本論文主要的目的在於利用商業套裝軟體CFD-ACE+ 建立一三維軸流式風扇模型，並以提升其風量來反算出其最佳化形狀。由初始扇葉為模型做基礎，來達到預期想增加的風量。對於軸流式風扇整體外觀結構，可以由很多種設計參數來控制，來改變其幾何的形狀。因此在本研究中，吾人將利用反算法，對參數作靈敏性分析，得到欲控制的設計參數。從結果顯示，利用反算法－拉凡格式法設計得到的最佳化形狀，可以提高其風扇的風量，而且其性能也有所改善。最後，為了與數值的部分做驗證比較，將以數值中的初始的形狀與反算後得到的最佳化形狀，利用CNC做出實體，並且做風扇性能的實驗量測。在實驗量測中，選擇以符合AMCA-210-99 標準規範所製造的風洞測試機台來作量測。最後將實驗與數值做比較，其結果顯示，不論是初始、最佳化或者D 扇葉設計風量的最大風量，實驗與數值的誤差都非常小，所以算是達到預期的目標。

The technique of Inverse Design Problem for optimizing the three-dimensional shape of axial-flow fan blade based on the commercial package CFD-ACE+ and the desired air volume flow rate of fan is presented in this work. The desired air volume flow rate of fan can be obtained based on the existing axial-flow fan. The geometry of the redesigned fan blade is generated using numerous design variables, which enables the shape of the fan blade to be constructed completely, thus the technique of parameter estimation for the inverse design problem can be utilized in this study. Results show that by utilizing the redesigned optimal fan blade, the air volume flow rate of fan can be increased and therefore the performance of the axial-flow fan can be improved. Finally the prototypes of the original and optimized axial-flow fan blades are fabricated and the fan performance tests are conducted with these blades on the basis of the AMCA-210-99 standard to verify the validity of this work. The results obtained by the numerical calculations and experimental measurements reveal that they are close enough to each other and this verifies the validation of the present study.

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