不同结构螺带式搅拌釜内非牛顿流体混合特性数值分析

晓月 熊(东华大学，中国)
凤国 田(东华大学，中国)

摘要

本文通过CFD模拟，系统探究了不同螺带搅拌釜内非牛顿流体的流体动力学特性，并结合示踪剂法量化评价了釜内物料的动态混合特征。所考察结构主要包括即平面封底、椭圆封底以及螺杆复合式螺带搅拌釜。研究详细辨析了不同条件下釜内的速度矢量场、示踪剂浓度演变过程，以及不同位置的动态混合时变过程。结果表明，螺杆复合式螺带搅拌结构将混合时间由椭圆封底螺带结构下的70s混合时间缩短至48s、将能量消耗由平底螺带搅拌结构下的396W降至346W，表现出良好的综合性能。

关键词

螺带式搅拌釜；流体动力学；混合特性；几何结构；CFD。

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DOI: http://dx.doi.org/10.12345/hgyjxjz.v3i2.23795