With airborne transmissions found as one of the major transmission routes of SARS-CoV-2, its transmission in airliner cabin environments drew special attention due to high number of imported cases and in-cabin transmissions. This study numerically investigated the transmission of COVID-19 by cough-induced particles in a cabin section of Boeing 737 model. One passenger was coughing in each case, while cough particles with measured size distributions were released during coughs and were tracked using the Lagrangian framework. Outcomes revealed that cough flow released by passengers could develop rapidly into a strong turbulent cough jet, breaking up the local airflow field. The released cough particles were largely dominated by the cough jet within 5 s, especially the first 1.5 s. Deposition of particles under 100 µm were relatively delayed when released from a window-seat location. Small particles (under 50 µm) released by a window-seat passenger were more likely to spread widely in the studied cabin section, which could lead to the highest exposure risks to nearby passengers. Also, due to ventilation design and seating arrangement, cough particles released by the middle-seat passenger were found easily trapped in his/her own local environment. Cough particles released from aisle-seat passengers had the least exposure risk to adjacent passengers.

空气传播是 SARS-CoV-2 的主要传播途径之一，由于大量输入病例和机舱内传播，其在客机机舱环境中的传播引起了特别关注。这项研究对波音 737 模型机舱部分中咳嗽诱导颗粒对 COVID-19 的传播进行了数值研究。在每种情况下，一名乘客都在咳嗽，而咳嗽期间会释放出具有测量尺寸分布的咳嗽颗粒，并使用拉格朗日框架进行跟踪。结果显示，乘客释放的咳嗽气流可以迅速发展成强烈的湍流咳嗽射流，破坏局部气流场。释放的咳嗽颗粒主要由 5 s 内的咳嗽喷流控制，尤其是前 1.5 s。当从靠窗位置释放时，100 µm 以下颗粒的沉积相对延迟。靠窗座位的乘客释放的小颗粒（小于 50 µm）更有可能在研究的机舱部分广泛传播，这可能导致附近乘客的暴露风险最高。此外，由于通风设计和座位安排，中间座位乘客释放的咳嗽颗粒很容易被困在他/她自己的当地环境中。靠过道座位的乘客释放的咳嗽颗粒对相邻乘客的暴露风险最小。由于通风设计和座位安排，中座乘客释放的咳嗽颗粒很容易被困在他/她自己的当地环境中。靠过道座位的乘客释放的咳嗽颗粒对相邻乘客的暴露风险最小。由于通风设计和座位安排，中座乘客释放的咳嗽颗粒很容易被困在他/她自己的当地环境中。靠过道座位的乘客释放的咳嗽颗粒对相邻乘客的暴露风险最小。