• 关键词：交通隧道  汽车废气  城市环境影响  空气污染  风洞物理模拟

• 基金项目：

• 蒋维楣
• 南京大学大气科学系, 南京 210093

• 于洪彬
• 南京大学大气科学系, 南京 210093

• 谢国梁
• 南京大学大气科学系, 南京 210093

• 吴涧
• 南京大学大气科学系, 南京 210093

• 朱宏贵
• 上海环境科学研究院, 上海 200233

• 孙和宁
• 上海环境科学研究院, 上海 200233

• 摘要：利用风洞物理模拟手段,对处于城市街区的交通隧道风井塔和峒口排放污气的环境影响作了实验研究,并基于射流理论和现场实测,建立峒口污染物散布的预测模式,该模式用于模型区环境影响评价。研究表明,(1)隧道峒口污气排放有可能造成短时局地比较严重的污染影响,废气浓度可能超标,但影响范围不大,并且与周围建筑物、环境、气温和车辆运行状况等密切相关。(2)建筑物的空气动力学效应对污染物扩散有明显影响。(3)物理模拟手段具有其独到的优越性,模式计算与风洞测量结果可以互相检验比较。

• Abstract：By using wind tunnel simulation technique and field survey and based on the jet theory, experiments for modeling the environmental impact of automobile exhaust discharged from the ventilation tower and from the tunnel exits have been carried out.An emerical model for predicting the dispersion of air pollutants has been developed which is suitable for the assessment on environment impact in the model area.The results demonstrated that 1)automobile exhaust emitted from tunnel exits may cause serious air pollution and the concentration of waste gases may be exceeded the permission standard.However, the pollution is limited to a small area and associated to the lay out of the surrounding buildings, air temperature, and the intensity of transportation etc .;2)the aerodynamic effect of surrounding buildings affects significantly to the dispersion of the pollutants;3)the approach of physical modeling has its unique advantage and the results of model calculation and the wind tunnel measuring data can be used for mutual verification.

• Key words：transportation tunnel  automobile exhaust  urban environmental impact  air pollution  physical simulation in wind tunnel

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