Research on urban park design combined with the urban ventilation system

摘要

The disorderly construction of cities,the emissions of industrial gases and motor vehicle exhaust aggravate the environmental problems such as urban heat island and haze,thus imminent improvement of the urban thermal environment is required.Urban ventilation system can facilitate urban air circulation,which can alleviate the urban heat island effect and improve air quality to some extent.As an important part of the urban landscape system,the cool island effect of parks plays an important role in improving the urban thermal environment,combining the cold island effect of the park with the surrounding roads,building a small ventilation system in the area,which will help improve air quality in the region.This paper selects Chengdu Renmin Park as a case,and analysis the effects of different layout on the wind velocity by CFD method.The results show that(1)air passage disperses the air flow in the interior of the park;;(2)but by air passage,the velocity at urban road where faced the air passage be improved in some degree;;(3)moreover,the graphic and the length of the air passage has great effects on wind velocity.