基于CFD的冰箱门体发泡过程模拟方法

Simulation method of fridge door foaming process based on CFD

为了验证聚氨酯是否能在冰箱门体内充满以及观察在各个时刻冰箱门体内聚氨酯的体积分数,建立了聚氨酯注塑充型流动的数学模型,运用计算流体力学知识,使用前处理软件对冰箱实际门体模型进行网格的划分,使用Fluent软件进行聚氨酯注塑数值模拟,进行纯流场分析。结果表明:随着填充的进行,聚氨酯的体积分数在不断增大,空气的体积分数逐渐被聚氨酯取代,当填充进行到61s左右时,聚氨酯的体积分数相对达到最大,即充满了整个冰箱门体的腔体内部,至此填充过程结束。

To verify whether the polyurethane can be filled in the refrigerator door and observe the volume fraction of the polyurethane at all times, a mathematical model of the flowing filling of polyurethane is established, where with the knowledge of computational fluid dynamics, the writer uses the pre-processing software to divide the actual door model of the refrigerator into grids, and uses fluent software to carry out numerical simulation of polyurethane injection and analysis of pure flow field. The results show that with the filling, the volume fraction of polyurethane increases and the volume fraction of air is gradually replaced. When at 61s or so, the volume fraction of polyurethane reaches the maximum, and polyurethane fills the whole body cavity of the refrigerator door, when the filling process ends.