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鄭澤明14

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鄭澤明、曾憲中、許冠維

Paper name：

氣流通過具多個發泡鋁材塊之180度圓形轉彎通道之流場觀測實驗

Flow Visualization of Fluid Flow through the 180-deg round turned channel with discrete aluminum-foam blocks

Name of activity：

中華民國第24屆燃燒與能源學術研討會

ROC 24th Symposium on Combustion and Energy

Keywords：流場觀測、180度專彎通道、發泡鋁材塊

Flow visualization, 180-deg turned channel, aluminum-foam blocks.

Abstract：180度轉彎通道的熱傳增益研究多年受廣泛的關注，而熱傳效能與冷流流動特性有顯著的關聯，本研究以實驗方法探討氣流通過多個發泡鋁材塊之180度圓形轉彎通道之流體特性，以空氣為工作流體，在槽道截面寬度比為1之180度圓形轉彎通道內裝置多個發泡鋁材塊(孔隙率為0.90；孔密度10 PPI)，共計有2種通道構型進行煙流場觀測實驗，實驗果指出，氣流流動特性強烈受到發泡鋁材塊排列方式的影響，研究結果可用來解釋相關德傳特徵，並做為相關冷卻設計的參考依據。

The issue about the heat transfer enhancement in a 180-deg turned channel has attracted many attentions. The heat transfer capacity is influenced strongly by the behavior of the fluid flow. This work experimentally investigated the fluid flow characteristics in a 180-deg round turned channel with discrete aluminum-foam blocks. The air was used as coolant. Several aluminum-foam blocks (0.90 porosity and 10 PPI pore density) were installed discretely in the 180-deg round turned channel with the square cross section. Total two kinds of test section were employed to perform the flow visualizations. The results indicate that the arrangement of aluminum-foam blocks impacts on the flow pattern remarkably. The transfer characteristics of such aluminum-foam channel, and be the referred base of the relevant cooling designs.

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