Unsteady flow field under surge and rotating stall in a three-stage axial flow compressor

Takayuki Hara, Daisuke Morita, Yutaka Ota, Eisuke Outa

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    The unsteady flow structure between rotor blade-to-blade passages in a three-stage axial flow compressor is experimentally investigated by detailed measurements of unsteady performance characteristics, casing wall pressure fluctuations and their wavelet analyses. The main feature of the test compressor is a capacity tank facility connected in series to the compressor outlet in order to supply compression and/or expansion waves from downstream of the compressor. Research attention is focused on the post-stall characteristics of the surge and rotating stall which occur simultaneously. The influence of the compressor operating point on the unsteady performance curve shows that the surge cycle changes irregularly depending on the steady-state resistance characteristics, and the results of the wavelet analyses of the wall pressure fluctuations suggest that the surge cycle may selectively be determined by the rotating stall cell structure within the rotor cascade.

    Original languageEnglish
    Pages (from-to)6-12
    Number of pages7
    JournalJournal of Thermal Science
    Volume20
    Issue number1
    DOIs
    Publication statusPublished - 2011 Mar

    Fingerprint

    rotating stalls
    turbocompressors
    unsteady flow
    compressors
    flow distribution
    wall pressure
    rotor blades
    cycles
    casing
    outlets
    blades
    elastic waves
    rotors
    cascades
    curves
    cells

    Keywords

    • Axial flow compressor
    • Rotating stall
    • Stall cell
    • Surge
    • Wavelet analysis

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Unsteady flow field under surge and rotating stall in a three-stage axial flow compressor. / Hara, Takayuki; Morita, Daisuke; Ota, Yutaka; Outa, Eisuke.

    In: Journal of Thermal Science, Vol. 20, No. 1, 03.2011, p. 6-12.

    Research output: Contribution to journalArticle

    Hara, Takayuki ; Morita, Daisuke ; Ota, Yutaka ; Outa, Eisuke. / Unsteady flow field under surge and rotating stall in a three-stage axial flow compressor. In: Journal of Thermal Science. 2011 ; Vol. 20, No. 1. pp. 6-12.
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