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1991 Fiscal Year Final Research Report Summary

Heat Transfer Characteristics and transition Mode in condensation Curves

Research Project

Project/Area Number 02650150
Research Category

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

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

UTAKA Yoshio  T. I. T., Fac. Engng., Research Associate, 工学部, 助手 (50114856)

Project Period (FY) 1990 – 1991
KeywordsHeat Transfer / Phase Change / Dropwise Condensation / Condensation Curve / Transition / Departing Condensate / Organic Vapor
Research Abstract

An experiment was carried out on the effect of condensate flow from upstream of the condensing surface by using a specially devised condensing block which had relatively large length in the direction of condensate flow. The heat transfer block was composed of thermally independent six copper sub-blocks to measure the local values of heat transfer, and was built to remove the effect of the edge of heat transfer surface. Two kinds of organic vapors, i. e. propylene glycol and ethylene glycol vapors, and octadecanethiol adsorbed on the condensing surface were used as a test vapor and a promoter realizing the lyophobic surface, respectively. The results of the distributions of local heat flux and heat transfer coefficient, the aspect of condensation and the surface fractions covered by condensate flowing from upstream were shown. Further, it was clarified that the number density of the rivulets of depdrting condensate formed in the transition region and the dependencies of maximum heat flux and the surface fraction covered bydeparting condensate at the maximum heat flux point on the direction of condensate flow were determined systematically by using non-dimensional distance normalized by the departing drop diameter.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 宇高 義郎: "凝縮曲線における凝縮液流下の影響に関する研究" 日本機械学会論文集. 57. 661-669 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshio Utaka: "The Effect of Condensate Flow in the Dropwise Condensation Curves." Proc.ASME/JSME Thermal Engineering Confernce. 1. 451-458 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 宇高 義郎: "凝縮曲線における凝縮液流下の影響に関する検討" 第28回日本伝熱シンポジウム講演論文集. 3. 874-876 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 宇高 義郎: "滴状凝縮曲線における流下凝縮液の影響(エチレングリコ-ル蒸気の測定)" 第29回日本伝熱シンポジウム講演論文集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Robert Granger編Y.Utaka他著: "Experiments in Heat Transfer and Thermodynamics" Holt.Reinhart and Winston Book Co.,

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshio Utaka: "The Effect of Departing Condensate in the Condensation Curves" Trans. JSME. 57-534. 661-669 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Utaka: "The Effect of Condensate Flow in the Dropwise Condensation Curves" Proc. ASME/JSME Thermal Engng. Conf.1. 451-458 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Utaka: "The Effect of Condensate Flow in the Condensation Curves" Proc. 28th National Heat Transfer Symposium of Japan. 3. 874-876 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Utaka: "Effect of Departing Condensate in Dropwise Condensation Curve (Measurement for Ethylene Glycol Vapor)" Proc. 29th National Heat Transfer Sysmposium of Japan. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Granger Y. Utaka et. al: Holt, Reinhart and Winston Book Co.Experiments in Heat Transfer and Thermodynamics,

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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