Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower

Yutaka Ota, Eleuke Outa, Klyohiro Tajima

    研究成果: Conference contribution

    抄録

    The blade-passing frequency noise, abbreviated to BPF noise, of low specific speed centrifugal blower is analyzed by separating the frequency-response of the transmission passage and the intensity of the noise source. Frequency-response has previously been evaluated by the authors using a onedimensional linear wave model, and the results have agreed well with the experimental response in a practical range of the blower speed. In the present study, the intensity of the noise source is estimated by introducing the quasi-steady model of the blade wake impingement on the scroll surface. The effective location of the noise source is determined by analyzing the cross-correlation between measured data of the blower suction noise and pressure fluctuation on the scroll surface. Then, the surface density distribution of a dipole noise source is determined from pressure fluctuation expressed in terms of quasi-steady dynamic pressure of the traveling blade wake. Finally, the free-field noise level is predicted by integrating the density spectrum of the noise source over the effective source area The sound pressure level of the blower suction noise is easily predicted by multiplying the free-field noise level by the frequency-response characteristics of the noise transmission passage.

    元の言語English
    ホスト出版物のタイトルProceedings of the ASME Turbo Expo
    出版者American Society of Mechanical Engineers (ASME)
    1
    ISBN(印刷物)9780791878835
    DOI
    出版物ステータスPublished - 1994
    イベントASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, GT 1994 - The Hague, Netherlands
    継続期間: 1994 6 131994 6 16

    Other

    OtherASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, GT 1994
    Netherlands
    The Hague
    期間94/6/1394/6/16

    Fingerprint

    Blowers
    Turbomachine blades
    Frequency response
    Acoustic noise
    Acoustic waves

    ASJC Scopus subject areas

    • Engineering(all)

    これを引用

    Ota, Y., Outa, E., & Tajima, K. (1994). Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower. : Proceedings of the ASME Turbo Expo (巻 1). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/94-GT-334

    Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower. / Ota, Yutaka; Outa, Eleuke; Tajima, Klyohiro.

    Proceedings of the ASME Turbo Expo. 巻 1 American Society of Mechanical Engineers (ASME), 1994.

    研究成果: Conference contribution

    Ota, Y, Outa, E & Tajima, K 1994, Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower. : Proceedings of the ASME Turbo Expo. 巻. 1, American Society of Mechanical Engineers (ASME), ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition, GT 1994, The Hague, Netherlands, 94/6/13. https://doi.org/10.1115/94-GT-334
    Ota Y, Outa E, Tajima K. Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower. : Proceedings of the ASME Turbo Expo. 巻 1. American Society of Mechanical Engineers (ASME). 1994 https://doi.org/10.1115/94-GT-334
    Ota, Yutaka ; Outa, Eleuke ; Tajima, Klyohiro. / Evaluation and prediction of blade-passing frequency noise generated by a centrifugal blower. Proceedings of the ASME Turbo Expo. 巻 1 American Society of Mechanical Engineers (ASME), 1994.
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