Monodisperse aerosols are essential in many applications, such as filter testing, aerosol instrument calibration, and experiments for validating models. This paper describes the design principle, construction, and performance of a monodisperse-aerosol generation system that comprises an atomizer, virtual impactor, microcontroller-based isokinetic probe, wind tunnel, and velocity measurement device. The size distribution of the produced monodisperse aerosols was determined by an optical particle counter. The effects of atomizer characteristics, the rates of minor and major flow, and solution criteria were investigated. It was found that all these parameters affect the generation of monodisperse aerosol. Finally, the expected geometric standard deviation (≤1.25) of monodisperse aerosol particles was obtained with the most suitable atomizer for 10% oleic acid in ethyl alcohol solution with 5%–15% minor flow, where the ratio between the nozzle-to-probe distance and acceleration-nozzle-exit diameter was 0.66. The constructed monodisperse-aerosol-generation system can be used for instrumental calibration and aerosol research.

单分散气雾剂在许多应用中至关重要，例如过滤器测试，气雾剂仪器校准以及用于验证模型的实验。本文介绍了一种单分散气溶胶发生系统的设计原理，构造和性能，该系统包括雾化器，虚拟撞击器，基于微控制器的等速探针，风洞和速度测量装置。通过光学粒子计数器确定所产生的单分散气雾剂的尺寸分布。研究了雾化器特性，次要和主要流量的比率以及溶液标准的影响。发现所有这些参数影响单分散气雾剂的产生。最后，预期的几何标准偏差（≤1。25）用最合适的雾化器获得单分散气雾剂颗粒，该雾化器用于乙醇溶液中10％的油酸，小流量为5％–15％，其中喷嘴到探针的距离与加速喷嘴的出口直径之比为0.66。构建的单分散气溶胶发生系统可用于仪器校准和气溶胶研究。