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化工学报  2015 

液体连续相撞击流反应器中流体混合时间的数值模拟

DOI: 10.11949/j.issn.0438-1157.20141158, PP. 2049-2054

Keywords: 撞击流,反应器,混合,数值模拟

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Abstract:

在混合时间理论计算基础上利用CFD技术模拟连续操作的LISR混合过程,数值计算与验证混合时间的变化规律。结果表明,随着输入比有效功率增大,混合时间先急剧减小后逐渐趋于平稳;LISR撞击区一次撞击局部混合时间在0.25s以内,与经验公式或理论公式计算所得结果在数量级上完全一致,证明数值方法分析一次撞击局部混合时间是可行的,而且可以弥补实验无法测定中间过程参量的不足;进一步数值分析宏观混合时间与微观混合时间发现,二者大小相差1个数量级,但二者变化规律处于一种联动平衡状态,该结果与前期理论分析结果一致;本研究所得结论可为后续LISR混合强化机理与性能研究提供定量参考。

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