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Effect of oscillating blade on tonal noise of blade cascade with five NACA 0010 profiles

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    0557553 - ÚT 2023 CZ eng C - Conference Paper (international conference)
    Šnábl, Pavel - Pešek, Luděk - Radolf, Vojtěch - Antoš, Pavel - Procházka, Pavel P. - Prasad, Chandra Shekhar
    Effect of oscillating blade on tonal noise of blade cascade with five NACA 0010 profiles.
    Engineering mechanics 2022. Book of full texts. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2022 - (Fischer, C.; Náprstek, J.), s. 377-380. ISBN 978-80-86246-48-2. ISSN 1805-8248. E-ISSN 1805-8256.
    [International Conference Engineering mechanics 2022. Milovy (CZ), 09.05.2022-12.05.2022]
    R&D Projects: GA ČR(CZ) GA20-26779S
    Institutional support: RVO:61388998
    Keywords : aeroacoustics * blade cascade * trailing edge noise * tonal noise * NACA 0010
    OECD category: Applied mechanics
    https://www.engmech.cz/improc/2022/377.pdf

    The airfoil tonal noise is a well known phenomenon which appears on single airfoils in moderate Reynolds numbers at low angles of attack. It can appear on small aircrafts, fans, wind turbines etc. In thispaper, it was observed on a blade cascade consisting of five NACA 0010 profiles placed in a closed rectangular channel with hard walls when for given conditions, i.e. flow velocity and angle of attack, the cascade tunes to one single frequency. During the middle blade oscillation, the single tone splits up to several tones with lower intensity modulated by the excitation frequency. Thus, the oscillation of one blade suppresses the tonal noise generation in the cascade.
    Permanent Link: http://hdl.handle.net/11104/0331679

     
     
Number of the records: 1  

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