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題名 | Turbulent Mixed Convection Flow and Heat Transfer Between Two Co-Rotating Disks=同軸轉盤間之紊性混合對流熱傳 |
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作者 | 顏維謀; 宋齊有; |
期刊 | 華梵學報 |
出版日期 | 19951100 |
卷期 | 3:1 1995.11[民84.11] |
頁次 | 頁213-225 |
分類號 | 440.137 |
語文 | eng |
關鍵詞 | 同軸轉盤; 混合對流; 紊流熱傳; Co-rotating disks; Mixed convection; Turbulent heat transfer; |
中文摘要 | 本文係以數值方法探討介於雙同軸轉盤間,紊性混合對流流場及熱傳遞。等壁熱 通量及等壁溫兩種熱邊界條件於研究中均有考慮。 研究中,Boussinesq 近似被用來考慮離 心浮力效應,而紊流模式係含有逆向過渡流之混合長度觀念之延伸。文中,離心浮力、旋轉 參數、入口雷諾數及壁面加熱修件對流場結構及熱傳性能有詳細的探討。結果顯示,以往研 究所忽略之離心浮力,對此類流場確實有明顯之影響。 |
英文摘要 | A numerical analysis was performed to investigate the turbulent mixed convection flow and heat transfer between two co-rotating disks. Both thermal boundary conditions of uniform heat flux and uniform wall temperature were considered. In this work, Boussinesq approximation was invoked for taking into account the centrifugal-buoyancy effects. Turbulence modeling was based on extension of classical eddy-viscosity/mixing length concept which reflects the influence of reverse transition. The developing flow and heat transfer performance were examined by the fully-implicit finite difference scheme. The effects of centrifugal buoyancy Gr, rotation number Ro, through-flow Reynolds number Re and wall-heating conditions on the flow structure and heat transfer performance were investigated in detail. Results reveal that the centrifugal-buoyancy, which was ignored in previous studies, has indeed a significant impact on this class of rotating flows. |
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