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2001 Fiscal Year Final Research Report Summary

Numerical Investigation of Turbulent Combustion during Line Heating Process

Research Project

Project/Area Number 12450401
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 船舶工学
Research InstitutionOsaka University

Principal Investigator

TOMITA Yasumitsu  Graduate School of Engineering, Osaka University, Professor, 大学院・工学研究科, 教授 (30029251)

Co-Investigator(Kenkyū-buntansha) HASHIMOTO Kiyoshi  Graduate School of Engineering, Osaka University, Assistant Prof., 大学院・工学研究科, 助手 (50183554)
OSAWA Naoki  Graduate School of Engineering, Osaka University, Assoc. Prof., 大学院・工学研究科, 助教授 (90252585)
Project Period (FY) 2000 – 2001
KeywordsLine heating / Heat transfer / CFD / LIF / Combustion model / Turbulence model
Research Abstract

The aim of this study is to develop a method of numerical investigation of the heat transmission from the heating gas to the plate during line-heating process.
New modified-eddy-dissipation combustion model is proposed. The validity of the proposed model is demonstrated by comparing the calculated and measured gas temperature during spot heating.
The transient temperature distribution is measured using a LIF apparatus in oxygen-methane gas flame from a torch moving linearly. The changing nature of temperature field during spot and line heating is investigated closely and carefully.
The effectiveness of low-Reynolds number k-ε turbulence model is also investigated.
As results, the followings are found ;
1) From the result of L.I.F. measurement, 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 s … More teel plate.
2) The above result leads 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, by which plate temperature distribution history can be accomplished for desired plate shape, dimensions, and torch movement history, solely from spot heating experimental results, has been propounded.
3) The calculated gas temperature distribution during spot heating is in good agreement with measured one when proposed modified-eddy-dissipation combustion model is employed. It is preferable to employ the proposed model in analysis of impinging jet flame during line heating process.
4) The calculation result in which low-Reynolds number k-e turbulence model is employed shows that heat flow in the immediate neighborhood of the plate surface is greatly affected by turbulent flow. This suggests that the precision of gas temperature and heat transmission calculation within the turbulent boundary layer can be improved by employing low-Reynolds number k-e turbulence model. Less

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 澤村淳司, 冨田康光, 大沢直樹, 橋本聖史ほか: "線状加熱における衝突噴流火炎場の燃焼解析法に関する研究"日本造船学会論文集. 190. 489-497 (2001)

    • 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] 澤村淳司, 冨田康光, 大沢直樹, 橋本聖史ほか: "線状加熱における衝突噴流火炎の温度場推定法に関する研究"第14回計算力学講演論文集. 585-586 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sawamura J., Tomita Y., Osawa N., Hashimoto K.: "Study on Combustion Analysis in the Impinging Jet Flame during Line Heating Process"The Proceeding of the 12th International Offshore and Polar Engineering Conference. IV. 247-252 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sawamura J., Tomita Y., Osawa N., Hashimoto K. et al.: J. SNAJ. 190. 489-497 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomita Y., Osawa N., Hashimoto K. et al.: J. SNAJ. 190. 479-488 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sawamura J., Tomita Y., Oswawa N., Hashimoto K. et al.: Proc. JSME 14th Compu. Mech. Conf.. 585-586 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sawamura J., Tomita Y., Osawa N., Hashimoto K.: Proc. 12th ISOPE, IV. 247-252 (2002)

    • Description
      「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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