中文摘要：

基于实验方法，对室外悬浮颗粒物向室内流动扩散规律进行研究．在按比例搭建的用以模拟室外室内环境的2维实验平台中，通过测量0．3～10．0μm区间段内不同粒径悬浮颗粒物从室外环境进入室内混合扩散的粒子数密度变化过程，实验结果表明：在不同通风情况下，室内不同位置处的颗粒物稳态粒子数密度存在差异；流场结构对某一特定位置颗粒的分布与扩散有显著影响，颗粒粒径对颗粒的分布与扩散也有明显的影响，粒径越大，扩散速度越低；人口风速大小对颗粒分布与扩散有很大影响，人口风速越大，不同粒径的颗粒在分布与扩散方面表现出的差异越小，在无对流的自由扩散情况下，这种不同粒径颗粒间的差异最为明显．

英文摘要：

The transport and distribution of aerosol particles from outdoor environment to indoor environment were experimentally studied. A scaled two-dimensional experimental setup was built to simulate the indoor and outdoor environment, the time-dependent concentration of the particles from outdoor with a diameter distribution of 0.3-10.0 μm was measured inside the chamber to illustrate the influence of the particle diameter on the distribution and dispersion of the particles. The results show that the difference of the particle concentration is observed for different ventilation situations, because the flow field configuration effectively influences the particle dispersion at certain position in indoor environment. The particle diameter also influences the concentration distribution and the dispersion of the particles. The larger the particles, the lower the dispersion efficiency is. When the inflow air velocity is high, the difference of the particle concentration distribution among the particles with different diameters is very little. When there is no inflow gas at the inlets, the difference reaches the highest level.