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针对转动坐标系中铝熔液在SiC多孔介质内的流动传热现象 ,考虑离心力对渗流传热过程的影响 ,采用局部非热平衡假设建立多孔介质渗流传热数理模型 ,研究不同工况下流体的流速、压力损失及铝熔液和多孔介质的温度变化 .计算结果表明 :在渗透区域 ,液固两相存在温差 ,且液固温差随渗透界面的移动而减小 ;在非渗透区域 ,固体的温度曲线基本不变 .离心转速或孔隙率的增加都使渗透前沿区域液固两相温差增大 .孔隙率对流场和压力损失有较大影响
Aiming at the flow and heat transfer phenomenon of molten aluminum in SiC porous media in rotating coordinate system and considering the influence of centrifugal force on seepage heat transfer process, a mathematical model of percolation and heat transfer in porous media is established by using local non-thermal equilibrium assumption. Flow rate, pressure loss and temperature change of molten aluminum and porous media.The results show that there is a temperature difference between liquid and solid in the infiltration zone, and the liquid-solid temperature difference decreases with the movement of the infiltration interface. In the non-infiltration zone, The temperature curve is basically unchanged.Experimental results show that the increase of centrifugal speed or porosity leads to the increase of the temperature difference between the liquid and solid phases in the infiltration front.The porosity has a great influence on the flow field and pressure loss