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A study on Flashing Phenomenon of Cryogenic Liquid

Research Project

Project/Area Number 08455098
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionMURORAN INSTITUTE OF TECHNOLOGY

Principal Investigator

HANAOKA Yutaka  Muroran Inst.Tech., Mechnical Eng., Proffesor, 工学部, 教授 (60002870)

Co-Investigator(Kenkyū-buntansha) TOKURA Ikuo  Muroran Inst.Tech., Mechnical Eng., Asso.Proffesor, 工学部, 助教授 (00002931)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥5,000,000 (Direct Cost: ¥5,000,000)
KeywordsFlashing / Rapid Depressurization / Mist Formation / Pressure-Undershoot / Pressure Recovery / Boiling
Research Abstract

In the former study related to this research projects, it was pointed out that when liquid was subjected to a rapid reduction of pressure such as a breakdown of cryogenic storage tanks or pipes, a denser mist layr was formed over the liquid surface of vessel in case of extremely high depressurization rates, and that gave a strong influence to a boiling behavior to occur after that. So, in this study, flashing experiments on the relationship between the mist formation and boiling phenomenon was conducted by using the high speed video-camera being purchased during an initial year. And also an attempt have been made to clear the condition of inception of bubble formation under the rapid depressurization processes. In addition, these results are applied to the estimation of their quantities of pressure undershoot and pressure recovery due to the vapor generation along with the liquid boiling in comparison with the numerical simulation model.
Results obtained through this research project ar … More e summarized as follows
1.Experiments were carried out by using two kinds of vessel having the state of different wall roughness. As its result, it was observed that there are remarkable differences in both of pressure transients and mist growth rates even though the same condition. This can be considered due to the effects of the amount of preexsting nuclear sites on the wall surface.
2.As a formation of thermal stratification in cryogenic liquid and making a high temperature of wall surface has not been avoidable because of the imperfect adiabatic wall caused by heat penetration (heat conduction, convection and radiation etc.) from the surroundings, a dependency of the wall charatevistics on the incipient condition of bubble formation appears strongly in comparison with those of normal or high temperature liquid in stored state.
3.The transient pressure changes of the pressure-undershoot and the recovery pressure followed after that within the container may be determined by the mass balance between the vapor delivery rates through the orifice (corresponds to the breakdown and leakage area of vessel and pipes) and the explosive vapor generation rate after its depressurization process. Less

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Y.Hanaoka et al.: "Flashing Experiments of Superheated Liquid under Microgravity Environment" Procs.of 3rd China-Japan Workshop on Microgravity Science. 54-59 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Watanabe et al.: "Flashing Phenomena of Liquid Nitrogen RapidDepressurizations" Procs.of 3rd KSME/JSME Thermal Engineering Confernce. Vol.3. 421-426 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 渡辺 敏晃 ほか2名: "減圧に伴う液体窒素のフラッシング現象、第2報・減圧初期におけるミスト層の形成および液面挙動" 日本機械学会論文集(B). 63・610. 2148-2153 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 森越 義和 ほか3名: "液体窒素の急減圧沸騰に関する実験的研究" 日本機械学会北海道支部第36回講演会梗概集. 171-172 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 森越 義和 ほか3名: "急減圧による液体窒素の沸騰現象に関する実験的研究" 第34回日本伝熱シンポジウム講演論文集. 805-806 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 渡辺 敏晃 ほか3名: "液体窒素のフラッシングに関する実験的研究(壁面性状の違いによる現象への影響)" 第35回日本伝熱シンポジウム講演論文集. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Watanabe, Y.Hanaoka and I.Tokura: "Flashing Phenomenoa of Depressurized Liquid Nitrogen in a Pressure Vessel (2nd Rep., Mist formation and Behavior of Liquid Surface in early depressurization Process)" Trans.of JSME (B). 63-610. 2148-2153 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Watanabe, Y.Hanaoka and I.Tokura: "Flashing Phenomena of Liquid Nitrogen under Rapid Depressurizations" Proc.of 3rd KSME/JSME Thermal Engineering Conference. Vol.3. 421-426 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Hanaoka, I.Tokura and T.Watanabe: "Flashing Experiments of Superheated Liquid under Microgravity Environment" Microgravity Quarterly. 6-2/3. 121-124 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Morikoshi, T.Watanabe, Y.Hanaoka and I.Tokura: "An Experimental Study on Flashing Phenomena of Liquid Nitrogen under Rapid Depressurization Process" Pre-print of 36th Meeting, JSME Hokkaido. No.962-1. 171-172 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Morikoshi, T.Watanabe, Y.Hanaoka and I.Tokura: "An Experimental Study on Flashing Phenomena of Liquid Nitrogen under Rapid Depressurization" Procs.of 34th Symposium on Heat Transfer Society of Japan. 805-806 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Watanabe, Y.Morikoshi, Y.Hanaoka and I.Tokura: "An Experimental Study on Flashing Phenomena of Liquid Nitrogen under Rapid Depressurization Process (Effect of wall roughness on the phenomena)" Procs.of 35th Symposium on Heat Transfer Society of Japan. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Tanino, Y.Hanaoka, I.Tokura and T.Ogawa: "An Experimental Study on Flashed Boiling Phenomena under Microgravity" Proc.of 6th Meeting on Utilization of Short-Term Microgravity. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Tanino, Y.Hanaoka, I.Tokura.and T.Ogawa: "Experiments on Flashed Boiling Phenomena under Microgravity" Proc.of 16th Multiphase Flow Symposium '97. 107-108 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Hanaoka et al.: "Flashing Experiments of Superheated Liquid under Microgravity Environment" Procs.of 3 rd China-Japan Workshop on Microgravity Science. 54-59 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Watanabe et al.: "Flashing Phenomena of Liquid Nitrogen Rapid Depressurizations" Proc.of 3 rd KSME/JSME Thermal Engineering Conference. Vol.3. 421-426 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 渡辺敏晃 ほか2名: "減圧に伴う液体窒素のフラッシング現象、第2報ー減圧初期におけるミスト層の形成および液面挙動" 日本機械学会論文集(B). 63・610. 2148-2153 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 森越義和 ほか3名: "液体窒素の急減圧沸騰に関する実験的研究" 日本機械学会北海道支部第36回講演会梗概集. 171-172 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 森越義和 ほか3名: "急減圧による液体窒素の沸騰現象に関する実験的研究" 第34回日本伝熱シンポジウム講演論文集. 805-806 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 渡辺敏晃 ほか3名: "液体窒素のフラッシングに関する実験的研究(壁面性状の違いによる現象への影響)" 第35回日本伝熱シンポジウム講演論文集. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Toshiaki WATANABE: "FLASHING PHENOMENA OF LIQUID NITROGEN UNDER RAPID DEPRESSURIZATION" Proceedings of 3rd JSME-KSME thermal engineering conference. Vol.3. 421-426 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yutaka HANAOKA: "FLASHING EXPERIMENTS OF SUPERHEATED LIQUID UNDER MICROGRAVITY ENVIRONMENT" Proceedings of 3rd China-Japan Workshop on Microgravity Science. 54-59 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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