自由対流表面沸騰の研究

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タイトル別名
  • Heat Transfer in Surface Boiling under Free Convection
  • ジユウ タイリュウ ヒョウメン フットウ ノ ケンキュウ

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Through an experiment of nucleate boiling under free convection in subcooled water, we came to the following conclusions : (1) The effective stirring length of bubbles in surface boiling is reasonably estimated to be one-third of their condensing height which is decided identically with the degree of subcooling of bulk water. (2) Correlation of heat transfer in surface boiling by using Δθs instead of Δθ corresponds to the replacing of He by Hes, where Δθs=temperature difference between heating surface and saturated liquid, Δθ=temperature difference between heating surface and bulk liquid, He=effective stirring length of bubbles in saturated boiling, Hes=effective stirring length of bubbles in surface boiling. From these conclusions, we derived an extention of author's correlating equation of nucleate boiling transfer, and confirmed that it fairly agreed with the experimental results in surface boiling.

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