内置过滤器边界对小型化液压油箱内流场的影响

随着液压油箱向小型化方向不断发展，体积占比较大的过滤器对油箱内流场影响愈加明显。为明确内置过滤器边界对流场的具体影响规律，以液压油箱回油区和吸油区为研究对象，结合Fluent模块中的多孔介质模型对过滤器进行有限元数值模拟。探究过滤器安装位置、边界范围对油箱内部流场影响，并对比不同边界下内流场速度值、能量耗散以及颗粒沉降情况。同时，通过理论计算和PIV可视化试验验证文中过滤器模型和仿真方法的正确性以及仿真结果的准确性。最终得到物理边界对流场影响的评价指标，基于指标参数揭示出过滤器边界对内流场的影响规律，给出较优边界范围的选择依据。通过总结过滤器边界对于油箱内流场的影响规律，为液压油箱的小型化设计提供参考。

Influence of Built-in Filter Boundary on Flow Field in Miniaturized Hydraulic Tank

With the continuous development of hydraulic tanks in the direction of miniaturization, the filter, which accounts for a relatively large volume, has an increasingly obvious impact on the flow field in the oil tank. In order to clarify the specific influence of the boundary of the built-in filter on the flow field, the paper takes the oil return area and the oil suction area of the hydraulic tank as the research object, combined with the porous media model in the fluent module to carry out the finite element numerical simulation of the filter. Explore the influence of the filter installation position and boundary range on the internal flow field of the fuel tank, and compare the internal flow field velocity, energy dissipation and particle sedimentation under different boundaries.At the same time, the correctness of the filter model and simulation method and the accuracy of the simulation results are verified through theoretical calculations and PIV visualization experiments. Finally, the evaluation index of the influence of the physical boundary on the flow field is obtained. Based on the index parameters, the law of the influence of the filter boundary on the internal flow field is revealed, and the basis for selecting a better boundary range is given. The influence law of the filter boundary on the flow field in the oil tank is summarized, and a reference for the miniaturization design of the hydraulic tank is provided.