• 作者： Chen, S.L.; Huang, K.M.; Hong, J.T.
• 中文摘要： 本文分析旋轉圓錐體的層流膜狀冷凝熱傳,當圓錐體旋轉時,重力與離心力是造成冷凝液流動的動力。本文採用忽略慣性項之紐塞假設,求得具重力與離心力兩種效應之通解。結果顯示:著名的重力自然冷凝(紐塞解)與旋轉強迫冷凝(史匹羅-哈特內特解)是本分析之特例極限解,其特例解適用範圍以旋轉數定義,當旋轉數小於10/sup -2/,可視為純重力作用模式,紐塞解適用; 當旋轉數大於30,可視為純旋轉效應模式,史匹羅-哈特內特解適用。為了便於應用,本文亦提出同時具重力與旋轉兩種效應時冷凝膜厚度與紐塞值之簡易表示解。
• 英文摘要： This study analyzes film condensation on a rotating cone situated in a large body of pure saturated vapor. The centrifugal field, associated with rotation, and the gravity field sweep the condensate downward along the cone surface. We apply Nusselt-type assumptions in formulating the problem. Results show that the known solutions of gravity-dominated natural condensation (Nusselt solution) and rotation-dominated forced condensation (Sparrow-Hartnett solution) are special cases that fall within the scope of this analysis. We provide criteria are given for the region in which the natural or forced condensation apply. The results show that as the rotation numbers, x.omega./sup 2/(sin.beta.)/sup 2//g/sub e/cos.beta., are smaller than 10/sup -2/, Nusselt solution is applicable. For the case of x.omega./sup 2/(sin.beta.)/sup 2//g/sub e/ cos.beta.>30, Sparrow-Hartnett solution does apply as well as general expressions for predicting film thickness and condensation heat transfer are also presented in the form of approximate formulae for ease of application.
• 中文關鍵字： 膜狀冷凝; 旋轉圓錐體; 史匹羅-哈特內解; 紐塞解; 強迫冷凝
• 英文關鍵字： Film Condensation; Rotation Cone; Nusselt Solution; Sparrow-Hartnett Solution; Forced Condensation