本研究以田口方法分析有關微氣泡於渠道內減阻效率的參數，以求得最佳穩健參數設計。本文所探討的參數有五個，其中噴氣面積尺寸、孔隙介質的粒徑孔隙及空氣供應量三者為控制因子，流場速度及阻力量測位置視為標示因子。分析結果表示較大的空氣供應量及較小的噴氣面積有助於微氣泡的減阻效果，而孔隙介質的粒徑孔隙對減阻效率影響不大。在最佳參數設計條件下，執行確認實驗的結果顯示，平均減阻效率可達19.3%。經由變異數分析，得知空氣供應量對微氣泡減阻的影響最大，佔整體參數效應的59.48%。

This work analyzed the parameters about the microbubble drag reduction by using the Taguchi method to acquire the optimal robust parametric design. Five parameters were investigated in this paper. Among these parameters, the area of air injection, the porosity of medium and the amount of air injected were regarded in the controllable factors; whereas, the flow speed and the measuring location for shear stress were classified into the indicative factors. Analyses revealed that large air supply and small area of air injection are the best for drag reduction, and the effect of medium porosity is slight. The confirmation experiments were carried out under the condition of the optimum parametric design, and the average
efficiency of drag reduction could reach up to 19.3%. Through the analysis of variance, it was concluded that, the air supply is the greatest contribution to the microbubble drag reduction. The contribution of air supply is 59.48%.