润滑油和纳米材料对蒸发两相流型影响模拟分析

Modeling the Effect of Lubricants and Nanomaterial on the Evaporation two Phase Flow Patterns Inter-Transformation

理论模拟了润滑油、纳米材料的添加以及质量流量对蒸发换热管内制冷剂流体流型的影响。润滑油的溶入促使各流型转换提前,制冷剂质量流速越高,弹状流区域扩大,含量相同及特性相近的润滑油对两相流的影响相近,与纳米Al2O3的影响相比,纳米CuO的添加更加压缩了弹状流区域。

The effects of lubricants and nanomaterials and flow velocity on the evaporation two-phase flow patterns inter-transformation were modeled. The transformation between every flow pattern is forced in advance, the region is enlarged as the flow velocity increases, the effect of different lubricants with similar characteristics and same content is much similar, the slug flow existing region is compressed much more by addition of nano-CuO.