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采用基于CFD的Euler-Lagrange方法,模拟研究了搅拌铸造法制备SiO2/Al颗粒增强复合材料在不同搅拌转速(200、400、600r/min)下的增强颗粒分布特性。在不同搅拌速度下制备了SiO2/Al复合材料铸件,对复合材料铸件不同位置处的颗粒分布特性进行金相观测和量化分析,并与数值模拟结果对比。结果表明,试验量化结果与数值模拟结果一致;搅拌速度太低或过高使颗粒在搅拌槽特定区域聚集,产生较多的团聚;最优的搅拌转速是400r/min。
The CFD-based Euler-Lagrange method was used to simulate the particle distribution characteristics of SiO2 / Al particle reinforced composites prepared by stirring casting at different stirring speed (200, 400, 600r / min). The SiO2 / Al composite castings were prepared at different stirring speeds. The grain distribution characteristics at different positions of the composite castings were metallurgically observed and quantified, and compared with the numerical simulation results. The results show that the experimental results are in good agreement with the numerical results. When the stirring speed is too low or too high, the particles gather in the specific area of the mixing tank to produce more agglomeration. The optimum stirring speed is 400r / min.