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題名 | 球體在空氣中自然對流熱傳遞 |
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作者姓名(中文) | 潘克湖; | 書刊名 | 中原學報 |
卷期 | 9 1980.12[民69.12] |
頁次 | 頁36-53 |
關鍵詞 | 球體; 熱傳遞; |
語文 | 中文(Chinese) |
中文摘要 | 本文乃研究球體在空氣中自然對流熱傳遞,分別就球體表面為等溫(Constant Temperature),及等熱流(Contant Heat Flux)兩種情況討論之。其邊界層普通微分方程式之導出,乃假設空氣之密度P,乃靜力黏性係數μ均係變值,而坐標之轉換則使係使用 Von Misses 法行之,球體在上述兩種情況下,沿球壁各不同張角之速度溫度分佈,及表面熱傳遞值,均作成曲線,並以兩種不同之近似法分別驗證之。 |
英文摘要 | The present investigation reports the exact and approximate solutions of free-convection over a sphere in air, with the case of uniform surface temperature and the case of uniform heat flux. The ordinary differential boundary-layer equations were obtained by applying Von Misses transformations, with the assumption that the density and viscosity are varied across the boundary layer. Temperature and velocity profiles along the surface as well as the heat transfer are computed for a Prandtl number of 0.7. Two approximate solutions are presented to compare with the exact solution. |
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