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鄭澤明20

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Author：

鄭澤明、曾憲中、劉啟煌、張嘉宏、許冠維

Paper name：

具垂直通氣孔道之徑向鰭片散熱座於內置馬達風扇下之流動速度量測與煙流場觀測

Flow Velocity Measurement and Smoke Flow Visualization of the Radial Finned Heat Sink with a Motor Fan and Vertical Passages

Name of activity：

2014航空科技與飛航安全學術研討會

2014 Aviation Technology and Aviation Safety Seminar

Keywords：鰭柱散熱座、馬達風扇、垂直孔道、流動特性

Finned heat sink,motor fan,vertical passages,flow characteristics

Abstract：本研究出一種新式「垂直通氣孔道之主動式徑向鰭片散熱座」，散熱座以鋁合金製成，其基本構型為中空圓柱具體多個輻射排列徑向鰭片，中空圓柱體內可置入不同尺寸之馬達風扇，配合鋁合金散熱座圓柱體環型壁上之垂直通氣孔道與隔板設計，達到強制氣流進、出散熱座內部的效果。本研究實際量測散熱座上通氣孔道的空氣流速，並以流場觀測技術觀察相關流動特性，實驗結果指出，具馬達風扇之散熱座搭配適當的通氣孔道確實能形成強制氣流，而隔板若未能完整分隔散熱座內部中空腔體，會使馬達風扇無法有效驅動氣流，整體而言，目前的流動特性結果證明作者先前對此新式散熱座完成的熱傳量測結果。

This work proposed a novel active radial finned heat sink with vertical passages.The configuration of the aluminum alloy heat sink was a hollow cylinder with many radial fins.The motor fan was installed into the center chamber of the heat sink.Coupling with the vertical passages in the cylinder wall of the heat sink and the dividing plate,it could lead the air flow though the internal of the heat sink.This work measured the air velocity within vertical passages and performed the flow visualization to investigate the relevant flow characteristics.The results indicated that the present heat sink did result in the forced convection flow.However,the motor fan did not drive flow effective if the dividing plate in the chamber of the heat sink.The present flow-characteristic investigations demonstrate the thermal behaviors studied by the author is previous work.

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