The infectious aerosol flow pattern and distribution in the ambulance's compartment are simulated by a two-phase flow model, and tested by carbon dioxide which is used as a substituted aerosol contamination source. 以CO2气体为模拟有害气溶胶污染物,运用两相流动模型计算其在救护车病员室内的流动特征与分布状态,并通过试验进行了验证。