深凹立面建筑房间自然通风效果及污染物浓度分布
Natural ventilation effect and pollutant concentration distribution of a building room with deep concave facade
摘要：
以西安地区某主导风向为侧向来风的深凹立面建筑房间为研究对象,通过过渡场模型对室外场到室内场进行了多尺度CFD模拟,研究了不同开窗方式下的室内空气质量。结果显示:全开窗对于排出室内产生的污染物有较好效果,但是对于室外污染物的抵抗能力不如单开平立面窗;当室内污染物集中于某个单个房间时,开窗形成的对流通风会造成其他无污染源房间内的污染物浓度增大;当污染物分散在各个房间时,对流通风则可以有效降低各房间污染物浓度,降低幅度约为50%;单开平立面窗能有效杜绝室外污染物进入室内,而增大出风口是排出室内污染物的最好方法。
Abstract：
Taking a deep concave facade building room with a dominant wind direction of lateral wind in Xi’an as the research object, the multi-scale CFD simulation of outdoor field to indoor field is carried out through the transition field model, and the indoor air quality under different window opening modes is studied. The results show that the full-opening window has a good effect on the discharge of indoor pollutants, but its resistance to outdoor pollutants is not as good as that of the single-opening flat wall window. When the indoor pollutants are concentrated in a single room, the convection ventilation formed by opening windows will increase the concentration of pollutants in other rooms without pollution sources. When the pollutants are scattered in each room, convection ventilation can effectively reduce the concentration of pollutants in each room by about 50%. Single-opening a flat wall window can effectively prevent outdoor pollutants from entering the room, and increasing the air outlet area is the best way to discharge indoor pollutants.
Keywords:deep concave facade; residential building; natural ventilation; window opening mode; pollutant concentration; indoor air quality; building facade