著者

竹内 寛久 仲村 英也 綿野 哲

出版者

The Society of Powder Technology, Japan

雑誌

粉体工学会誌 (ISSN:03866157)

巻号頁・発行日

vol.49, no.3, pp.191-200, 2012-03-10 (Released:2012-03-22)

参考文献数

21

被引用文献数

2 1

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Numerical modeling of individual particle motion and fluid flow in an impact pulverizer was conducted using a Computational Fluid Dynamics (CFD) - Discrete Phase Model (DPM) coupling model. The impact pulverizer consists of high-speed rotating hammers and a static concavo-convex stator. Influences of the rotor geometries on particle impacts against stator walls were investigated. It was found that particles in the impact pulverizer were accelerated by the fluid drag force caused by the rotating hammers but not by the impact force from the hammers, resulting in impacts against walls of the static stator. Velocities and frequencies of the impacts between particles and walls of the static stator were analyzed under various number of hammers and clearances. As the number of hammers increased, the velocity and frequency increased because velocity of the fluid in circumference of the grinding chamber increased. The number of particle impacts against walls of the static stator decreased with an increase in the clearance. The impact energy which was calculated from the velocity and frequency of the particle impacts has the similar tendency with the experimental ones.