References(13) Cited-By(7) Effect of eccentrically located position of impeller on mixing time was investigated in agitated vessels of different bottom shapes. The impellers used were a 4-bladed propeller and a 6-bladed flat paddle, which were commonly used in process industries, and the bottom shapes tested were a cone-fillet, a fully profiled and an ellipsoid bottom in addition to a flat bottom. The effect of off-bottom clearance of impeller on mixing time was also investigated at optimum eccentric locations for both impellers. For propeller, mixing times for all eccentric location covered in this work (e/R = 0.25–0.50, e: distance from shaft to center line of tank, R: radius of tank) became short drastically compared to those for centrally located for all bottom shapes and there was no significant effect of bottom shapes on mixing time. On the other hand, for flat paddle, mixing times were decreased proportionally with an increase in e/R. At optimum eccentric locations, those are e/R = 0.33 for propeller and 0.50 for flat paddle, the mixing times for propeller decrease drastically and then increase slightly with an increase in off-bottom clearance for all bottom shape and those for flat paddle decrease almost proportionally with an increase in off-bottom clearance but differed more or less according to the bottom shapes.
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机译：参考文献（13）引用（7）在不同底部形状的搅拌容器中研究了叶轮偏心位置对混合时间的影响。所使用的叶轮为4叶片螺旋桨和6叶片平桨，这些叶片通常用于加工行业，所测试的底部形状为锥形圆角，完全成型和椭圆形底部以及平坦底部。在两个叶轮的最佳偏心位置上，还研究了叶轮底部间隙对混合时间的影响。对于螺旋桨，该工作涵盖的所有偏心位置的混合时间（e / R = 0.25–0.50，e：轴距油箱中心线的距离，R：油箱半径）与所有位置的中心位置相比大大缩短了底部形状，并且底部形状对混合时间没有显着影响。另一方面，对于扁平桨，混合时间随e / R的增加成比例地减少。在最佳偏心位置，对于螺旋桨而言，e / R = 0.33，对于平板桨而言，e / R = 0.50，对于所有底部形状，螺旋桨的混合时间急剧减少，然后随着底下间隙的增加而略有增加，对于平板桨而言，混合时间几乎减少与底部间隙的增加成正比，但根据底部形状有所不同。
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