飞机客舱空调系统过滤效果评估仿真研究

Simulation of Filtering Effect Evaluation of Aircraft Cabin Air Conditioning System

为研究飞机中高效空气过滤器对病毒、细菌颗粒及其他有害物质的过滤效果。以飞机客舱空调系统为例,建立高效空气过滤器简化几何模型,基于计算流体动力学分析,通过ANSYS Fluent软件对高效空气过滤器中污染物浓度和内部流场仿真,评估过滤效果,实现高效空气过滤器内部流场可视化。研究得出,滤网使污染物粒子发生压降,污染物粒子接近滤网区域湍流强度较强;2 m·s^(-1)入射速度下的0.3μm污染物粒子经滤网后浓度降低,污染物由中心向周围扩散。研究结果可为优化过滤器的研制提供参考。

In order to study the filtering effect of high efficiency particulate air(HEPA)filters on viruses,bacterial particles and other harmful substances in aircraft,a simplified geometric model is established by taking aircraft cabin air conditioning system as an example.Based on computational fluid dynamics analysis,pollutant concentration and internal flow field in HEPA filters are simulated by ANSYS Fluent to evaluate the filtering effect,and visualization of flow field inside HEPA filters is realized.The results show that the filter makes the pollutant particles pressure drop,and the turbulence intensity of pollutant particles near the filter is stronger.The concentration of 0.3μm pollutant particles at the incident velocity of 2 m·s-1 decreases after passing through the screen,and the pollutant disperses from the center to the periphery.The research results can provide reference for the optimization of filters.