桨式搅拌釜不同桨叶角度下搅拌性能的数值模拟
Numerical Simulation of Stirring Performance of a Paddle Agitator with Different Blade Angles

在现有桨式搅拌釜中，针对不同的桨叶角度，运用Fluent软件对搅拌釜内固液混合效果进行数值模拟。通过分析轴截面液相速度矢量图和固含率云图可知，随着桨叶与水平面间角度的增加，底部的固体颗粒沉积越多，减小桨叶与水平面间角度虽然有利于减少底部固体沉积，但同时导致了上部固体颗粒含量较少。考虑整体混合效果，得出桨叶与水平面间角度成30？时，搅拌釜内固液混合效果最佳。
In the existing paddle agitator, the software Fluent was used to simulate the solid-liquid mixing effect in the agitator according to different blade angles. By analyzing the liquid phase velocity vector diagram and solid holdup cloud diagram of the axial section, it can be seen that with the in-crease of the Angle between the blade and the horizontal plane, more solid particles are deposited at the bottom. Although the reduction of the Angle between the blade and the horizontal plane is conducive to the reduction of solid deposition at the bottom, it also leads to the lower content of solid particles at the top. Considering the overall mixing effect, it is concluded that when the Angle between the blade and the horizontal plane is 30？, the solid-liquid mixing effect in the agitator is the best.