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Transient boiling and pressure recovery in a vacuum vessel during cooling of a high temperature body with an impinging jet

Research Project

Project/Area Number 09650249
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionSaga University

Principal Investigator

MONDE Masanori  Saga Univ., Dept.of Mech.Eng.Professor, 理工学部, 教授 (80109222)

Co-Investigator(Kenkyū-buntansha) MITSUTAKE Yuichi  Saga Univ., Dept.of Mech.Eng.Assistant Professor, 理工学部, 助手 (20253586)
MOHAMMED Has (HASAN Mohamm)  佐賀大学, 理工学部, 助教授 (40274576)
HASAN Mohammed  Saga Univ., Dept.of Mech.Eng.Associate Professor
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsTransient boiling / Quenching / Impinging jet cooling / Pressure recovery / 非定常沸騰
Research Abstract

An experimental study has been made on transient heat transfer during cooling of a high temperature (300゚C) cylindrical body mounted in a vacuum vessel with an impinging jet and then recovery of pressure in the vessel. The experiment was carried out for initial pressure of 500 to 1000 Pa, jet velocity of 1 to 15 m/s, jet diameter of 1 to 3 mm, and jet temperature of 10 to 90゚C using water as test liquid. Copper, brass and steel are used as test material in order to check effect of different thermal properties on the transient cooling. The following results are obtained :
1. Characteristics of pressure recovery and heat transfer are categorized in to three regions as
Region A : The pressure recovery is dominated by flush evaporation of superheated liquid. This region finishes at a short time. The heat transfer rate from high temperature body is limited resulting into little evaporation of liquid of jet.
Region B : The pressure recovery is influenced by amount of vapor generated by boiling … More on high temperature disk. Boiling area moves toward outer edge of disk surface with time.
Region C : The pressure recovers to a corresponding state and is kept constant during which heat transfer from the surface becomes forced convective, only.
2. The pressure recovery and heat transfer rate are strongly influenced by test material since the time at which wetting of the high temperature surface starts depends on thermal properties. The heat transfer rate from the surface would be controlled by thermal properties of material.
3. A computation procedure is developed to estimate surface heat flux from transient temperature during cooling, although a time lag exist between surface and measuring points and then is not predicted accurate.
4. A relationship between movement of boiling area and heat transfer rate is made clear, although a time lag between them exists.
5. A model to predict pressure recovery from heat transfer rate during cooling is developed, showing that the value predicted is in good agreement with experimental one. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 門出・Hasan・光武・岩本: "低圧容器内の高温面の衝突噴流冷却中の圧力上昇と熱伝達" 熱工学講演会講演論文集. 97-25. 48-50 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 門出・光武・Hasan・志岐: "ラプラス変換を用いた熱伝導問題の解析的解法" 熱工学講演会講演論文集. 97-25. 177-179 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 門出・Hasan・光武: "Inverse Heat Transfer Problems for Preclicting Heat Transfer during Ingress-of-Codaut-Accident" 1997 Symposim on Fusion Engineering. 200-203 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hasan・門出・光武・岩本: "Anexperi mental study of ingress-of-coolant accident in fusion reactors" Fusion Engineering and Design. 42. 73-81 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 光武・門出・牛嶋: "衝突噴流による高温加熱面の非定常冷却伝熱特性" 第36回日本伝熱シンポジウム講演論文集. (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Monde, M., Hasan, Md, Mitsutake, Y .and Iwamoto, K.: "Rate of pressure recovery and heat transfer during coling of high temperature block in evacuated container" Proc.Themal Engineering Conf.No.97-25. 48-50 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Monde, M., Hasan, Md, Mitsutake, Y.and Iwamoto, K.: "Analytical approach solution with laplace transformation to the inverse problem of heat conduction" Proc.Themal Engineering Conf.No.97-25. 177-179 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Monde, M., Hasan, Md and Mitsutake, Y.: "Inverse heat transfer problem for prediction heat transfer during ingress-of-coolant-accident" Proc.Symposium on Fusion Eng.200-203 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Monde, M., Hasan, Md, Mitsutake Y.and Iwamoto, K.: "An experimental study of ingress-of-coolant accident in fusion reactors" Fusion Engineering and Design. Vol.42. 73-81 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Monde, M., Mitsutake, Y.and Ushijima, H.: "Heat transfer during transient cooling of high temperature surface with an impinging jet" Proc.36th National Heat Transfer. (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 門出・Hasan・光武・岩本: "低圧容器内の高温面の衝突噴流冷却中の圧力上昇と熱伝達" 熱工学講演会講演論文集. 97-25. 48-50 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 門出・光武・Hasan・志岐: "ラプラス変換を用いた熱伝導問題の解析的解法" 熱工学講演会講演論文集. 97-25. 177-179 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 門出・Hasan・光武: "Inverse Heat Transfor Problems for Preclicting Heat Transfer during Ingress-of-codant-Accident" 1997 Symposim on Fusion Engfreering. 200-203 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hasan・門出・光武・岩本: "Anexperi mental study of ingress-of-conlaut accideut in fusion reactors" Fusion Engineering and Design. 42. 73-81 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 光武・門出・牛嶋: "衝突噴流による高温加熱面の非定常冷却伝熱特性" 第36回日本伝熱シンポジウム講演論文集. (印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Monde,et al.: "Inverse Heat Transfer Problems for Predicting Heat Transfer during Ingress-of-Codant Accident." Proc.of 17th IEEE/NPSS Symposium on Fusion Engineering. (予定). (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 門出・Hasan・光武・岩本: "低圧容器内の高温面の衝突噴流冷却中の圧力上昇と熱伝達" 熱工学講演会講演論文集. No.97-25. 48-50 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 門出・光武・Hasan・志岐: "ラプラス変換を用いた熱伝導逆問題の解析的解法" 熱工学講演会講演論文集. No.97-25. 177-179 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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