Number：

103B_ME1_006

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Name：

Titles：

Author：

鄭澤明、曾憲中、黃彥慈

Tzer-Ming Jeng，Sheng-Cgung Tzeng，Yan-Cih Huang

Paper name：

具合成噴流裝置之LED冷卻器之熱傳性能測試

Name of activity：

2014中華民國航太學會學術研討會

2014AASRC Conference

Keywords：合成噴流、LED散熱座、熱傳、流場觀測。

Synthetic jet，LED heat sink，heat transfer，flow visualization.

Abstract：

本研究以小型揚聲器作為合成噴流驅動裝置，將揚聲器裝置於具徑向輻射鰭片陣列之LED散熱座的中空腔體內，透過函數訊號產生器與擴大機控制輸入揚聲器之週期性電壓的振幅與頻率，在LED散熱座的底板中心有一圓形開口，做為合成噴流的進、出口，如此即構成具合成噴流裝置之LED散熱器，目前的設計經煙流場觀測證明確實有合成噴流自散熱座下方的孔洞噴出，但在熱傳實驗量測時，目前的具合成噴流裝置對LED冷卻器之熱傳性能並沒有實質的助益，這可能是噴出量太小所致，後續將利用馬達風扇取代揚聲器，預計馬達風扇能產生較為可觀的風量，配合目前設計的散熱器構型，應為有明顯的熱傳增強。

The work used a small loudspeaker as the driving device of the synthetic jet. The loudspeaker was installed in the hollow chamber of the LED heat sink with externally radial fin array. Using the signal function generator and the amplifier，the periodical voltages of various frequencies and amplitudes could be input to the loudspeaker. There was a Therefore，a LED cooling module with the synthetic-jet device was built. The smoke flow visualization demonstrated that the present synthetic-jet device did result in the synthetic jet from the bottom hole of the heat sink. However，according to the experimental results of the heat transfer，the present synthetic-jet device seemed to blow too small synthetic jet to enhance the cooling performance of the LED heat sink. If the loudspeaker is replaced by the motor fan，the big amount of air flow will be driven；coupling with the present configuration of the cooling module，it should increase the total heat transfer remarkably.