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題 名 | 二維矩形平板散熱片之暫態熱傳分析=Study on Transient Heat Transfer Problem of Two-Dimensional Rectangular Plate Fin |
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作 者 | 蘇榮家; 黃仁智; | 書刊名 | 力學 |
卷 期 | 12:2 1996.06[民85.06] |
頁 次 | 頁291-295 |
分類號 | 440.12 |
關鍵詞 | 矩形平板散熱片; 上表面畢歐數; 根部熱通量; Rectangular plate fin; Top surface biot number; Base heat flux; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要探討二維矩形平板散熱片具有不同上下表面及端部對流熱傳效應,且根 部突受階梯溫度變化之暫態問題。先對無因次統制方程式、初始及邊界條件取拉普拉斯轉換 ,再採用分離變數法求解拉氏無因次溫度分佈;最後利用傅立葉級數法,求其反拉氏轉換。 結果顯示:散熱片溫度分佈隨著上下表面畢歐數比值 (B �� /B �� ) 增加而下降。 上下表 面溫度差除根部與端部附近外均隨著散熱片厚度增加而增加。上下表面畢歐數比值愈大時, 根部熱通量愈高且愈早達到穩定狀態。 |
英文摘要 | This main work is to investigate the transient heat transfer problem with unequal top, bottom and tip surface convection coefficients, and step change in base temperature in two-dimensional rectangular plate fin. The dimensionless governing equation, initial and boundary conditions are first transformed by using Laplace transform technique. The solution of governing equation in the Laplace transformation is attained by the separation of variables. The inverse Laplace transform is solved by utilizing the Fourier series technique. Results show that the temperature distribution in the fin decreases as the ratio of Biot number (B �� /B �� ) increases, the temperature difference between the top and bottom surface increases with increasing the fin thickness except in the region near the fin base and tip. The base heat flux approaches the steady state early when the ratio of the Biot number increases. |
本系統中英文摘要資訊取自各篇刊載內容。