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多孔介质渗透模型在空气过滤中的适用性研究
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Abstract:
本文将多孔介质渗透模型的理论应用于空气过滤材料和结构中，针对某特种车辆发动机配备的空气过滤器进行2种多孔介质渗透模型的仿真分析。利用材料分析软件GeoDict生成接近真实结构的三维滤材模型，得到滤材性能数据。将滤材性能数据代入多孔介质渗透数学模型进行空气过滤器数值模拟，可以快速得到空气过滤器的流量–阻力特性曲线。搭建过滤器性能试验台获取台架试验结果，与2种模型的仿真结果对比分析发现两种模型中的幂函数多孔介质渗透模型的计算结果更接近试验值，由此得出幂函数模型更适用于空气过滤器的理论研究。
In this paper, the theory of porous media infiltration model is applied to the air filter material and structure, two kinds of porous media infiltration models are simulated and analyzed for the air fil-ter of a special vehicle engine, using the material analysis software GeoDict to generate a three-dimensional filter material model close to the real structure, and get the performance data of the filter material. The flow resistance characteristic curve of air filter can be obtained quickly by substituting the performance data of filter material into the porous media permeability mathemat-ical model for numerical simulation of air filter. A filter performance test bench was built to obtain the test results. Compared with the simulation results of the two models, it was found that the cal-culation results of the power function porous media infiltration model of the two models were closer to the test values, so the power function model was more suitable for the theoretical research of air filter.
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