本文乃以有限差分法配合最小平方法及溫度實驗數據之逆算法來求得水平加熱板上之矩形鰭片置於具有開孔之矩形外殼內時的強制對流平均熱傳係數、等溫條件下之平均熱傳係數及熱傳效率。由於鰭片上之熱傳係數可能為不均勻分佈，故在進行逆運算之前，整個鰭片先被分割成數個小區域，且假設每個小區域上之熱傳係數為未知的常數。本文使用自行設計之實驗設備來量測對應各種不同鰭片高度或鰭片間距之各量測位置的溫度。之後，將這些溫度量測值代入本文之逆算法來探討外殼之開孔位置與數目對鰭片上之熱傳特性的影響。本文結果顯示於相同的實驗條件下，平均熱傳係數會隨著鰭片間距增加而減少，而等溫條件下之平均熱傳係數 與鰭片熱傳效率則會隨鰭片間距S增加而增加。除此之外，吾人也發現開孔位置對鰭片的散熱效果似乎大於開孔數目，因若開孔位置不佳可能不易讓熱空氣適時的排放出去，以致熱空氣容易聚集在矩形外殼內部，反而造成鰭片某些區域的溫度會攀高。
為了證明本文結果之可靠性，本文之 值將與目前存在之經驗公式或商業計算流體力學軟體所求得之結果相比較。

The inverse method involving the finite difference method in conjunction with the least-squares scheme and experimental temperature measurements is proposed to obtain the unknown forced-convection heat transfer coefficient, heat transfer coefficient under the isothermal condition and fin efficiency on the rectangular fin mounted on a horizontal heating plate in a rectangular enclosure with circular openings. The whole fin is divided into several sub-fin regions before performing the inverse calculation. The unkown heat-transfer coefficient on each sub-fin region is assumed to be a constant. The fin temperatures will be measured for various values of the fin height and fin spacing using the self-designed experimental apparatus. Later, the present inverse method in conjuction with these temperature measurements is applied to investigate the effect of the location and number of openings on the heat-transfer characteristics on the fin. Results show that the forced-convection heat transfer coefficient decreases with increasing the fin spacing under the same experimental conditions. However, the heat transfer coefficient under the isothermal condition and fin efficiency increase with increasing the fin spacing. In addition, it is also found that the effect of the opening location on the heat dissipation may be greater than that of the number of openings. It may be difficult to emit the hot air inside the rectangular enclosure into the ambient provided that the opening location is inappropriate. Under the circumstance, the hot air easily accumulates inside the rectangular enclosure. This result may lead to the rising of the fin temperatures on some sub-regions.
In order to validate the reliability of the present results, the present values are compared with those obtained from the existing correlations or the commercial computational fluid software.

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