人员久坐的密集场合空气感染机率提高，简单的全面通风方式已经不能满足保护室内人员健康和应对疾病传播危害的需求，发展兼具舒适、疾控和健康的高效通风系统具有重要的研究意义，相关研究亟待开展。个性化通风作为一种高效的通风方式，将新风直接输送到人的呼吸区，预期可对空气病原体的传播进行直接、有效的干预。我们前期研究发现通风与人体微环境的交互作用直接影响人的暴露风险。在此基础上本课题将通过真人与假人实验相结合，示踪颗粒与示踪气体相对照的方法，结合数值模拟分析，针对个性化送风对人体微环境内病原体传播的干预特性进行深入研究，进一步明确个性化通风对飞沫传播干预的有效作用粒径，阐明个性化通风与全面通风耦合方式下的人体微环境气流交互作用对暴露风险的影响机制，并优化耦合参数得到兼顾人体健康、节能和舒适的通风控制方法，将为高人员密度室内环境下的空气传播疾病控制提供新思路，为系统工程应用奠定理论基础。

The probability of air infection is increased in sedentary crowded places, and a simple comprehensive ventilation mode can no longer meet the needs of protecting indoor health and dealing with the hazards of disease transmission. The development of high efficiency ventilation system with comfort, disease control and health has important research value and application prospect, and the related research needs to be carried out urgently. Personalized ventilation, as an efficient way of ventilation, is possible to deliver fresh air to human respiratory area, and is expected to directly and effectively intervene the transmission of airborne pathogens. Our previous studies have found that the interactions of ventilation and human microenvironment directly affect human exposure risk. On this basis, this subject will conduct both human and manikin experiment, compare tracer particles with tracer gas, and combine numerical simulation analysis. A detailed study on the characteristics of quasi intervention of personalized air microenvironment on exposure of pathogens will be performed. It is aimed to further clarify the effective droplet size intervened by personalized ventilation, to clarify the mechanism of impact of flow interactions of personalized ventilation coupled with general ventilation on human exposure risk, and to obtain optimized the coupling parameters that can simutaneously affect human health, energy saving and thermal comfort with personalized ventilation for optimazition control. This study will provide new thinking of airborne disease control under high-occupancy environment and lay theoretical foundation for the engineering.application of the personalized ventilation system.