Aerodynamic performance and noise characteristics of a centrifugal compressor with modified vaned diffusers

Yutaka Ota, Yasuhiko Okutsu, Takashi Goto, Eisuke Outa

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Improvement of aerodynamic performance and reduction of interaction tone noise of a centrifugal compressor with vaned diffusers are discussed by experiments and visualization techniques using a colored oil-film method. The focus of the research is concentrated on the leading edge shape of diffuser vanes that are deeply related to the generation mechanism of the interaction tone noise. The compressor-radiated noise can be reduced by more than ten decibels by using modified diffuser vanes which have 3-D tapered shapes on both pressure and suction surfaces of the leading edge. Furthermore, by adopting the proposed modified diffuser vanes, the secondary flow which is considered to be an obstruction of diffuser pressure recovery can be suppressed, and also the pressure decrease observed in the throat part of the diffuser flow passage is reducible. Thus, the proposed diffuser vanes show a favorable result for both noise and the aerodynamic performance of the centrifugal compressor, and offer a few basic guidelines for the diffuser vane design.

    Original languageEnglish
    Pages (from-to)289-295
    Number of pages7
    JournalJournal of Thermal Science
    Volume15
    Issue number4
    DOIs
    Publication statusPublished - 2006 Dec

    Fingerprint

    centrifugal compressors
    Centrifugal compressors
    diffusers
    aerodynamics
    Aerodynamics
    vanes
    Secondary flow
    Compressors
    Visualization
    leading edges
    Recovery
    pressure recovery
    secondary flow
    throats
    suction
    compressors
    Experiments
    oils
    interactions

    Keywords

    • Centrifugal compressor
    • Noise reduction
    • Tapered diffuser vanes
    • Vaned diffuser

    ASJC Scopus subject areas

    • Engineering (miscellaneous)
    • Statistical and Nonlinear Physics
    • Physics and Astronomy (miscellaneous)

    Cite this

    Aerodynamic performance and noise characteristics of a centrifugal compressor with modified vaned diffusers. / Ota, Yutaka; Okutsu, Yasuhiko; Goto, Takashi; Outa, Eisuke.

    In: Journal of Thermal Science, Vol. 15, No. 4, 12.2006, p. 289-295.

    Research output: Contribution to journalArticle

    Ota, Yutaka ; Okutsu, Yasuhiko ; Goto, Takashi ; Outa, Eisuke. / Aerodynamic performance and noise characteristics of a centrifugal compressor with modified vaned diffusers. In: Journal of Thermal Science. 2006 ; Vol. 15, No. 4. pp. 289-295.
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