The climb leg is one of the most acceleration-intensive periods in a passenger aircraft flight. It was previously found that the passenger exposure to cough-released airborne contaminants during a climb may reach 2.8 to 3.0 times that compared to other legs (Elmaghraby et al., Science and Technology for the Built Environment, 2019, accepted. DOI:10.1080/23744731.2019.1576457). In the current study, airflow design and source control strategies are researched numerically for their ability to reduce cough-released airborne contaminant dispersion in the cabin of a Boeing 767-300 aircraft during a climb. Sulfur hexafluoride (SF₆) was used to mimic the contaminant, which mainly includes cough-released particles in the size range 1.6 to 3 µm in diameter. The airflow design strategies involved altering the supply airflow direction and changing the supply airflow rate. The source control strategies involved changing the cough direction, varying the cough velocity or flow rate, and moving the cougher to different locations in the cabin. Among all cases, relocation of the cougher, changing the airflow direction, and modest increases in airflow rate exhibited the highest reduction in passenger exposure to contaminant compared to the baseline climb case. The exposure reductions were 0.5–0.7 times for the first case, 0.5–0.7 times for the second case, and 0.6–0.7 times for the third case.

爬升腿是客机飞行中最加速密集的时期之一。先前已经发现，在攀登过程中，乘客暴露于咳嗽释放的空气传播污染物的可能性是其他双腿的2.8到3.0倍（Elmaghraby等人，《建筑环境科学与技术》，2019年，已接受。DOI ：10.1080 / 23744731.2019.1576457）。在当前的研究中，对气流设计和源控制策略的能力进行了数值研究，以降低爬升过程中咳嗽释放的波音767-300飞机机舱中的空气传播污染物扩散的能力。六氟化硫（SF ₆）被用来模仿污染物，污染物主要包括直径为1.6至3 µm的咳嗽释放颗粒。气流设计策略涉及改变送风方向和改变送风率。源头控制策略涉及改变咳嗽方向，改变咳嗽速度或流速，以及将咳嗽器移至机舱中的不同位置。在所有情况下，与基线爬升情况相比，咳嗽者的搬迁，气流方向的改变以及气流速率的适度增加都显示出乘客接触污染物的最大减少。第一种情况的暴露减少量为0.5-0.7倍，第二种情况为0.5-0.7倍，第三种情况为0.6-0.7倍。