低温液体流动沸腾数值计算中的相间传热模型

Inter-phase Heat Transfer Models in Numerical Simulation of Boiling Flow of Cryogenic Liquids

采用双流体模型预测了液氮在垂直管内的流动沸腾过程,着重考察和评价了五个常用的相间传热模型对数值计算结果的影响,找出了最优的相间传热模型;同时,研究还发现相间传热模型对流动压降的预测并无明显影响。

The boiling flow of nitrogen in a vertical tube is simulated using a two-fluid model. The emphasis is put on evaluating 5 well-known interfacial heat transfer models and the best model suitable to analyzing cryogenic fluids is selected. At the same time, it is found that the pressure drop prediction for a boiling flow is almost independent of the interfacial heat transfer models.