论文部分内容阅读
对当量直径为177.8μm、长为3mm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.
The rectangular microchannel with parallel cross section with equivalent diameter of 177.8μm and length of 3mm was studied and the air-water two-phase flow in the parallel microchannels was visualized by a high-speed camera. Several typical Flow model and the homogeneous flow model were used to predict the global pressure drop of the parallel microchannels and compared with the measured values.The average absolute error of each model was calculated to compare the prediction results.Results The results show that the Homogeneous Flow Model is better than the Split-Phase Flow Model in predicting the overall pressure drop. In the Homogeneous Flow Model, the predicted average absolute error is the smallest with the Dukler’s viscosity formula and the prediction effect is the best.