对当量直径为177.8 μm、长为3 mm的矩形截面并列微通道进行了试验研究,通过高速摄影仪对并列微通道内空气水的两相流动进行了可视化研究，试验中观察到几种典型的流型；利用分相流模型、均相流模型对并列微通道的整体压降进行预测，并与测得的试验值进行了对比，通过计算各个模型的平均绝对误差来比较其预测效果.结果表明：均相流模型对整体压降的预测效果好于分相流模型；均相流模型中，用Dukler黏度计算式得到的预测值平均绝对误差最小，预测效果最好.

Experimental studies were conducted to parallel rectangular microchannels with hydraulic diameter of 177.8 μm and length of  3 mm, in which the airwater twophase flow was visualized using high speed camera, where a number of typical flow patterns were observed. Total pressure drop in the parallel rectangular microchannel was predicted respectively with separated and homogenous flow model, of which their mean absolute error (MAE) was compared with that of actual measurements. Results show that the homogenous flow model has better effects than the separated flow model in prediction of total pressure drop, and the MAE calculated with Dukler correlations based on the homogenous flow model is the minimum, indicating a good prediction effect.