【摘要】 采用Euler-Euler多相流模型,建立了回转圆筒内气-固-固三相流动守恒方程,对两种粉体的混合均化过程进行了数值计算。计算结果表明:随着回转时间的增长,两种粉体的最大体积分数均逐渐下降,直至理论均值附近;不同时刻样本均值始终围绕理论均值波动,但样本方差逐渐减小并趋于平稳。计算结束时,滑石粉体积分数的样本方差为0.001 01,均值为0.499 55,与模拟计算理论均值0.5相比误差-0.1%,符合工程要求,计算模型有效。更多还原

【Abstract】 Euler-Euler multiphase flow model was used to establish the conservation equations for gas-solidsolid there-phase flow in rotary cylinder, the numerical calculation of the two powders homogenizing process was carried out. The results show that the maximum volume fractions of powders gradually decreased to the theory average values along with the rotating time. The sample average values waved around the theory average value in different time, but sample variance gradually decreased and tended to be stable. When calculation finished, the sample variance of volume fractions of talcum powders was 0.001 01 and the sample average value was 0.499 55,the relative error was-0.1% compared with the theory average value of 0.5. The results satisfy with engineering requirements and the calculation model is proved valid.更多还原