PM₁切割器性能测试系统的搭建与应用

In order to assess performance of PM₁ size selectors, two measurement system were designed and evaluated. Polydisperse aerosol measurement system generated stable aerosols and the aerosols in the chamber were in good spatial uniformity. The aerosol generated showed a lognormal distribution. Monodisperse aerosol measurement system generated stable aerosols with excellent monodispersion. The performances of five types of PM₁ cyclone were evaluated by the two systems. The results from two system were consistent with each other. Cutting diameter (D₅₀) of five types of PM₁ cyclone were (1.0±0.1) μm. Geometric standard deviation (σ_g) of two groups of the cyclone (sharp-cut and Stairmand) were 1.2±0.1 and 1.4±0.1, respectively.