Rotating Choke and Choked Surge in an Axial Pump Impeller

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Other Title
  • 軸流ポンプ羽根車に生じる旋回チョークとチョークトサージ
  • ジクリュウ ポンプ ハネグルマ ニ ショウジル センカイ チョーク ト チョークトサージ

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Description

Unlike usual turbopump inducers, the axial flow pump tested operates very stably at design flow rate without rotating cavitation nor cavitation surge. Flow visualization suggests that this is because the tip cavity smoothly extends into the flow passage without the interaction with the leading edge of the next blade. However, at low flow rate and low cavitation number, choked surge and rotating choke were observed. Their correlation with the performance curve under cavitation is discussed and their instantaneous flow fields are shown.

Journal

  • Turbomachinery

    Turbomachinery 37 (9), 517-525, 2009

    Turbomachinery Society of Japan

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