多重出風口離心式風扇性能之實驗及數值研究

Experimental and Numerical Study of Performance of Multiple-Outlet Centrifugal Fan

蕭名揚(Ming-Yang Hsiao)

指導教授 ： 鄭金祥

大同大學/工程學院/機械工程學系所/碩士(2006年)

摘要

摘要

目前外型輕薄短小且功能強大的電子產品亦受各研發生產廠商所重視，就以筆記型電腦而言，在有限的空間下必須滿足性能的不斷提升，而整個性能的優劣來自CPU處理效能、繪圖及顯示的能力、儲存裝置的速度及容量等，但是性能的增加所帶來的是功率消耗及熱量的提高，而這也是目前產品研發最棘手問題，也是需克服的關鍵技術。
本次研究主要是針對散熱零組件進行評估，其中散熱風扇結構的改變，對於散熱性能及運用方式有著極顯著的關係，而且散熱風扇佔了大部分的成本比例，所以在本論文的研究是設計一多重出風口離心式風扇，希望能處理一個以上的熱源藉以降低零件成本，但在設計過程中我們評估了其實驗分析有不確定的因素，因此我們必須仰賴流體分析軟體的方法來進行設計評估；在本次研究所使用的電腦輔助分析軟體是I-DEAS 的ESC （Electronic Cooling System），並以標準設計的實驗量測確認數值模擬之可靠度。在研究中針對運用性的考量去設計不同出風口角度的配置，及為因應不同需求之散熱量去設計不同高度的流道，並從數值計算得到設計的性能值；如此一方面可從由數值分析去驗證設計結果及流體可視化的呈現，另一方面可縮短設計時間並可累積較多的設計參數作為日後的設計依據。

關鍵字

多重出風口 ； 離心式風扇

並列摘要

Abstract

At present, the electronic products with slim sizes and compact functions are highly emphasized by every R&D maker. Taking NB for example, under limited space, it is required to improve product performance continuously. Thus, the overall performance derives from CPU processing performance, the capabilities of drawing and displaying, and the capacity and speed of storage devices. However, the improved performance also brings with the increased power consumption and heat rise; this aspect is exactly the hardest critical technology issue for R&D to overcome.

This research is mainly aimed to make evaluating effort on components of heat sink devices. Among them, the structural changes of fans are also significantly correlated to the performance and applicable methods of heat sink devices. This part also occupies the major proportion of production cost. The design or this research is to design a multiple outlet centrifugal fan with the capabilities to deal with a more than one heat source so that the production cost can be well decreased. Thus, we have to adopt the fluid analysis software for design evaluation. Within this research, the CAD analysis software we adopt is ECS (Electronic Cooling System) provided by I-DEAS. Also, by using the experimental measurement values of standard design we can confirm the reliability of numeric simulation. Within this research, focusing on the device applicability, we can take it into consideration and design the fans with various outlet angles in layout. Also, in response to various heat sink volumes, we can design the layout with various outlet angles. From numeric calculation, we can reach the performance design values of design. From the said aspect, from numeric analysis, we can examine the design results and the visible representation of fluid. On the other hand, it is available to shorten design duration and accumulate more parameters available for subsequent reference.

並列關鍵字

Centrifugal Fan ； Multiple-Outlet

參考文獻

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