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以工程上常用的66%的乙二醇水溶液作为工质,对几何特性相似而高宽比不同的4种纯铝矩形微通道内的流动特性进行了实验研究,得到了微通道冷板基础性的设计数据。实验测量了Reynolds数在50~500之间的流动阻力系数。实验结果表明:通道高度H与宽度W之比对微通道流阻特性有显著的影响;当Re数小于100时,在实验误差内,流动阻力系数的值近似等于经典理论计算值;随着Re数的增大和高宽比的变化,f的值远大于理论值,这可能是由微通道内部壁面粗糙度效应所导致的。
Using the commonly used 66% ethylene glycol aqueous solution as the working fluid, the flow characteristics of four kinds of pure aluminum rectangular microchannels with similar geometrical characteristics and different aspect ratios were experimentally studied, and the basic properties of microchannel cold plates Design data Experimentally measured the Reynolds number in the 50 ~ 500 flow resistance coefficient. The experimental results show that the ratio of the channel height H to the width W has a significant effect on the flow resistance characteristics of the microchannel. When the Re number is less than 100, the value of the flow resistance coefficient is approximately equal to the classical theoretical calculation value within the experimental error. The increase of number and the change of aspect ratio, the value of f is much larger than the theoretical value, which may be caused by the roughness effect of the inner wall of microchannel.