An Analysis of Film Boiling around a Vertical Finite-Length Cylinder

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概要

• 論文の詳細を見る

• The film boiling heat transfer from a vertically placed cylinder of finite-length was analyzed to predict the overall heat transfer rate around the cylinder in terms of boiling curve. The overall heat transfer rate around the cylinder was determined semi-empirically by taking into account each convective heat transfer on the bottom, side and top surfaces of the cylinder. The heat transfer rate on the bottom surface was analyzed by the method similar to that developed by the authors for a downward-facing horizontal circular plate. For the vertical lateral surface of the cylinder, Bromley's model was applied and modified to accommodate the continuity of the vapor flow rate at the lower end of the vertical surface of the cylinder, where the vapor film had a finite thickness due to the vapor inflow out of the bottom surface. Berenson's correlation was adopted on the top surface. The effects of length and diameter of the cylinder on the overall heat transfer rate were discussed in terms of boiling curve and the present prediction method was compared with the experimental data obtained by quenching method. The predicted values with the boundary condition of non-slip at the vapor-liquid interface varied within 30 percent, depending on the length and diameter of the cylinder, in terms of average wall heat flux. The prediction agreed reasonably with the experimental data.

• 長崎大学の論文

著者

• Yamada Takashi

  Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima Uni

• 山田 たかし

  長崎大学工学部機械システム工学科

• 茂地 徹

  長崎大学工学部機械システム工学科

• 金丸 邦康

  長崎大工

• Shigechi Toru

  Department Of Mechanical System Of Engineering The Faculty Of Engineering Nagasaki University

• Shigechi Toru

  Dept. Of Mechanical Systems Engineering The Faculty Of Engineering Nagasaki University

• Momoki Satoru

  Department of Mechanical Systems Engineering

• KANEMARU Kuniyasu

  Department of Mechanical Systems Engineering., Nagasaki University

• Yamada Takashi

  Department Of Chemistry Faculty Of Science And Engineering Konan University

• Yamada T

  Department Of Molecular Biotechnology Graduate School Of Advanced Sciences Of Matter Hiroshima Unive

• Yamada T

  National Institute Of Agrobiological Sciences Ministry Of Agriculture Forestry And Fisheries

• Kanemaru Kuniyasu

  Department Of Mechanical Systems Engineering. Nagasaki University

• Yamada Takashi

  Department Of Animal Science Graduate School Of Agricultural Science Kobe University

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