微矩形通道内水的流动特性分析

【中文摘要】 设计微尺度流动实验测试系统,主要研究水在小雷诺数下流经矩形微通道时的流动特性。通过对相关实验数据进行分析计算,表明水在矩形微通道内流动时的压降值与阻力系数值均大于传统理论预测值。分析原因主要是微通道尺寸的测量误差和壁面粗糙度以及双电层的影响。

【英文摘要】 An experimental system was built to study flow characteristics of rectangular microchannel in low Reynolds numbers.The ana-lytical results indicated that pressure drop and friction factor in rectangular microchannel were bigger than those given by the conventional laminar flow theory.The analysis revealed that the error of experimental results resulted from the error of dimension measurement,roughness and the electric double layer.

【中文关键词】 微通道; 流动特性; 压降; 阻力系数

【英文关键词】 microchannel; flow characteristics; pressure drop; friction factors