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首页> 外文会议>Proceedings '96 China-Japan symjposium on particuology >Numerical simulation of particle separation for counter flow centrifugal classification system
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Numerical simulation of particle separation for counter flow centrifugal classification system

机译：逆流离心分类系统颗粒分离的数值模拟。

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摘要

A simplified physical model was devised to study the Acucut air classifier(Donaldson Company, USA). A numerical simulation model is proposed which assumes that the particle movement in the radial direction results from the equilibrium of two forces, the air drag force and the centrifugal force. Based on this equilibrium, the fine and coarse particles could be separated and carried to different outlets. The model assumes further that the particle rotation speed is equal to the air rotation speed in the rotor. Hence, the particle size separation limit can be calculated once the velocity field has been ascertained in the rotor: The application of the commercial flow-simulation software PHOENICS has improved the numerical simulation of the turbulent flow pattern in the classifier rotor. A single-phase, three-dimensional model for the classifier rotor has consequently been analyzed and the particle separation size limit predicted. Experimental results are in good agreement with the numerical simulation under the assumption that the maximum particle size is equal to the particle separation size limit.
机译：设计了一个简化的物理模型来研究Acucut空气分级机（美国唐纳森公司）。提出了一个数值模拟模型，该模型假定粒子在径向上的运动是由两个力（空气阻力和离心力）的平衡引起的。基于此平衡，可以将细颗粒和粗颗粒分离并带到不同的出口。该模型进一步假设粒子旋转速度等于转子中的空气旋转速度。因此，一旦确定了转子中的速度场，就可以计算出粒度分离极限：商业流动模拟软件PHOENICS的应用改进了分级机转子中湍流模式的数值模拟。因此，对分选机转子的单相三维模型进行了分析，并预测了颗粒分离尺寸的极限。在最大粒径等于粒径分离极限的前提下，实验结果与数值模拟吻合良好。

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