極低比速度セミオープン羽根車の内部流れに関する研究

• 崔, 永都

• 黒川, 淳一

• 松井, 純

• 今村, 博

書誌事項

タイトル別名

• キョクテイヒ ソクド セミオープン ハネグルマ ノ ナイブ ナガレ ニ カンスル ケンキュウ
• Internal Flow Characteristics of a Very Low Specific-Speed Semi-Open Impeller

抄録

In the range of very low specific-speed (ns≦100 [m, m3/min, rpm]), performance of a centrifugal pump is much different from that of a normal ns pump. In order to obtain a basic knowledge of pump performance, the internal flow in a semi-open impeller is measured by PIV method and calculated by a commercial CFD code. The results show that strong reverse flow at an impeller outlet is formed and reduces tangential velocity of the absolute flow at an impeller outlet. In the case of β2=90°impeller, a large vortex is formed in the impeller passage at partial flow rate and causes a performance instability. The reverse flow at an impeller outlet brings low angular momentum into an impeller and causes a sharp drop of tangential velocity just before the impeller outlet, which results in a increase of slip factor in the case of β2=30°impeller.

収録刊行物

• ターボ機械

  ターボ機械 31 (1), 43-52, 2003-01

  日本工業出版

キーワード

• Turbomachine
• Centrifugal Pump
• Very Low Specific-Speed
• Semi-Open Impeller
• Performance

詳細情報

• CRID: 1050564287692525696
• NII論文ID: 10010221883
• NII書誌ID: AN00004836
• ISSN: 03858839
• NDL書誌ID: 6417393
• Web Site: http://hdl.handle.net/10131/3763
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6417393
• 本文言語コード: ja
• 資料種別: journal article
• データソース種別:
  • IRDB
  • NDL
  • CiNii Articles