Effect of incoming wakes on the stator performance in a Singlestage low speed axial flow compressor operating at design and near stall conditions

Guillaume Pallot, Dai Kato, Wataru Kanameda, Yutaka Ota

    研究成果: Conference contribution

    1 引用 (Scopus)

    抜粋

    Unsteady flow phenomena can significantly influence the performance of turbomachines. The convection of the wake coming from a rotor into a downstream stator is one of these phenomena. In the case of compressors, when the rotor wake is transported through a downstream stator, it undergoes viscous mixing and stretching (Smith 1966), which are two mechanisms responsible for its attenuation. The flow field of a low speed single-stage compressor comprising a rotor and a downstream stator is computed using unsteady CFD simulations at design and near stall conditions. Simulations results are compared to steady and unsteady data obtained from yawmeter and hotwire measurements at both rotor and stator exit. The study focuses on the rotor wake attenuation and the related unsteady total pressure loss generated in the stator passage. The loss due to viscous mixing of the rotor wake is calculated analytically using a wake dissipation model. Based on experimental, numerical and analytical results, a break-down of the unsteady total pressure losses is performed for the two operating conditions. Unsteady total pressure losses are classified into two categories. The first category is the loss generated by viscous mixing of the rotor wake and the second one the loss generated by the interactions between the rotor wake and the stator pressure and suction surfaces boundary layers (interaction loss). Results show that the interactions between the rotor wake and the stator surfaces boundary layers play an important part in the unsteady loss generation process and that the contribution of this interaction loss increases from design to near stall condition.

    元の言語English
    ホスト出版物のタイトルTurbomachinery
    出版者American Society of Mechanical Engineers (ASME)
    2D-2016
    ISBN(電子版)9780791849729
    DOI
    出版物ステータスPublished - 2016
    イベントASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 - Seoul, Korea, Republic of
    継続期間: 2016 6 132016 6 17

    Other

    OtherASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
    Korea, Republic of
    Seoul
    期間16/6/1316/6/17

      フィンガープリント

    ASJC Scopus subject areas

    • Engineering(all)

    これを引用

    Pallot, G., Kato, D., Kanameda, W., & Ota, Y. (2016). Effect of incoming wakes on the stator performance in a Singlestage low speed axial flow compressor operating at design and near stall conditions. : Turbomachinery (巻 2D-2016). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2016-57981