• 作者： Chou, Chen-Chung; Yang, Yu-Min
• 中文摘要： 本文中使用微熱電偶測定界面活性劑水溶液的池式核沸騰時,緊鄰水平加熱面的過熱邊界層中的溫度分布。結果發現在較高濃度的界面活性劑水溶液中,過熱邊界層厚度與熱通量之間有不尋常的關係。此一趨勢以及過熱邊界層中溫度變動幅度隨濃度和熱通量變化的情形,顯示界面活性劑水溶液的核沸騰的熱傳機構與純水極為不同。本文提出一個包含微層蒸發的簡單熱傳模式,用以分析界面活性劑對水的核沸騰機構的影響。並因此對界面活性劑促進水的核沸騰熱傳的效應獲得了進一步的了解。
• 英文摘要： The temperature profiles within the superheated boundary layer adjacent to a horizontal heating surface in nucleate pool boiling of aqueous SLS (sodium lauryl sulfate) surfactant solutions were determined experimentally in this work by a microthermocouple. An unusual trend of the thickness of the superheated boundary layer (.delta.) with heat flux for surfactant solutions of higher concentrations is observed. This and the variations of amplitude of the temperature fluctuations within the superheated boundary layer with concentration and heat flux lend themselves to a suggestion that a different mechanism may control the nucleate boiling heat transfer of water with surfactant additive. A simple heat transfer model including microlayer evaporation is proposed to analyze the surfactant effects on the mechanism of nucleate boiling. Better understanding of the enhancement of nucleate boiling heat transfer of water by the addition of surfactant additive has been achieved.
• 中文關鍵字： 池式核沸騰; 過熱邊界層; 溫度分布; 界面活性劑效應; 熱傳
• 英文關鍵字： Nucleate Pool Boiling; Superheated Boundary Layer; Temperature Profile; Surfactant Effect; Heat Transfer