以某铁路旅客站房高架候车层两侧的高架车道为研究对象，采用CFD数值模拟的方法，模拟计算了高架候车厅周围污染物的浓度分布，结合《环境空气质量标准》分析了高架车道污染物对车站落客区和高架候车厅新风取风口空气品质的影响。研究结果表明，静风工况下高架车道对新风口影响较大，污染物浓度随着高度增加而降低，其中高架候车厅主进站口附近 CO 浓度最高达到8.4mg/m3，能够满足卫生标准，两侧浓度偏高，某些区域浓度超标；主导风工况下，高架候车层周围CO浓度得到明显降低，室外空气对CO有较好的稀释作用，能够满足卫生标准。%This paper focuses on the elevated traffic road of a Railway Station, the concentration filed of pollutants around the elevated waiting hall are simulated by using CFD numerical simulation method. According to “Environmental Air Quality Standard”, the impact of pollutants emitted from elevated traffic road on stopping area and fresh air inlet are analyzed. Results show that, the pollutants exhausted from cars have much influence on fresh air inlet when the ambient air speed is 0m/s, following the increase of height, the effect is weaker, the concentration of CO are 8.4mg/m3 around the stopping area;while, the pollutants level is much lower when the ambient air speed is 1.8 m/s, which means that the pollutants are effectively diluted by the ambient air. Both of the two conditions meet the upper limit level of 10 mg/m3 for“Environmental Air Quality Standard”.
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