中文摘要：

分别以质量分数为0．2％、0．5％、0．8％的A12O3-R141b纳米制冷剂与纯制冷剂R141b为实验工质，在截面尺寸为1mm×2mm的矩形微通道内进行实验，研究流动沸腾过程中两相摩擦压降。将两相摩擦压降的实验值与5种分相模型预测值进行对比，Qu-Mudawar模型预测值和实验值最为吻合，平均绝对误差为21．4％，Chishiolm模型预测效果最差，平均绝对误差为42．5％。结合实验数据在Qu-Mudawar模型基础上进行修正，得到的修正关联式能较好的预测实验两相摩擦压降，平均绝对误差降为11．3％。

英文摘要：

Two phase frictional pressure drop of flow boiling in rectangular microchannels with a cross section dimensions of lmm x 2mm was experimentally investigated. The working fluids were pure refrigerant R141 b and A1203-R141b nanorefrigerant （mass fraction = 0.2% ,0.5% ,0.8% ）. The experimental calcu- late values were compared with predicted values of five different separated flow models＇ correlations respec- tively. Qu-Mudawar＇ s correlation had the best predict ability, the mean absolute error was 21.4%. Mean- while, Chishiolm＇ s correlation had the worst performance, the mean absolute error was 42.5%. Based on Qu-Mudawar＇ s correlation and experiment data, a modified correlation was got and had a better predict a- bility, the mean absolute error decreased to 11.3%.