Abstract: The disturbed flow caused by three six-storied residential buildings and a twenty-storied tall tower, respectively, as well as the distribution of traffic tail gas from a nearby road, are simulated by using an urban climate model. The results show that with the same built areas the ventilation ability of the atmospheric environment around the tall tower is better than that around the multi-storied buildings.

Key words: urban ventilation, urban climate model, flow field, concentration distribution

摘要： 应用城市气候数值模式，分别计算了3栋6层住宅楼和1栋20层住宅楼两类建筑形式产生的风场，以及在此风场中街道汽车尾气的浓度分布。计算结果表明在总建筑面积相同情况下，高层建筑周围环境的通风自净能力要优于多层建筑。

关键词: 城市通风能力, 城市气候模式, 流场, 浓度场