论文部分内容阅读
研究了1.0～10.0μm的呼吸道颗粒物在混合送风、置换送风和地板送风的办公室环境中的浓度空间分布和瞬态演变规律.仿真结果表明:小于10.0μm的飞沫在混合送风的房间内几乎是均匀分布的.然而,在置换送风和地板送风中,垂直温度梯度使得小于10.0μm的飞沫在人体呼吸区高度聚集,导致一个较高的浓度水平,因此室内人员被感染的概率比较高.由咳嗽或者打喷嚏产生的飞沫在置换和地板送风中的稀释(浓度衰减)比在混合送风中慢,这是因为置换和地板送风中人体呼吸区的风速比较小,飞沫在此聚集,不易被气流携带排出室内空间.
The spatial distribution and transient evolution of the concentration of airborne particulate matter (1.0 ~ 10.0μm) in the mixed air supply, replacement air supply and floor air supply were studied. The simulation results show that the droplets less than 10.0μm in mixed air supply However, the vertical temperature gradient in the replacement and floor blowing allows droplets less than 10.0 μm to accumulate at the height of the respiratory area of the human body, resulting in a higher concentration level, so that indoor personnel are infected (Coughing or sneezing), the dilution (concentration decay) of the droplets generated by coughing or sneezing is lower in the replacement and floor air blowing than in the mixed air supply due to the comparison of the wind speed of the human respiratory area in replacement and floor airing Small, droplets in this gathering, not easy to be carried by the air discharge indoor space.