Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Study on internal flow field of rotary triboelectric separator based on CFD simulation: fly ash as reference sample
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ( IF 2.9 ) Pub Date : 2020-06-21 , DOI: 10.1080/15567036.2020.1781981
Fangyuan Ma 1, 2 , Youjun Tao 1, 2 , Min Li 3 , Yushuai Xian 1, 2
Affiliation  

CFD simulation is carried out for the internal flow field of rotary triboelectric separator by Fluent software, analyzing effects of three factors on airflow field inside rotary triboelectric separator, including feeding airflow speed, friction wheel speed, and assistant airflow speed. The best referenced simulation conditions are obtained by single separation test: the plate voltage of 24 kV, the feed frequency of 22 Hz, the friction wheel speed of 189.95 rad/s. Simulation results of feeding airflow speed show the feeding airflow speed of 4 m/s is a cutoff point of the influence for the maximum airflow velocity in the friction chamber, the sorting effect becomes worse when the feed air speed is greater than 4 m/s. Increases of feeding airflow velocity cause two effects: One is that feeding airflow can reach the surface of the friction wheel and then rotate with the friction wheel. The second is to increase the turbulence of the airflow field in the friction chamber; Simulation results of feeding airflow speed show when the rotational speed of the friction wheel is greater than 189.95 rad/s, the influence of the rotation friction wheel exceeds the airflow of feeding airflow. Under the condition of a certain feeding airflow speed, an increase of friction wheel rotate speed makes internal friction flow field velocity increase with the improve of velocity gradient, which leads to the flow field in the friction chamber is more uniform; Simulation results of assistant airflow speed show the 3 m/s assistant airflow in the sorting chamber is most beneficial to the stability of the material motion. The assistant airflow speed mainly affects the airflow field in the separation chamber, the flow field in the separation chamber is increased with the increase of the assistant airflow speed.



中文翻译:

基于CFD模拟的旋转摩擦电分离器内部流场研究:粉煤灰为参考样品

利用Fluent软件对旋转式摩擦分离器的内部流场进行了CFD模拟,分析了三个因素对旋转式摩擦分离器内部的气流场的影响,包括进风速度,摩擦轮速度和辅助气流速度。最好的参考模拟条件是通过一次分离测试获得的:板电压为24 kV,馈电频率为22 Hz,摩擦轮速度为189.95 rad / s。进风速度的仿真结果表明,进风速度为4 m / s是影响摩擦腔内最大风速的临界点,进风速度大于4 m / s时分选效果变差。进料气流速度的增加会产生两个影响:一种是进给气流可以到达摩擦轮的表面,然后随摩擦轮一起旋转。第二是增加摩擦腔中气流场的湍流。进给气流速度的仿真结果表明,当摩擦轮的转速大于189.95 rad / s时,旋转摩擦轮的影响超过进给气流的气流。在一定的送风速度条件下,摩擦轮转速的增加使内部摩擦流场速度随速度梯度的增加而增加,从而导致摩擦腔内的流场更加均匀。辅助气流速度的仿真结果表明,分拣室内的3 m / s辅助气流最有利于物料运动的稳定性。

更新日期:2020-06-22
down
wechat
bug