旋转器诱导的空气流对冲击粉碎机中的颗粒碎裂的影响:计算流体动力学-离散元件方法研究研究
Xun Wang1, Yong Huang1,2,3, FengBin Zhang4
1College of Mechanical and Electrical Engineering, Xinjiang Agricultural University, Xinjiang, Urumqi CN 830052, China.
ACS omega
|October 13, 2025
概括
本研究模型使用CFD-DEM模拟来影响粉碎机性能. 更高的转子速度增加了颗粒应力和破裂,也增加了能量损失,突出了优化操作参数的必要性,以实现高效的矿物加工.
科学领域:
- 矿物加工工程 矿物加工工程
- 计算流体动力学的流体动力学.
- 离散元素方法 离散元素方法
背景情况:
- 冲击粉碎机在矿物加工中至关重要,需要提高效率以更好地利用资源.
- 了解粉碎机内的粒子动力学和碎片化是优化性能的关键.
研究的目的:
- 使用CFD-DEM模型模拟冲击粉碎机室中的气体-固体相互作用.
- 为了研究旋转器诱导的空气流对粒子运动和碎片化的影响.
- 分析不同操作条件,特别是转子转速对压碎效率的影响.
主要方法:
- 开发了一种双向合的计算流体动力学 (CFD) 和离散元件方法 (DEM) 数值模型.
- 模拟粒子运动,空气流模式和压碎室内的碎片.
- 分析了不同转子速度下的粒子轨迹,速度,应力和键断裂.
主要成果:
- 确定了三种不同的粒子轨迹 (高速,低速,循环),受旋转器近距离的影响.
- 观察到粒子应力和断裂概率随着旋转器转速 (200-600rpm) 的增加而增加.
- 在过度旋转速度时发现了显著的能量消耗,并注意到随着旋转速度的增加,空气流速增加.
结论:
- 转子速度和空气流量显著影响冲击粉碎机中的粒子动力学和碎片化.
- 优化转子速度至关重要,以平衡粉碎效率与能量消耗和磨损.
- 这些发现为改进冲击粉碎机设计和操作参数以提高效率提供了理论基础.
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