论文标题
面部覆盖物，气溶胶分散和减轻病毒传播风险
Face Coverings, Aerosol Dispersion and Mitigation of Virus Transmission Risk
论文作者
论文摘要
SARS-COV-2病毒主要是通过从感染者口弹出的含有病毒的液体颗粒传播的。脸部盖可以减轻病毒传播的风险，但其外在效力尚未完全确定。目的：使用以背景为导向的Schlieren技术，我们旨在调查一个人在静静而重呼吸的同时咳嗽，咳嗽的同时弹出的空气流动，并带有不同的脸部盖。结果：我们发现，如果未经过滤的咳嗽射流距离被解析至预期的最大最大距离为2-3 m，则所有没有出口阀的面板都没有插座阀将前流降低至少63％，并且可能高达86％。但是，手术和手工面罩以及面罩会产生明显的泄漏喷气机，可能会带来重大危险。结论：面罩的有效性主要是基于次要喷气机的产生而不是减轻前贯流的能力来考虑的。
The SARS-CoV-2 virus is primarily transmitted through virus-laden fluid particles ejected from the mouth of infected people. Face covers can mitigate the risk of virus transmission but their outward effectiveness is not fully ascertained. Objective: by using a background oriented schlieren technique, we aim to investigate the air flow ejected by a person while quietly and heavily breathing, while coughing, and with different face covers. Results: we found that all face covers without an outlet valve reduce the front flow through by at least 63% and perhaps as high as 86% if the unfiltered cough jet distance was resolved to the anticipated maximum distance of 2-3 m. However, surgical and handmade masks, and face shields, generate significant leakage jets that may present major hazards. Conclusions: the effectiveness of the masks should mostly be considered based on the generation of secondary jets rather than on the ability to mitigate the front throughflow.
