A flow-regime based pressure drop model is developed to correlate experimental data in the intermittentand annular flow regime. For the intermittent region, an alternative method for microchannel pressure droppredictions based on the average kinetic energy of the mixture is developed. A parameter based in the Webernumber, the Lockhart-Martinelli parameter, and the liquid to vapor density ratio is proposed for pressure droppredictions in the annular flow region.The two correlations were built on experimental data of R410A, R134a, and air-water mixtures with massfluxes ranging from 50 to 300 kg/(s.m2), with quality ranging from 0 to 1. 6-port and 14-port aluminummicrochannel tubes with hydraulic diameters of 1.54 mm and 1.02 mm, respectively, were used for the two-phasepressure drop experiments.Entrance/exit pressure drop were directly measured with an additional experiment. The losses due to theentrance/exit zones have been found to exhibit homogeneous flow characteristics, and were correlated to ahomogeneous flow parameter based on the kinetic energy of the flow field.
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机译：建立了基于流态的压降模型，以关联间歇和环形流态下的实验数据。对于间歇区域，开发了一种基于混合物平均动能的微通道压降预测方法。提出了基于Webernumber的参数，Lockhart-Martinelli参数以及液汽密度比来预测环形流动区域中的压降。这两个相关性是建立在R410A，R134a和空气-水混合物的实验数据基础上的。质量流量范围为50至300 kg /（s.m2），质量范围为0至1。两相压力分别使用水力直径为1.54 mm和1.02 mm的6通和14通铝微通道管跌落实验：进/出口压降直接通过其他实验测量。已经发现由于入口/出口区引起的损失表现出均匀的流动特性，并基于流场的动能与均匀的流动参数相关。
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