Research On Transport Behavior And Garment Distribution Characteristics Of Pollutants In Residential Construction

Air quality around residential buildings is directly affected by urban air quality. Nowadays air quality of residential buildings is mainly polluted by traffic vehicle emissions. when pollutants pours into the surrounding buildings, it spreads to the building under the natural wind pressure.In the modern society, people spend most of their time spent in the building environment, therefore, it has great significance to study transport properties of pollutant in improving the air quality indoor and outdoor.First of all, new model of environmental quality under turbulent factor was deduced based on the basis environmental quality model. Secondly, Xucheng park residence buildings are chosen to be the research object in this article. By using the CFD(Computational Fluid Dynamics) numerical simulation software, Multi-way transmission behavior of pollutants was analysised under the condition of typical wind direction and speed in winter and summer. Finally, multi-way transmission behavior of pollutants released by linear of vehicles as well as the component of pollutants spread to the upper units when kitchen exhaust pollution was in different floors were simulationed.The results showed The results show that as follows. For outdoor pollutant concentration field, density of the pollutant in the windward side of buildings is higher than the upstream direction. It is easy for gas pollutants to spread into buildings when building windward side is the short side. Compared with large windward area, air pollutants are mostly blocked to sides so as to make the complex components of pollutants is the lower. In vertical direction, density of the pollution sources is closed to zero in the upper part six meters and the pollutant flow to downstream. Density of the pollution in upstream area is close to zero when the hight is increased to twelve meters. Along with the rising of the cross section height, the extremum concentration of the pollutants is decreasing. On top of the building, the pollutant concentration is almost zero. The pollutant density in the building the wind shadow area is low. Pollutant density of wind strengthen areas and turbulent eddies is higher.For the indoor pollutant concentration field, pollutant density is higher Near the entrance of the middle cells then that far away from the center. The pressure difference between import and export windows is small when the ventilation windows are in the same building sides, so the pollutant easily deposition and the indoor air quality is poor. When the windows are in alternate rows, the indoor air environment is good and pollutant density is relatively low. Pollutant density in wind channel is similar as that near the entrance in house type C. In the process of outflow from the residential units, pollutants stranded in a closed room leading that density level was slightly lower than the current. The pollutants concentration declines along the downstream direction at the exit. The contaminant level of the entrance is the lowest in this layer in house type A. At the same time, in indoor pollutants gathering place, the pollutant density level was slightly larger than to wind flow where the pollutants gathering indoor.When gas pollution sources are in different height, Pollutants pour into the superstructure of interior components and decreased as the height increased, the pollutants into the superstructure of interior components and the component decreased as the height. But, with the increase of height of pollution source, first component that pollutants sources pour into the superstructure increases and then decreases. When the pollution source is located in four layers, components that gas pollutants pour into the superstructure interior are highest.