中文摘要：

描述了机械搅拌条件下应用吹气发泡法制备新型功能材料闭孔泡沫铝的过程．在双流体模型基础上，引入多重参考系法预测水平轴机械搅拌池内的气液两相流动．应用RNG扣￡模型模拟湍流效应，考察了桨叶转速及孔口气速对流场特性和局部气含率的影响，进而应用体积积分的方法预测平均气含率．计算结果表明，预测结果与文献中的实验数据定性一致．

英文摘要：

Production of aluminum foam by air injecting into molten aluminum composites under mechanical stirring has been investigated. A two-dimensional computational two-fluid model incorporated with the multi-reference frame method is used to predict the gas-liquid flow in a horizontally axial stirred vessel. Turbulence effect is simulated with a RNG k-e model. The influences of gas inlet velocity and impeller rotational speed on bubble rising velocity and local gas volumetric fraction are examined. Furthermore, volumetric average of total gas fraction is predicted by volume integration. Computational results show a qualitative agreement with experimental data from the literature.