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摘要 基于国内外现有车库通风量计算理论，并借助CFD方法，分析了多层车库在不同通风量和不同排风口设置位置下的通风气流组织效果，并对部分污染负荷下的风量需求特性进行了分析。结果表明，多层车库的通风量确定可采用单台车所需排气量法进行估算，并推荐采用稀释浓度法进行设计计算；其排风口宜布置于车库顶部以利于污染物有效排除。另外，部分污染负荷下的风量需求比例要高于对应的污染负荷比例。 关键词 　多层车库　风量需求　风口位置 Optimization design of the ventilation requirement characteristics and air outlet layout of multi-storied garage By Sun Yongqiang, Zhang Xu and Wang Jun Abstract Based on the current theory of garage ventilation at home and abroad, analyses the air distribution effects under different ventilation rates and air outlet configuration and the requirement characteristics at partial pollution load by means of CFD methodology. The results show that the ventilation rate of multi-storied garage can be estimated with single vehicle displacement method and that the diluted concentration method is recommended；the exhaust outlets should be installed on the upper part of the garage for effectively removing of pollutants. Moreover, the proportion of outdoor air requirement for partial pollution loads is higher than that of the pollution load. Keywords multi-storied garage, ventilation rate requirement, air outlet position