管翅式换热器迎风侧翅片末端霜层生长模拟研究

In terms of the phenomenon of frost growth on the windward fin end of a heat exchanger, in this paper, a frosting model on the windward fin end is established. The numerical results show that the frost on the windward fin end of a heat exchanger grows the fastest along the opposite direction of the airflow, and its growth rate gradually decreases with an increase of the angle θ. Besides, frost density and frost surface temperature also decrease with an increase of θ, and the frost layer is streamlined. After 3600 s, frost layer thickness and density at θ = 0° are 1.47 times and 1.23 times larger than those at θ = 90°, respectively. Besides, the surface temperature of the frost layer is 2.2℃ higher than later one. The results of this paper may help to provide theoretical guidance for delaying or avoiding frosting.