城市交通污染扩散高分辨率数值模拟研究

Research into a High-precision Numerical-simulation System of Urban Traffic Pollutant Diffusion

以三维对流 扩散方程为模型 ,采用 5 0m网格的高分辨率对城市中汽车尾气排放所造成的污染分布宏观状况进行模拟 ,建立了一个高分辨率城市交通污染数值仿真系统。采用该系统对广州市的一个区域进行了模拟计算 ,并与实际污染分布情况进行比较 ,结果表明系统的模拟效果良好。

Based on the convection-diffusion equation, a numerical-simulate system of urban vehicle emission diffusion is built, which simulates the diffusion of vehicle emission in the city by 50-metre grid. In addition, the system is used to simulate the distribution of vehicle emission diffusion in Haizhu District, Guangzhou City. The result shows that the simulation result is excellent.