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Research on the influence of system pressure to oil containing suspended particles[J].计算力学学报,2017,34(6):785~792

Research on the influence of system pressure to oil containing suspended particles
Research on the influence of system pressure to oil containing suspended particles

DOI：10.7511/jslx201706016

 作者 单位 E-mail 陈彬 重庆工商大学 废油资源化技术与装备工程研究中心, 重庆 400067 hustchb@163.com 刘阁 重庆工商大学 废油资源化技术与装备工程研究中心, 重庆 400067

油液在运行过程中不可避免地会产生颗粒物，影响油液的正常使用，甚至出现设备故障，因而分析含悬浮颗粒油液的动态特征，掌握在不同压力变化条件下油液及颗粒物的变化规律具有重要意义。利用两相流体理论建立了含悬浮颗粒油液的悬浮流动力学模型，通过特征线法进行了数值求解，将数值结果与实验数据比较，具有较好的一致性；根据所建模型，分析了不同系统压力条件下悬浮流中各相的脉动规律。结果表明，流场中各相参数的脉动幅值随着系统压力的增加而增大；管路始端和终端各相参数的脉动时刻分别位于1/4脉动周期（T）的奇数倍和偶数倍处，管路中段各相参数的脉动时刻则位于T/8的奇数倍处；悬浮颗粒速度会受到油液速度拖曳力作用，其变化趋势与油液速度基本一致，颗粒浓度分布与油液压力的变化趋势完全相反。

Running oil inevitably produces particulate matters, and the particulate matters will affect the normal use of the oil,even cause equipment failure.Thus it is of great significance to analyze the dynamic characteristics of oil containing suspended particles,and to understand how oil and particles change their properties under different pressures.A dynamic model of suspension flow containing suspended particles is established by means of the theory of two-phase fluid mechanics,and numerical solutions are obtained by characteristic line method.The numerical results are compared with the experimental data and show good consistency; pulsation trend of each phase of suspension flow was analyzed under different system pressures.The result shows that the pulsation amplitude of each phase of the flow field increases with the system pressure increase.The pulse moments of the parameters of each phase at the pipeline head and the pipeline terminal respectively occur at the odd and even multiples of a quarter of the pulsation period (T/4),while the pulse moments of the parameters of each phase inside the pipeline occur at the odd multiples of T/8.The velocity of suspended particles will be affected by the oil drag force,and its tendency is consistent with the oil velocity.The trend of particle concentration distribution is opposite to that of the oil pressure.