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2001 Fiscal Year Final Research Report Summary

Study on the Development of Automatc Line-Heating System

Research Project

Project/Area Number 10555340
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 船舶工学
Research InstitutionOsaka University

Principal Investigator

OSAWA Naoki  Osaka Univ., Grad. School of Eng., Assoc. Professor, 大学院・工学研究科, 助教授 (90252585)

Co-Investigator(Kenkyū-buntansha) MURAKAWA Hidekazu  Osaka Univ., J. W. R. I., Professor, 接合科学研究所, 教授 (60166270)
HASHIMOTO Kiyoshi  Osaka Univ., Grad. School of Eng., Res. Assistant, 大学院・工学研究科, 助手 (50183554)
TOMITA Yasumitsu  Osaka Univ., Grad. School of Eng., Professor, 大学院・工学研究科, 助教授 (30029251)
DEGUCHI Yoshikazu  Mitsubishi Heavy Industries, Nagasaki Research, 長崎研究所, 主任
NAKACHO Keiji  Osaka Univ., J. W. R. I., Professor, 接合科学研究所, 助教授 (10112070)
Project Period (FY) 1998 – 2000
KeywordsLine-heating / Manufacturing practice / Heat transfer / Finite different method / L.I.F. measurement / Impinging jet
Research Abstract

In order to automate Line-heating process, an estimation method of heat transfer between flame and plate is developed. The major results obtained are as follows.
1) It is found that the temperature distribution near the plate can be estimated by calculating the heat flow of non-combustion impinging-jet in place of the combustion flame. In this approach, it is needed to give the temperature and velocity of the Virtual non-combustion gas at the nozzle exit as the calculation Conditions. For 2-dimensional gas flame, close agreement, between observed and calculated temperature near the plate surface was obtained when the highest temperature within the flame and the velocity of gas mixture at the upstream side of the nozzle was employed as the temperature and velocity of the virtual gas at the exit.
2) It is found that the local heat transfer coefficient can evaluated by the logarithmic law (wall law). Appropriateness of this formulation was proved experimentally for 2-dimensional gas flame.
3) The transient 3-dimensional temperature distribution within the gas flame during line heating is measured in detail by a high performance L.I.F. measurement system. It has been found that the relative distribution of gas temperature around the torch is almost the same as that in spot heating. It has also been found that this relative distribution is almost unchanged regardless of the temperature increase in the steel plate. These results lead us to a new hypothesis that the relative distributions of gas temperature and local heat transfer coefficient around the torch remain unchanged and they are almost the same as those in spot heating during line heating process. A new method of heat input estimation for line heating process based on this hypothesis has been propounded.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 冨田康光, 橋本聖史, 大沢直樹ほか: "線状加熱における加熱ガス炎と鋼板との熱伝達に関する研究"関西造船協会誌. 229. 181-187 (1998)

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      「研究成果報告書概要(和文)」より
  • [Publications] 冨田康光, 橋本聖史, 大沢直樹ほか: "線状加熱における加熱時のガス流場の近似解法に関する研究"日本造船学会論文集. 184. 469-476 (1998)

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      「研究成果報告書概要(和文)」より
  • [Publications] 新海信隆, 冨田康光, 大沢直樹, 橋本聖史ほか: "線状加熱における熱源移動時の加熱ガス流場の解析方法に関する研究"関西造船協会誌. 234. 229-235 (2000)

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      「研究成果報告書概要(和文)」より
  • [Publications] 冨田康光, 大沢直樹, 橋本聖史ほか: "線状加熱における燃焼流場から鋼板への熱移動に関する研究(その2)"日本造船学会論文集. 188. 579-587 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 冨田康光, 大沢直樹, 橋本聖史ほか: "線状加熱における燃焼流場から鋼板への熱移動に関する研究(その3)"日本造船学会論文集. 190. 479-488 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tomita Y., Hashimoto K., Osawa N., Shinkai N. and Sawamura J.: "Study on the Heat Transfer between Gas Flame and Steel Plate during Line Heating Process"J. Kansai Soc. N.A., Japan. No. 229. 181-187 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita Y., Hashimoto K., Osawa N. and Shinkai N.: "Study on heat transfer between gas flame and steel plate during line heating process"Proc. 12th Asian Tech. Exchange and Advisory Meeting, on Marine Structures. 355-364 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita Y., Hashimoto K., Osawa N., Yoshikawa M., Yorozu M., Shinkai N. and Kanada A.: "study on Approximate Analysis of Convective Heat transfer during Line-Heating Process"J. Soc. N. A. Japan. Vol. 184. 469-476 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita, Y.,. Osawa N., Hashimoto K. and Shinkai N.: "Study on approximate method to analyze thermo-flow field during line-heating process"Proc. 9th ISOPE. Vol. 4. 181-186 (1999)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Sinkai N., Tomita Y., Osawa N., Hashimoto K. and Sawamura J.: "Study on Analysis of Therma-Flow Field in Moving a Heat Source during Line-Heating Process"J. Kansai Soc. N. A.. No. 234. 229-235 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita Y., Osawa N., Hashimoto K., Shinkai N., Sawamura J., Tsubouchi D. and Deguchi Y.: "study on Heat Transfer Phenomena between the Combustion Flow Field and the Heating Plate during Line Heating Process (2nd Report)"J. Soc. N. A. Japan. Vol. 188. 579-587 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sinkai N., Tomita Y., Osawa N., Hashimoto K. and Sawamura J.: "Experimental study on thermo-flow field during line heating process by using LIF measurement"Proc. 11th ISOPE. Vol. 4. 595-601

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita Y., Osawa N., Hashimoto K, Shinkai N., Sawamura J., Sugiyama K., Tsubouchi D., Deguchi Y. and Yamaura T.: "Study on Heat Transfer Phenomena between the Combustion Flow Field and the Heating Plate during Line Heating Process (3rd Report)"J. Soc. N. A. Japan. Vol. 190. 479-488 (2001)

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      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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