. The numerical solution is obtained by finite element simulation in which the mean flow is input data. Verification is provided by comparison to the analytical solution of an unbaffled circular duct with uniform flow. Influence from various parameters such as the geometry and mean Mach number on the radiated pressure field is investigated. The analytical solution is a good approximation for finding the radiated principal lobe, and the inlet geometry is found to be more important than other parameters such as mean flow when static inlet configuration is studied.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85161006744&origin=inward; http://dx.doi.org/10.1051/aacus/2023011; https://acta-acustica.edpsciences.org/10.1051/aacus/2023011; https://dx.doi.org/10.1051/aacus/2023011; https://acta-acustica.edpsciences.org/articles/aacus/full_html/2023/01/aacus220052/aacus220052.html
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