A common form of particulate air filters is the pleated filter. The pressure drop and particle removal efficiency are the most important performance indicators of this filter. A computational fluid dynamics (CFD) tool was utilized to predict the pressure drop of a two-stage filter cartridge. In the CFD analysis, the flow through the porous medium was used as an indicator of the pressure drop in the filter. The pressure drop of the two-stage filter was predicted through an experiment involving a single-stage filter at 1 m/s. The pleated filter cartridge size was 361 × 277 × 25 (L × W × H) mm³ and the pitch of the pleats was 3.8 mm. Four classes of filters (E10, E11, E12, H13) were used in the experiments. The filter resistances of the four grades were estimated through the single-stage filter experiment, and the pressure drop of the two-stage filter was predicted at 0.5–1 m/s. To verify the predicted CFD analysis values, two-stage filters were fabricated and tested at 0.75 m/s. For the E12 + H13 combination filter, the analytical value was 111 Pa, which agreed with the experimental value of 109.9 Pa. The other filters exhibited an error of <2%.

颗粒空气过滤器的常见形式是褶式过滤器。压降和颗粒去除效率是该过滤器最重要的性能指标。计算流体动力学（CFD）工具用于预测两级滤筒的压降。在CFD分析中，通过多孔介质的流量被用作过滤器中压降的指标。通过涉及一个单级过滤器的实验以1 m / s的速度预测了两级过滤器的压降。褶式滤芯尺寸为361×277×25（L×W×H）mm ³褶的节距为3.8 mm。实验中使用了四类过滤器（E10，E11，E12，H13）。通过单级过滤器实验估算出了四个等级的过滤器阻力，而两级过滤器的压降预计为0.5-1 m / s。为了验证预测的CFD分析值，制造了两级滤波器，并在0.75 m / s的速度下进行了测试。对于E12 + H13组合过滤器，分析值为111 Pa，与实验值109.9 Pa一致。其他过滤器的误差均小于2％。