• 关键词：PM₁  切割器  性能测试系统  切割粒径  几何标准偏差

• 基金项目：北京市科委项目（No.Z161100000716004）；国家自然科学基金（No.41575119，41775121）；国家重点研发计划（No.2017YFC0211404）

• 阮兵
• 北京航空航天大学空间与环境学院, 北京 100191

• 李兴华
• 北京航空航天大学空间与环境学院, 北京 100191

• 谢岩
• 北京航空航天大学空间与环境学院, 北京 100191

• 王威
• 北京航空航天大学空间与环境学院, 北京 100191

• 李垚
• 北京航空航天大学空间与环境学院, 北京 100191

• 摘要：为对PM₁切割器的性能进行准确评估，本文设计搭建了两套PM₁切割器性能测试系统.结果发现，多分散气溶胶测试系统发生的气溶胶稳定、均匀，符合对数正态分布；单分散气溶胶测试系统发生的气溶胶稳定，单分散性良好.采用上述两套系统对5种PM₁旋风切割器进行了性能评价，结果表明，两套系统测试结果基本一致，5种旋风切割器的切割粒径D₅₀均在（1.0±0.1）μm之间，sharp-cut和Stairmand两类结构设计的切割器几何标准偏差σ_g分别在1.2±0.1和1.4±0.1之间.

• Abstract：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.

• Key words：PM₁  size selectors  performance measurement system  cutting diameter  geometric standard deviation

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