文献类型：期刊文献

英文题名：Numerical and Experimental Investigation of PM1 Particle Charging in Ventilation Ducts with Coupled Electrostatic and Flow Fields

作者：Lei, Donghui[1];Tao, Shanlong[2];Zhu, Yong[1];Yang, Xiaoyong[1];Bai, Zhishan[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mech & Power Engn, Shanghai 200240, Peoples R China

年份：2025

卷号：64

期号：23

起止页码：11558

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20252218512034);WOS:【SCI-EXPANDED(收录号:WOS:001497490400001)】；

基金：This work was supported by the National Natural Science Foundation of China (52200130, 22308100, 22078102).

语种：英文

外文关键词：Air cleaners - Electrostatic force - Gas fuel purification

摘要：In this study, a novel numerical model was established that considered the bidirectional coupling effect between the flow field and the electric field. The experiment of gas velocity interference with charger current is designed. For the first time, the migration of air ions in an electrostatic field was verified by experiment and qualitatively analyzed. Using a novel numerical model validated through the experiment, the charging process of aerosol particles under the coupling effect of the flow field and electrostatic field was further quantitatively analyzed. The results show that an increase in gas velocity leads to a linear increase in downstream charge density and electric field strength. An increase in the gas velocity leads to the downstream migration of air ions, resulting in the loss of particle charge. This phenomenon is inversely correlated to particle size. The charge loss was greatest between 0.5 and 2 m/s. The charge enhancement ratio of 0.01 mu m particles after 1 s resident time was nearly 80%, which was almost twice that of 0.1 and 1 mu m particles. The charge enhancement ratio of 0.01 mu m particles was 2 similar to 3 times larger than that of 0.1 and 1 mu m particles at the same migration distance. Increasing the migration distance of submicrometer aerosols in the electrostatic field can effectively enhance the particle charge. These provide new theoretical support for the application of air purification and microbial inactivation.