Liu Zhuxun, Wu Jingyi, Yang Guang, Zhang Xintai, Dai Zheng
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
COMAC Shanghai Aircraft Design & Research Institute, Shanghai 201203, China.
Heliyon. 2023 Mar;9(3):e13920. doi: 10.1016/j.heliyon.2023.e13920. Epub 2023 Feb 23.
Ventilation systems for aircraft cabins are mainly used to maintain a comfortable environment in the cabin and ensure the health of passengers. This study evaluates the decontamination performance of two cabin ventilation systems, the displacement ventilation (DV) system and the mixing ventilation (MV) system, in preventing contamination by virus (COVID-19)-laden droplets. The Euler-Lagrange method was used to computationally model droplet dispersion of different diameters and their behavior in the two systems was contrastively analyzed. Statistics on droplet suspension ratios and duration as well as the infection probability of each passenger were also computed. It was found that11.07% fewer droplet remained suspended in the DV system were than those in the MV system 10s from droplet release. In addition, the number of droplets extracted from the exhausts in the DV system was 13.15% more than the MV system at the 400s mark. In the DV system, higher ambient wind velocities were also found to locally increase infection probability for passengers in certain locations.
飞机客舱通风系统主要用于维持客舱内的舒适环境并确保乘客的健康。本研究评估了两种客舱通风系统，即置换通风（DV）系统和混合通风（MV）系统，在防止含病毒（新冠病毒-19）飞沫污染方面的净化性能。采用欧拉-拉格朗日方法对不同直径飞沫的扩散进行计算建模，并对比分析了它们在这两种系统中的行为。还计算了飞沫悬浮率和持续时间的统计数据以及每位乘客的感染概率。研究发现，从飞沫释放起10秒时，DV系统中悬浮的飞沫比MV系统中少11.07%。此外，在400秒时，DV系统从排气口排出的飞沫数量比MV系统多13.15%。在DV系统中，还发现较高的环境风速会局部增加某些位置乘客的感染概率。
