搭建了微槽道的单相实验台,分析了氮气在不同深/宽比、长径比及水力直径的微槽道中流动特性。层流区的摩擦常数与理论预测值吻合较好(除L=20mm工况),层流到湍流的转捩均有不同程度的提前(转捩Re数在1000左右);在湍流区,槽道的长径比变小、相对粗糙度的增大(或水力直径的减小)及长度的减小可使流动阻力增大;拟合出了湍流区微槽道的几何参数与摩擦常数的关联式。 A micro-channel single-phase experiment bench was set up to analyze the flow characteristics of nitrogen in micro-channels with different depth / width ratio, aspect ratio and hydraulic diameter. The laminar flow zone friction constant is in good agreement with the theoretical predictions (except for L = 20mm), and the laminar-to-turbulent flow transitions have different degrees of advancement (the Reynolds number is about 1000). In the turbulence zone, The aspect ratio becomes smaller, the relative roughness (or the decrease of hydraulic diameter) and the decrease of length can increase the flow resistance; the geometric parameters and the frictional constants of the micro-channel in the turbulence zone are fitted Correlation.