铝熔体搅拌过程中搅拌功率特性的分析

Analysis of Stirring Power Characteristics in Stirring Process of Molten Aluminum

根据相似原理推导三层桨叶功率影响因素关联式,应用Fluent软件对铝熔体搅拌过程中的搅拌功率特性进行模拟分析,研究工艺参数和桨叶结构对搅拌功率的影响。分析结果表明:搅拌功率与搅拌转速的三次方成正比;搅拌功率随铝熔体温度的升高而降低,铝熔体温度升至1 073 K时搅拌功率变化趋于平缓;搅拌功率随桨叶倾角的增大而降低,倾斜角为0°时最大;此外,桨叶浸入深度和桨叶层间距对搅拌功率也有一定的影响。

Based on the similarity principle, the correlation formula of power influencing factors of three-layer blades was deduced. Fluent software was used to simulate and analyze the stirring power characteristics of molten aluminum and the effect of processing parameters and blade structure on stirring power was studied. The analytic result shows that the stirring power is proportional to the third power of the stirring speed. The stirring power decreases as the temperature of the molten aluminum rises, and the stirring power changes gently as the temperature of the molten aluminum rises to 1 073 K. Stirring power decreases with increased blade rake angle, and reaches the maximum value when the blade rake angle is 0°. Furthermore, the blade immersion depth and the blade layer spacing also have a certain influence on the stirring power.