Mahmoud Seif, Bennett James, Jones Byron, Hosni Mohammad
National Institute for Occupational Safety and Health, Centres for Disease Control and Prevention, U.S. Department of Health and Human Services, Division of Field Studies and Engineering, Cincinnati, OH, USA.
Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS, USA.
Int J Vent. 2024 Dec;23(2):104-124. doi: 10.1080/14733315.2023.2290920.
We compare two aerosol surrogate tracers in aircraft cabins for breathing and coughing sources: tracer gas collected in the ACER Boeing 767 mock-up and fluorescent particles collected in an actual Boeing 767 aircraft by the US Transportation Command (TRANSCOM). Each source was located individually in window and middle seats. Exposure generally decreased with source distance. A window seat breathing source resulted in good agreement between datasets for exposure (as percent of release) for the TRANSCOM hangar-AFT testing mode, which corresponds to the 11-row cabin ACER laboratory space. Average tracer gas exposure for a middle seat breathing source was higher in the ACER study than the fluorescent particle tracer exposure in the TRANSCOM study. Using a coughing source in a window seat, the exposure for the TRANSCOM data was higher within the first two rows from the source before decreasing to and tracking with the ACER levels, until increasing after about 5 m away. A similar trend was recorded for a middle seat coughing source with higher overall exposure for the TRANSCOM data. Sources of exposure variation between the studies include particle deposition. This work helps optimize aerosol dispersion research in aircraft cabins and provides some validation to the existing studies.
在ACER波音767模拟舱中收集的示踪气体，以及美国运输司令部（TRANSCOM）在一架实际波音767飞机上收集的荧光颗粒。每个源分别位于靠窗座位和中间座位。暴露程度通常随源距离的增加而降低。对于TRANSCOM机库-AFT测试模式（对应于ACER实验室11排客舱空间），靠窗座位的呼吸源在数据集之间的暴露（占释放量的百分比）方面达成了良好的一致性。在ACER研究中，中间座位呼吸源的平均示踪气体暴露高于TRANSCOM研究中的荧光颗粒示踪剂暴露。在靠窗座位使用咳嗽源时，TRANSCOM数据在前两排的暴露高于源处，然后下降并与ACER水平保持一致，直到大约5米外后上升。中间座位咳嗽源的TRANSCOM数据总体暴露更高，也记录到了类似趋势。研究之间暴露差异的来源包括颗粒沉积。这项工作有助于优化飞机客舱中的气溶胶扩散研究，并为现有研究提供了一些验证。
