Research On The Method Of Urban Ventilation Corridors Planning Based On CFD Technology

In recent years, as the urbanization process of China continues to accelerate, urban population and high density space are increasing rapidly, which leads to the urban internal ventilation condition becoming more and more poor, directiy affects the urban ecological environment and people’s physical and mental health. On the one hand, urban development and construction of large-scale and intensive internal and tall buildings preventing the air passage, which aggravated the urban heat island effect.On the other hand, due to the emission of a large number of urban life and production and automobile exhaust, the air pollution in cities is becoming more and more serious. Especially in winter haze seriously affected the physical and mental health of urban residents in recent years. At the same time, in the city within the retention of air pollution and accelerated the spread of epidemic diseases in the city within the scope of. The research has showed that it is an important means to solve the problem of urban climate environment in the planning level to improve the urban ventilation environment and promote the benign circulation of the city and outside air. At present, all over the country have been carried out on the Urban Ventilation corridor planning special research. But as the ventilation corridor research started late in our country, many cities often in the overall urban planning stage most of the time did not have to account for the problem of Urban Ventilation, the relevant theoretical research is still in exploration stage. In view of the above reasons, this paper attempts to explore applicable for the construction of China’s current urban development feasible ventilation corridor planning method system.Referring to the concept of Urban Ventilation System in Germany, and by the use of CFD technology for technical support, according to the different needs of the old city and new urban ventilation to problem oriented the effective improvement of old urban ventilation environment at the same time, through the reasonable control and ventilation analysis, to ensure that the new urban future, forming a good ventilation environment. This article through to the city level, the district level and the block level 3 aspects of urban wind environment simulation, to identify and build the city at all levels of wind tunnel, and put forward management and control requirements. Specific research: Step on the growing problem of urban climate and environment and the need for serious situation of urban air environmental research analysis to identify the significance of this paper. The second step of the domestic and foreign relevant theoretical studies and planning practices were analyzed and summarized, found duct planning needs to regional planning large-scale plan to specific architectural form of small-scale design closely integrated research ideas; the third step of the cities ventilation gallery road already have planning methods were analyzed and found its own characteristics and shortcomings methods. And on this basis, propose new ideas duct system which is based on CFD technology plus four vent duct construction and control methods, improve existing methods of urban planning corridor ventilation system. Finally, through the center of the city of Anqing actual case ventilation corridor planning for the proposed planning methodology for verification.