Effects of tapered diffuser vane on the flow field and noise of a centrifugal compressor

Yutaka Ota, Takashi Goto, Eisuke Outa

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    The effects of a three-dimensional tapered diffuser vane on the flow field and noise radiated from a centrifugal compressor are investigated by both CFD analyses and experiments. Tapered diffuser vanes are very useful not only for the reduction of the interaction tone noise but also for the improvement of the pressure recovery characteristics within the diffuser passage. By using tapered diffuser vanes, the interaction area between the impeller-discharge flow and diffuser vanes becomes small, and then the noise level of the discrete tone can be reduced remarkably as a result. Furthermore, by utilizing the visualization technique of vortical structures based on the CFD results, the scale of vortex shedding leaving from the leading edge of the diffuser vanes is found to be contracted and a tendency for the turbulence level to decrease is observed. This may be the cause of the attenuation of broadband noise components. The secondary flow, which is considered to be an obstruction of diffuser pressure recovery, can also be suppressed by the tapered diffuser vanes, and the pressure decrease observed in the throat part of the diffuser passage is further reducible.

    Original languageEnglish
    Pages (from-to)301-308
    Number of pages8
    JournalJournal of Thermal Science
    Volume16
    Issue number4
    DOIs
    Publication statusPublished - 2007 Nov

    Fingerprint

    centrifugal compressors
    flow noise
    vanes
    Centrifugal compressors
    diffusers
    Flow fields
    flow distribution
    Computational fluid dynamics
    Recovery
    Vortex shedding
    Secondary flow
    pressure recovery
    Turbulence
    Visualization
    charge flow devices
    secondary flow
    vortex shedding
    throats
    Experiments
    leading edges

    Keywords

    • Centrifugal compressor
    • CFD
    • Interaction tone noise
    • Tapered diffuser vane
    • Vortical structure

    ASJC Scopus subject areas

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

    Cite this

    Effects of tapered diffuser vane on the flow field and noise of a centrifugal compressor. / Ota, Yutaka; Goto, Takashi; Outa, Eisuke.

    In: Journal of Thermal Science, Vol. 16, No. 4, 11.2007, p. 301-308.

    Research output: Contribution to journalArticle

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