城市街道汽车排放物扩散过程的数值模拟

Numerical Study on the Dispersion of Urban Traffic Emitted Pollutants

在湍流扩散模型基础上，采用计算机数值计算方法研究城市街道汽车排放物扩散过程．计算结果与风洞试验结果趋于一致，表明湍流扩散模型反映了风洞试验模型的真实物理过程，数值模拟是研究这一问题的有效手段．

Based on turbulence dispersion model [1,2] and windtunnel investigation[3],a hybrid model is built to simulate the dispersion of traffic emitted pollutants in an urban steet canyon.The hybrid model enhances the reliability of the numerical model.Results show that the turbulenco dispersion model represents the physical model in the windtunnel investigation.Numerical simulation is a powerful tool to study the urban traffic emission pollution.