【摘要】 过滤技术广泛应用于化工过程、燃油和液压领域。在液压系统中，过滤器也是重要的元件之一。与针对过滤的结构设计和滤芯选材研究相比，颗粒污染物迁移是影响过滤器性能的基础因素，需要加以重视。由于颗粒污染物的尺寸较小且数量巨大，在数值模拟中完全追踪每一个颗粒难度较大。因此，以某一液压过滤器为例，采用计算流体动力学-离散相(CFD-DPM)耦合的方法，对过滤过程中颗粒污染物的迁移规律进行初步探讨，尤其是流量和油温对颗粒迁移的影响。结果表明，入口油液速度对过滤的快慢影响较大，但对于过滤效率影响较小。相比之下，油液温度在0.3 s内对颗粒的瞬态阻拦影响较大，但对于稳态的影响也较小。更多还原

【Abstract】 Filtration is a common process in chemical engineering, fuel utilisation and fluid power transmission. An oil filter is a necessary and significant part in the fluid power system. Unlike the structure design and filter material selection, the particle movement in the filter during filtration is the fundamental factor for the filter performance, and this is not attracted enough attention. Due to the size and number of the particles in the filter, it is difficult to monitor every particle’s movement during the filtration. Therefore, this work took a hydraulic oil filter as an example and applied discrete phase method to conduct a preliminary investigation on the particle movement in the filter, including how the flow rate and oil temperature affect the movement. The results showed that the flow rate of oil had a significant effect on the filtration speed but had little effect on the filtering efficiency. In comparison, different oil temperatures showed significant differences with in 0.3 s on the particle filtration but the steady states were similar.更多还原