Frost simulation of the heat exchanger with wavy plates
Based on the formation process of frost layer of a wavy plates,a two-dimensional CFD model was established,an Euler multi-phase flow model was combined with UDF to simulate the frost process of frost layer with different working condi-tions.The water vapor mass fraction distribution,volume fraction of ice,temperature distribution,humid air velocity distribu-tion,frost layer density distribution,and the influence of air velocity and cold surface temperature on frost layer thickness were analyzed.The results show that the mass fraction of water vapor gradually decreases along the direction of wet air flow.The frost layer temperature is gradually increased along the height direction,and the volume fraction of the ice at the peak is larger than in the trough.The density of the frost layer is greatest near the cold surface area,and the average density of the frost layer is 97 kg/m3at 60 min.When the cold surface temperature is-13 ℃,the frost layer thickness increases by 39.8％compared to-10 ℃,the inlet velocity increases from 0.6 m/s to 0.8 m/s,and the frost layer thickness is increased by 3.2％.
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万方数据
