低比速度斜流ディフューザポンプにおける旋回失速挙動

• 宮部 正洋

  酉島製作所

• 古川 明徳

  九州大学

• 前田 英昭

  酉島製作所

• 梅木 勇

  酉島製作所

• 實谷 善則

  酉島製作所

書誌事項

タイトル別名

• A Behavior of the Diffuser Rotating Stall in a Low Specific Speed Mixed-Flow Pump
• テイヒ ソクド シャリュウ ディフューザポンプ ニ オケル センカイ シッソク キョドウ

抄録

The flow instability in a low specific speed mixed-flow pump, having a positive slope of head characteristic curve was investigated. After it was found from pressure measurement that a rotating stall in the vaned diffuser caused the instability, dynamic Particle Image Velocimetry (PIV) measurement and numerical simulation of Computational Fluid Dynamics (CFD) were carried out. Then, the rotating stall is simulated even in CFD and calculated patterns of instantaneous velocities agree well with measured ones by dynamic PIV. It is indicated that a periodical large scaled backflow, generated at the leading edge of the suction surface of the diffuser vane, causes the instability. Moreover, the growth of the strong vortex towards the leading edge of diffuser vane induces the strong backflow from the diffuser outlet to the inlet. The scale of one stall cell is covered over four-passages in thirteen vane-passages.

収録刊行物

• ターボ機械

  ターボ機械 35 (2), 113-121, 2007

  一般社団法人 ターボ機械協会

キーワード

• Mixed flow pump
• Flow instability
• Vaned diffuser
• Rotating stall
• Dynamic PIV
• CFD

詳細情報

• CRID: 1390282679522573824
• NII論文ID: 10018722093
• NII書誌ID: AN00004836
• DOI: 10.11458/tsj.35.113
• ISSN: 18802338
• ISSN: 03858839
• NDL書誌ID: 8663340
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8663340
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可