Cooling by micro-channel heat sink transfers excess heat flux in electrical devices and increases their functional capacity, reliability, and life span. In this paper, AlSi10Mg powders were employed to create four micro-channel heat sinks with cross-sections including square, rectangle, circle, and ellipse with an additive manufacturing method. To investigate the impact of micro-channel heat sink cross-sectional geometry on thermal resistance, Taguchi’s L25 orthogonal array was utilized. Reynolds number and electric power were selected to be the input parameters. The experimental tests were conducted using an experimental setup and distilled water as the working fluid in the laminar flow regime. The results obtained from the experimental tests indicated that in the range of electric power from 4 to 12 W and Reynolds numbers of 50, 100, 150, 200, and 250, the micro-channel heat sink with a square cross-section exhibits the highest heat transfer performance. Finally, an analysis of variance was conducted to study the impact of the Reynolds number and electric power factors on thermal resistance. The findings revealed the significant effect of electric power on thermal resistance in micro-channel heat sinks compared to the Reynolds number in the laminar regime. Additionally, a comparison was made with other available results.

通过微通道散热器进行冷却可转移电气设备中多余的热通量，并提高其功能容量、可靠性和使用寿命。本文采用AlSi10Mg粉末，采用增材制造方法制造了四种横截面为方形、矩形、圆形和椭圆形的微通道散热器。为了研究微通道散热器横截面几何形状对热阻的影响，采用了田口的 L25 正交阵列。选择雷诺数和电功率作为输入参数。实验测试是使用实验装置和蒸馏水作为层流状态下的工作流体进行的。实验结果表明，在电功率4~12 W、雷诺数50、100、150、200、250范围内，方形截面微通道散热器表现出最高的散热效果。传热性能。最后通过方差分析研究雷诺数和电功率因数对热阻的影响。研究结果揭示了与层流状态下的雷诺数相比，电力对微通道散热器热阻的显着影响。此外，还与其他可用结果进行了比较。