Noise reduction of blade-passing frequency components in a centrifugal blower

Yutaka Ota, Eisuke Outa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    A hybrid-type noise control method is applied to fundamental and higher-order blade-passing frequency components, abbreviated to BPF components, radiated from a centrifugal blower. An active cancellation of the BPF noise source is conducted based on a detailed investigation of the noise source distribution by using correlation analysis. The sound pressure level of 2nd-and/or 3rd-order BPF can be reduced by more than 15 decibels and discrete tones almost eliminate from the power spectra of blower-radiated noise. On the other hand, the sound pressure level of the fundamental BPF is difficult to reduce effectively by the active cancellation method because of the large amplitude of the noise source fluctuation. However, the fundamental BPF is largely influenced by the frequency-response characteristics of the noise transmission passage, and is passively reduced by appropriate adjusting of the inlet duct length. Simultaneous reduction of BPF noise, therefore, can be easily made possible by applying passive and active control methods on the fundamental and higher-order BPF noise, respectively. We also discuss the distribution pattern of BPF noise sources by numerical simulation of flow fields around the scroll cutoff.

    Original languageEnglish
    Title of host publicationProceedings of the ASME Turbo Expo 2004
    Pages1705-1714
    Number of pages10
    Volume5 B
    Publication statusPublished - 2004
    Event2004 ASME Turbo Expo - Vienna
    Duration: 2004 Jun 142004 Jun 17

    Other

    Other2004 ASME Turbo Expo
    CityVienna
    Period04/6/1404/6/17

    Fingerprint

    Blowers
    Noise abatement
    Turbomachine blades
    Acoustic waves
    Acoustic variables control
    Power spectrum
    Acoustic noise
    Ducts
    Frequency response
    Flow fields
    Computer simulation

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Ota, Y., & Outa, E. (2004). Noise reduction of blade-passing frequency components in a centrifugal blower. In Proceedings of the ASME Turbo Expo 2004 (Vol. 5 B, pp. 1705-1714)

    Noise reduction of blade-passing frequency components in a centrifugal blower. / Ota, Yutaka; Outa, Eisuke.

    Proceedings of the ASME Turbo Expo 2004. Vol. 5 B 2004. p. 1705-1714.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ota, Y & Outa, E 2004, Noise reduction of blade-passing frequency components in a centrifugal blower. in Proceedings of the ASME Turbo Expo 2004. vol. 5 B, pp. 1705-1714, 2004 ASME Turbo Expo, Vienna, 04/6/14.
    Ota Y, Outa E. Noise reduction of blade-passing frequency components in a centrifugal blower. In Proceedings of the ASME Turbo Expo 2004. Vol. 5 B. 2004. p. 1705-1714
    Ota, Yutaka ; Outa, Eisuke. / Noise reduction of blade-passing frequency components in a centrifugal blower. Proceedings of the ASME Turbo Expo 2004. Vol. 5 B 2004. pp. 1705-1714
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