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Study on Air-Water Two-Phase Flow Behaviors in Centrifugal Pumps

Research Project

Project/Area Number 61550124
Research Category

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

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionNagoya University

Principal Investigator

MINEMURA Kiyoshi  Professor, 教養部, 教授 (60023230)

Co-Investigator(Kenkyū-buntansha) 内山 知実  名古屋大学, 教養部, 助手 (90193911)
Project Period (FY) 1986 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1987: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1986: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsMulti-Phase Flow / Centrifugal Pump / 混相流 / 気液二相流 / ボイド率分布 / 三次元流 / 有限要素法 / 速度分布 / 数値流体力学 / 数値解析 / うず巻ポンプ / ターボ機械 / シミュレーション / 斜流ポンプ / 揚程損失比 / 原子炉 / 安全解析 / 汚水処理 / 曝気法
Research Abstract

Centrifugal pumps are originally used for the treament of a single-phase liguid. A pump operating under a two-phase flow condition degrades usually its impeller work and pumping activity, and hence, every careful attensions are to be made to avoid the air entrainment. Recently, relating to the safety analysis of nuclear reactors or to the efficient utilization of sewage pumps in chemical plants, it is necessitated for pumps to work under gas-liquid mixtures, which has been promoted the researches on this subject.
In this research project, a redial-flow pump was tested under air admitting conditions and investigated the mechanism of the change in the performance and the flow patterns. To predict the behavior of air-water two-phase flows in a centrifugal pump impeller, a three-dimensional numerical method is proposed based on a bubbly flow model. If it is assumed that the mixtures are homogeneous bubbly flow entrained fine bubbles against a characteristic length of the impeller channel, then the equations of motion of the mixtures are represented by those of liquid-phase and its velocity is expressed as a potential for a quasi-harmonic equation. The equations are solved by use of finite element method to obtain the velocities, and the equation of motion of an air bubble is integrated numerically in this flow field to obtain the void fraction. The results obtained show good agreement with experients within the range of bubbly flow regime.

Report

(4 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • 1986 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] 峯村吉泰、村上光清、早藤育生、吉田亘: 日本機械学会論文集(B編). 52. 2404-2411 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 峯村吉泰、村上光清、土屋光由: ターボ機械. 15. 477-485 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 峯村吉泰、那波隆之: 日本機械学会論文集(B編). 54. 1378-1384 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 峯村吉泰、内山知実: 混相流シンポジウム188講演論文集(日本機械学会論文集).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 峯村吉泰、内山知実: 混相流シンポジウム'88講演論文集(日本機械学会論文集).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.;Murakami,M: JSME International Journal.Ser.II. 31. 615-622 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.; Kikuyama,K.; Muakami,M.: "Perfornance of a Mixed-flow Pump handling Air-Water Two-Phase Mixtures" Proc.of the 8th Conference on Fluid Machinery. 2. 473-480 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.; Kikuyama,K.; Murakami,M.; Uchiyama,T.: "Flow of Cavitation Bubbles in a Centrifugal Pump Impeller" JSME International Journal, Ser. II. 31. 30-38 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.; Murakami,M.: "Developments in the Research of Air-Water Two-Phase Flows in Turbomachinery" JSME International Journal, Ser. II. 31. 615-622 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.; Uchiyama,T.: "Three-Dimensional Calculation of Air-Water Two-Phase Flow in Centrifugal Pump Impeller Based on a Bubbly Flow Model (1st Report, Distributions of Pressure and Void Fraction)" Trans. ASME, Journal of Turbonachinery. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Minemura,K.; Uchiyama,T.: "Three-Dimensional Calculation of Air-Water Two-Phase Flow in Centrifugal Pump Impeller Based on a Bubbly Flow Model (2nd Report, Prediction of Pump Performance)" Trans. ASME, Journal of Turbomachinery. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 峯村吉泰: 日本機械学会論文集(B編). 54. 1325-1331 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: 混相流シンポジウム'88(日本機械学会論文集). 7. 65-68 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: 混相流シンポジウム'88(日本機械学会論文集). 7. 69-72 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: Trans.ASME,Townal of Turhomachinery.

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: Trans.ASME,Jural of Turbomachinery.

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: JSME International Journal.Seri'es II. 31. 615-622 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 峯村吉泰: 日本機械学会論文集. 53. 1878-1886 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 峯村吉泰: ターボ機械. 15. 477-485 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 峯村吉泰: Proc. of 8th Conference on Fluid Machinery. 8-2. 473-480 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 峯村吉泰: International Journal of Society of Mechanical Engineering. 31. 30-38 (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 峯村吉泰: 日本機械学会論文集. (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 峯村吉泰: 日本機械学会論文集. (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] K.Minemura: Proc.of the International Symposium on Cavitation,Sendai. 281-286 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] K.Minemura: Proc.of the 1986 Covitation and Multiphase Flow Forum ASME,Atlanta. (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 峯村吉泰: 日本機械学会論文集,B編. 52巻478号. 2404-2411 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 峯村吉泰: ターボ機械. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 峯村吉泰: 日本機械学会論文集,B編. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] K.Minemura: Proc.of the 8th Conference on Fluid Machinery,Budapest.(1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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