Optimization of ventilation corridor design parameters based on ventilation performance across different urban forms

Urban ventilation corridors are an important planning tool for improving urban microclimate environments. However, existing studies often focus on case analyses of specific urban areas, lacking systematic analysis of wind corridors and surrounding urban forms. Therefore, this paper takes the main urban area of Nanjing as the research object, using multi-source urban data as the foundation. A numerical simulation method is employed to quantitatively study the ventilation effects of wind corridors, aiming to find the optimal combination of street blocks and urban ventilation corridors for different wind corridor forms. Subsequently, an optimization strategy for urban ventilation corridors is proposed. The simulation results show that increasing the width of the ventilation corridor helps to improve the average wind speed inside the corridor. When the corridor width is 150m and the angle between the corridor and the dominant wind direction is 22.5°, the ventilation efficiency of the corridor is optimal. This study provides a quantitative decision-making basis for the regulation of urban morphological parameters for urban ventilation corridor planning, and provides a scalable method for the optimization of wind environment in high-density cities.