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基于两相流欧拉理论对大型矿浆搅拌槽内部流场进行了三维模拟,深入研究了3种不同桨型对矿浆体积分数分布的影响。模拟结果表明:在大型矿浆搅拌槽搅拌过程中,搅拌桨的四周形成一个负压区,在负压区的上下产生旋转相反的涡流;矿浆流速的最大值出现在搅拌桨的浆叶区,且标准三叶推进式叶轮所产生的流速最小,紊流效应小;在转速和矿浆体积分数相同的条件下,标准六叶直叶片式叶轮和六斜叶开启涡轮式叶轮在搅拌过程中都有槽底沉降区域出现,矿浆体积分数分布不均,而标准三叶推进式叶轮矿浆体积分数混合均匀,搅拌效果最佳。
Based on the Eulerian theory of two-phase flow, the three-dimensional simulation of the flow field inside a large slurry stirred tank was carried out. The effects of three different paddle types on the distribution of slurry volume fraction were studied. The simulation results show that during the agitating process of the large slurry agitation tank, a negative pressure zone is formed around the agitator paddle and the opposite vortex is generated above and below the negative pressure zone. The maximum value of the slurry flow rate appears in the paddle zone of the impeller Standard three-blade impeller impeller flow generated by the smallest, turbulent effect is small; speed and slurry volume fraction of the same conditions, the standard six-leaf straight vane impeller impeller and the opening of six turbine blades have a groove in the mixing process The bottom sedimentation area appeared, and the slurry volume fraction was unevenly distributed, while the standard clover impeller impeller slurry volume fraction was mixed well and the stirring effect was the best.