Research On The Design Strategy Of The Spatial Morphology On Both Sides Of The Ventilation Corridor In The Relocation Area Of The Old Airport

In recent years,the relocation and renewal of old urban airports has become the general trend of many cities.The renewal of the old airport with the development vision of"new city center"was the first choice of most of old airport renewal and reconstruction projects in China,and the airport clearance requirements have left precious"natural wind corridor"for the city.Facing the important geographical location,development orientation and composite urban functions of the airport relocation area,creating a good urban wind environment is of great research significance not only for the area itself,but also for the city.Faced with the current situation in urban planning discipline,the lack of space form design on both sides of the ventilation corridor corridor leads to the lack of systematicness and poor landing of the design at the meso micro level under the ventilation corridor system planning level.Therefore,this paper takes the interior and the interface space on both sides of the Urban Ventilation corridor as the primary research object,and explores the space form design strategy to enhance the ventilation efficiency of the ventilation corridor in the old airport area.This paper selects the relocation area of old domestic airports as the research object,and studies the strategy of creating wind environment at the meso-micro scale within the research range of 4-15km~2.On the one hand,the wind environment planning should first conform to the framework of the city’s ventilation corridor.On the other hand,the current wind environment in the old airport relocation area is generally good,and the overall goal of the ventilation corridor system planning is to reduce wind speed loss.Based on this,this paper first constructs a"two-layer surface"wind environment simulation and evaluation method combining single wind corridor layer and area layer.This paper combined with Envi-met V4 and SCstream software,the evaluation criteria of wind speed at pedestrian height in summer and winter and average wind speed at pedestrian height in ventilation corridor are determined.Then it explores the correlation between the wind speed of the wind corridor and the shape index of the space interface inside and on both sides of the corridor.Using the"control variable"as the basic method,it studies the correlation between the ventilation efficiency in the ventilation corridor and 12 indexes such as the angle of the city’s dominant wind direction,the roughness of the underlying surface and the street width,and summarizes the design strategy of the space shape on both sides of the wind corridor from the perspective of wind environment.Finally,it is proposed that the general planning of the Urban Ventilation corridor in the old airport relocation area should follow the basic framework of"macro level--ecological priority,meso level--reticular layout,micro level--loss reduction",that is,the urban level should comply with the framework of the urban wind corridor,the area level should form a reticular layout of the wind corridor system,and the single wind corridor level should build a ventilation corridor to reduce the air loss.Based on the above research,combined with the sample case of Xuzhou daguozhuang airport relocation area for application.Based on the summary and evaluation of the spatial distribution characteristics of wind environment at the pedestrian height in summer and winter in daguozhuang airport and its surrounding areas,the optimization strategies of wind environment at the urban level,regional level and single ventilation corridor level are proposed.1.To protect and restore the urban water green pattern and build a network ecological system;2.To comply with the leading wind direction of the city,to build the urban wind corridor system;3.To build an important ventilation corridor in the area,optimize the wind environment in the corridor,and focus on Building 7 wind corridor spaces.Finally,numerical simulation is carried out for the final scheme,and wind environment assessment is carried out to verify the feasibility of the scheme.