Kudryashova Olga, Sokolov Sergei, Vorozhtsov Alexander
Institute for Problems of Chemical and Energy Technologies, Siberian Branch of the Russian Academy of Sciences, St. Socialist, 1, 659322 Biysk, Russia.
Laboratory of Metallurgy Nanotechnologies, National Research Tomsk State University, Lenin Avenue, 36, 634050 Tomsk, Russia.
Materials (Basel). 2023 Aug 20;16(16):5701. doi: 10.3390/ma16165701.
When developing neutralization systems for harmful agents, it is necessary to understand the mechanisms of the formation and evolution of an aerosol cloud in a closed or open space. Effective decontamination with aerosol clouds is provided by a rather high particle concentration and dispersion in an open space or on contaminated surfaces. This paper considers neutralization systems based on pulsed powder aerosol generators. It is shown that an aerosol cloud consisting of micron- and submicron-sized particles appears for several seconds after spraying. A further evolution of the aerosol cloud in a room is associated with the gravitational settling, diffusion, and coagulation of particles and their settling on the walls and ceiling. In the case of an open space or a ventilation system in a room, the evolution of the aerosol cloud is affected by the airflow. The main purpose of this paper is to determine the most important parameters and critical conditions of pulsed aerosol generation. A mathematical model is, thus, proposed for pulsed aerosol generation, and its parametric study is conducted in the most typical conditions. The purpose performance predicted by the model is the mass concentration of aerosol particles in the air and on surfaces, depending on the time of particle spraying and dispersion.
在开发针对有害制剂的中和系统时，有必要了解封闭或开放空间中气溶胶云的形成和演变机制。在开放空间或受污染表面，通过相当高的颗粒浓度和分散度可实现对气溶胶云的有效净化。本文考虑基于脉冲粉末气溶胶发生器的中和系统。结果表明，喷雾后几秒钟内会出现由微米级和亚微米级颗粒组成的气溶胶云。气溶胶云在室内的进一步演变与颗粒的重力沉降、扩散、凝聚以及它们在墙壁和天花板上的沉降有关。在开放空间或室内通风系统的情况下，气流会影响气溶胶云的演变。本文的主要目的是确定脉冲气溶胶生成的最重要参数和临界条件。因此，提出了一个用于脉冲气溶胶生成的数学模型，并在最典型的条件下进行了参数研究。该模型预测的目标性能是取决于颗粒喷雾和分散时间的空气中及表面上气溶胶颗粒的质量浓度。
