6种常规搅拌器的剪切性能研究

发布时间：2018-03-12 09:54

本文选题：搅拌　切入点：剪切性能　出处：《化学工程》2017年08期 　论文类型：期刊论文

【摘要】：不同搅拌工况下剪切性能的需求是选用搅拌器的一个重要指标,文中基于对常规的6种搅拌器流场的CFD模拟,计算了搅拌器各自的剪切性能量纲一数C_3,分析了搅拌流场中剪应力的累计概率分布及统计平均结果。二者对比发现:从宏观平均效果上看,搅拌器剪切性能满足直叶桨斜叶桨,圆盘涡轮开启涡轮桨式;而剪应力极大值影响作用则是直叶圆盘涡轮斜叶圆盘涡轮直叶桨式斜叶开启涡轮直叶开启涡轮斜叶桨式。因此,对剪切作用敏感的搅拌过程,在采用常规的搅拌器剪切性能评价的基础上,还需要充分考虑搅拌流场中剪应力极大值的影响,合理选用搅拌器。
[Abstract]:The requirement of shear performance under different stirring conditions is an important index of selecting agitator. This paper is based on the CFD simulation of the flow field of six kinds of agitators. The shear performance dimensions of agitator C3 are calculated, and the cumulative probability distribution and statistical average results of shear stress in agitator flow field are analyzed. It is found that the shear performance of agitator meets the oblique blade propeller of straight blade from the macroscopic average effect. The effect of the maximum shear stress on the turbine propeller is that of the straight blade, the straight blade, the straight blade, the straight blade, and the straight blade. Therefore, the agitation process is sensitive to the shear action. Based on the conventional evaluation of the shear performance of agitator, it is necessary to consider the influence of the maximum shear stress in the mixing flow field and select the stirrer reasonably.
【作者单位】：西北大学化工学院;
【基金】：国家自然科学基金资助项目(11102153) 陕西省自然科学基础研究计划青年人才资助项目(2013JQ2001) 省级大学生创新创业训练计划基金资助项目(S201710697020)
【分类号】：TQ051.72

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