本文針對一組結合雙吸入式離心風扇和散熱片的解熱系統，建立一套完整分析模式。本解熱方式常見於手提電腦和其他電子系統之解熱。由於系統非常複雜，目前常見之研究皆將風扇和散熱片分別研究，此方式無法考慮到風扇出口流場的非均勻性和散熱片對風扇性能的耦合影響，以致於無法得知真實解熱系統的機制，更無法得到最佳完整解熱效率。本文改善以上缺點，考慮離心風扇和散熱片耦合關係，分析完整解熱系統之流場與熱傳遞耦合機制，並探討風扇和散熱片之幾何參數對於散熱系統流場及熱傳遞的影響。此外，研究葉輪的強度和振動，探討葉輪幾何參數和自然頻率、振動模態及結構剛性間的關係。預防發生共振而影響流場及產生噪音，造成風扇和解熱系統的效率下降。本文建立之整套完整分析模式可提供相關研究者及設計者之重要參考。

In this study, a complete cooling model composed of a double-entry centrifugal fan and a longitudinal-plate fin is investigated. The cooling model is popular in the notebook and some electronic systems. Due to the complexity of the coupled system the performance of a fan and a fin are investigated separately in the literature. Because the coupled relation between a fan and a fin and the non-uniform inlet flow field of fin are not considered, the real cooling mechanism and the best cooling efficiency of the system can not be revealed. The above faults are overcome in this study. Moreover, the influence of parameters of fan and fin on the overall flow field and the cooling system are investigated. Finally, the strength and the dynamic analysis of the impeller are made. The influence of the geometer parameters on the natural frequencies and mode shapes are investigated.

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