Impact of cavity edges shape on aerodynamic noise

• Autorzy: Łojek Paweł , Czajka Ireneusz

Identyfikatory

DOI

10.21008/j.0860-6897.2022.3.01

• Języki publikacji: EN

Abstrakty

EN

In this article, the analysis of influence of cavity edge shapes on flow-generated noise is performed. The acoustic wave propagation in the channel, that result from the flow, was analyzed. Shape of upstream and downstream edges was modified. The hybrid method based on Navier-Stokes and Perturbed Convective Wave Equation was used to solve the unidirectional coupling. The research showed a significant influence of the modification of the shape of the cavity edges on the generated noise. The change of downstream corner allowed for significant reduction of noise in the entire analysed band and allowed for the reduction of overall sound pressure level (OASPL) by 5 dB. Modifications of the upstream edge did not bring such differences, change in OASPL was up to 1 dB. The obtained spectra of the sound pressure level showed compliance with the calculated natural frequencies of the analysed object, as well as with some of the Rossiter modal frequencies, typical for the phenomena occurring in the cavities.

Słowa kluczowe

EN

aeroacoustics; fluid-acoustic coupling; cavity noise

PL

aeroakustyka; hałas generowany przez komorę

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2022
• Tom: Vol. 33, nr 3
• Strony: art. no. 2022301
• Opis fizyczny: Bibliogr. 26 poz., il. kolor., wykr.

Twórcy

autor

Łojek Paweł

• AGH University of Science and Technology, Department of Power Systems and Environmental Protection Facilities, 30 Mickiewicza Av., 30-059 Kraków, Poland

• https://orcid.org/0000-0002-4291-7816

autor

Czajka Ireneusz

• AGH University of Science and Technology, Department of Power Systems and Environmental Protection Facilities, 30 Mickiewicza Av., 30-059 Kraków, Poland

• https://orcid.org/0000-0003-0013-8467

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).