摘要
在高层建筑开窗自然通风的情况下,下层窗户的排风会由于浮升力的作用经由上层窗户部分进入同侧的上层房间,造成污染物的垂直传播。本文通过现场示踪气体的测量和对气态和颗粒态污染物的模拟发现,在无风或微风条件下,约有5%的下层排风污染物会进入上层房间。此结论与香港SARS爆发时不同楼层的感染分布是一致的。
For naturally ventilated high-rise residential buildings, the exhaust air coming out of the upper part of the window of a floor may re-enter the lower part of the open-window at the immediate upper floor. In this study, field measurement and computational fluid dynamics （CFD） simulation to quantify the re-entry ratio were carried out. It was around 5% in windless conditions. This result was in line with the infections distributions at different floors during SARS outbreak in Hong Kong.
出处
《建筑科学》
北大核心
2008年第10期47-50,54,共5页
Building Science
关键词
污染物传播
高层建筑
实验
模拟
contaminants transport, high-rise building, experiment, stimulation
