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題 名 | Unsteady Forced Convective Heat Transfer in the Thermal Entrance Region of Rectangular Ducts with Heat Capacity Walls=具熱容效應之矩形管內層流熱進口區暫態強制對流熱傳分析 |
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作 者 | 林振南; 周復初; 曾培元; | 書刊名 | 中正嶺學報 |
卷 期 | 20:2 1992.01[民81.01] |
頁 次 | 頁93-102 |
分類號 | 440.137 |
關鍵詞 | 內層流; 矩形管; 強制; 對流; 暫態; 熱容效應; 熱進口區; 熱傳分析; |
語 文 | 英文(English) |
中文摘要 | 本文是利同數值方法探討具均勻熱通量之水平矩形管內層流熱入口區 之暫態對流熱傳遞。文中管面寬高比值(γ)及管壁與流體熱容比(Cr)倆參數對暫 態熱傳之影響將有詳細之討論。結果以固表顯示該倆參數對鈕瑟數(Nusselt number),流體平均溫度,壁面平均溫度及流體與管壁介面之熱通量等之暫態軸 向變化均有明顯的影響。以上結果可歸因於對流熱傳遞,傳導熱傳遞及流體內能 變化之交互作用。 |
英文摘要 | By use of the numerical lirute ditterence iiietliud, a solution is developed tor the unsteadylaminar forced convective heat transfer in the thermal entrance region of rectangular ducts subjectedlo uniform wall heat flux. The influences of aspect ratio and wall-to-fluid heat capacity ratio on theunsteady heat transfer characteristics are examined in detail. Results for unsteady axial variationsof Nusselt number, fluid bulk temperature, average duct wall temperature and interfacial heat fluxare presented graphically with aspect ratio and heat capacity ratio as parameters. Their effects onthe transient heat transfer characteistics are evidently observed. Results can be comprehensivelyexplained by the interaction between the convective and cross- sectional diffusion energy transport. |
本系統中英文摘要資訊取自各篇刊載內容。