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Fluctuating Hydraulic Force Around a Centrifugal Impeller Due to Inlet Flow Distortin and Whirling Motion

Research Project

Project/Area Number 06650214
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionKyushu Institute of Technology

Principal Investigator

KANEMOTO Toshiaki  Kyushu Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (90092642)

Co-Investigator(Kenkyū-buntansha) UNO Mitsuo  Kyushu Institute of Technolnology, Center for Cooperative Research, Research Ass, 地域共同研究センター, 助手 (60142353)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsImpeller / Unsteady Flow / Pump / Fluctuating Flow / Hydraulic Force / Swirling Flow / Shearing Flow
Research Abstract

Unsteady flow behavior in the space between the pump suction casing and the centrifugal impeller side shroud was investigated, to know the fluctuating hydraulic force due to inlet flow distortion and whirling motion. The following results were mainly carried out.
(1)The unsteady core of the inlet swirling flow makes the impeller whirling motion.
(2)The inlet distortion affects strongly the impeller outlet flow. Its effect is extreamly when the swirling direction is negative to the impeller rotation, and the periodical flow fluctuation given by the blade number becomes heavy at the outlet section.
(3)Its fluctuation is conducted to the space between the suction casing and the impeller side shoroud, and causes not only the unsteady axial thrust but also the swirling motion.
(4)The fluctuating pressure value in the space becomes to change in the peripheral direction with increasing the pumping discharge. This penomenon makes the impeller rotation flutter motion.
(5)Above fluctuation lies on another fluctuation induced from the whirling motion of the impeller. The latter fluctuation is sharp in close to the impeller ring.
(6)The avaraged pressure distribution in the radial direction can be predicted roughly with the steady rotating disk model in the cylinder.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 宇野美津夫: "遠心ポンプディフューザ内の圧力変動と羽根車流体力" 第34回ターボ機械講演会講演論文集. 83-88 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 塚本寛: "ディフューザポンプ羽根車下流における圧力脈動" 日本機械学会論文集B編. 61. 1883-1890 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 手島貴典: "遠心ポンプ羽根車とガイドベーンの相互干渉に基づく圧力脈動" 第35回ターボ機械講演会講演論文集. 83-88 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 金元敏明: "低比速度斜流ポンプの案内羽根間流路を通る流れ" 日本機械学会論文集B編. 61. 3876-3883 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Mituo UNO: "Pressure Fluctuation and Impeller Hydraulic Force in the Diffuser(in Japanese)" Proc.34th Conf.on Turbo-machinery. 83-88 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Hiroshi TSUKAMOTO: "Pressure Fluctuation Down-stream of a Diffuser Pump Impeller" Proc.ASME Conf.69. 1425-1436 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takanori TEJIMA: "Pressure Fluctuation Due to Rotor-Stator Interaction in a Diffuser Pump (in Japanese)" Proc.35th Conf.on Turbo-machinery. 83-88 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Toshiaki KANEMOTO: "Flow through Guide Vanes of Low Specific Speed Mixed Flow Pumps (in Japanese)" Trans.JSME. B-61. 3876-3883 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 宇野 美津夫: "遠心ポンプディフューザ内の圧力変動と羽根車流体力" 第34回ターボ機械講演会講演論文集. 83-88 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 塚本 實: "ディフューザポンプ羽根車下流における圧力脈動" 日本機械学会論文集 B編. 61. 1883-1890 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 手島 貴典: "遠心ポンプ羽根車とガイドベーンの相互干渉に基づく圧力脈動" 第35回ターボ機械講演会講演論文集. 83-88 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 金元 敏明: "低比速度斜流ポンプの案内羽根間流路を通る流れ" 日本機械学会論文集 B編. 61. 3876-3883 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 宇野美津夫: "ディフューザポンプ羽根車下流における圧力脈動" 第72期通常総会講演会論文集(日本機械学会). III. (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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