机动车行驶过程道路扬尘影响因素试验研究

机动车行驶过程道路扬尘是城区颗粒物污染的主要因素，其贡献率可达30％-50％。城市路面积尘是机动车行驶过程道路扬尘的主要尘源。路面尘受机动车车轮积压作用、机车行驶过程诱导气流、热射流等综合尘化作用的影响，再次扬向空中并扩散，造成空气中颗粒污染物TSP、PM10浓度增高。实验模拟单车行驶，研究道路粉尘负荷、车速、排放源距离对总悬浮颗粒物（TSP）、可吸入颗粒物（PM10）浓度的影响，结果显示：TSP、PM10浓度与机动车行驶速度呈显著正相关；同一车速下与路面粉尘负荷呈对数变化规律；与排放源距离呈负相关。

Study on the Effective Factors of Road Dust During Motor Vehicle Runing

The contribution rate of the road dust to particulate concentration in the urban area is 30% - 50% during motor vehicle running. Dust on the road surface is the main source. It was raised into the air and diffused again by the wheels extrusion of motor vehicles and the comprehensive role of dust such as inductive currents, hot jet and so on, causing TSP, PM10 concentrations increased. The simulation result of effection of road dust load, velocity, distance was shown that The simulation result of effection of road surface dust loading, velocity, distance off source was shown that the concentration of TSP, PM10 in the same point in the air increasesd with the concentration of road dust load and velocity, with the distance from the source increased is decreased ; TSP and PM10 concentration changes with the road dust load and related linear, and gave an index correlation with velocity changes. The relationship between concentration of PM10 and the distance from source was found to be logarithm correlation.